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BEGIN:VEVENT
SUMMARY:Yoshinori Gongyo (The University of Tokyo)
DTSTART;VALUE=DATE-TIME:20200423T160000Z
DTEND;VALUE=DATE-TIME:20200423T170000Z
DTSTAMP;VALUE=DATE-TIME:20201127T091040Z
UID:ZAG/1
DESCRIPTION:Title: On a generalized Batyrev's cone conjecture\nby Yoshinor
i Gongyo (The University of Tokyo) as part of ZAG (Zoom Algebraic Geometry
) seminar\n\nAbstract: TBA\n
END:VEVENT
BEGIN:VEVENT
SUMMARY:Christopher Hacon (The University of Utah)
DTSTART;VALUE=DATE-TIME:20200428T160000Z
DTEND;VALUE=DATE-TIME:20200428T170000Z
DTSTAMP;VALUE=DATE-TIME:20201127T091040Z
UID:ZAG/2
DESCRIPTION:Title: Recent progress in the MMP for 3-folds and 4-folds in c
har p>0\nby Christopher Hacon (The University of Utah) as part of ZAG (Zoo
m Algebraic Geometry) seminar\n\nAbstract: TBA\n
END:VEVENT
BEGIN:VEVENT
SUMMARY:Arnaud Beauville (Université de Nice)
DTSTART;VALUE=DATE-TIME:20200430T150000Z
DTEND;VALUE=DATE-TIME:20200430T160000Z
DTSTAMP;VALUE=DATE-TIME:20201127T091040Z
UID:ZAG/3
DESCRIPTION:Title: Vector bundles on Fano threefolds and K3 surfaces\nby A
rnaud Beauville (Université de Nice) as part of ZAG (Zoom Algebraic Geome
try) seminar\n\nAbstract: TBA\n
END:VEVENT
BEGIN:VEVENT
SUMMARY:Chen Jiang (Shanghai Center for Mathematical Sciences\, Fudan Univ
ersity)
DTSTART;VALUE=DATE-TIME:20200505T150000Z
DTEND;VALUE=DATE-TIME:20200505T160000Z
DTSTAMP;VALUE=DATE-TIME:20201127T091040Z
UID:ZAG/4
DESCRIPTION:Title: Minimal log discrepancies of 3-dimensional non-canonica
l singularities\nby Chen Jiang (Shanghai Center for Mathematical Sciences\
, Fudan University) as part of ZAG (Zoom Algebraic Geometry) seminar\n\n\n
Abstract\nCanonical and terminal singularities\, introduced by Reid\, appe
ar naturally in minimal model program and play important roles in the bira
tional classification of higher dimensional algebraic varieties. Such sing
ularities are well-understood in dimension 3\, while the property of non-c
anonical singularities is still mysterious. We investigate the difference
between canonical and non-canonical singularities via minimal log discrepa
ncies (MLD). We show that there is a gap between MLD of 3-dimensional non-
canonical singularities and that of 3-dimensional canonical singularities\
, which is predicted by a conjecture of Shokurov. This result on local sin
gularities has applications to global geometry of Calabi–Yau 3-folds. We
show that the set of all non-canonical klt Calabi–Yau 3-folds are bound
ed modulo flops\, and the global indices of all klt Calabi–Yau 3-folds a
re bounded from above.\n
END:VEVENT
BEGIN:VEVENT
SUMMARY:Samuel Grushevsky (Stony Brook University)
DTSTART;VALUE=DATE-TIME:20200507T180000Z
DTEND;VALUE=DATE-TIME:20200507T190000Z
DTSTAMP;VALUE=DATE-TIME:20201127T091040Z
UID:ZAG/5
DESCRIPTION:Title: Geometry of moduli of cubic threefolds\nby Samuel Grush
evsky (Stony Brook University) as part of ZAG (Zoom Algebraic Geometry) se
minar\n\n\nAbstract\nThe moduli space of cubic threefolds can be thought o
f as a GIT quotient of the projective space of all cubic polynomials\, stu
died via the period map to a ball quotient\, or via the intermediate Jacob
ians. We describe the relations between various compactifications of the m
oduli space of cubic threefolds that arise in these ways\, and compute the
ir cohomology. Based on joint works with S. Casalaina-Martin\, K. Hulek\,
R. Laza.\n
END:VEVENT
BEGIN:VEVENT
SUMMARY:Kristin De Vleming (University of California\, San Diego)
DTSTART;VALUE=DATE-TIME:20200512T160000Z
DTEND;VALUE=DATE-TIME:20200512T170000Z
DTSTAMP;VALUE=DATE-TIME:20201127T091040Z
UID:ZAG/6
DESCRIPTION:Title: Wall crossing for K-moduli spaces of plane curves\nby K
ristin De Vleming (University of California\, San Diego) as part of ZAG (Z
oom Algebraic Geometry) seminar\n\n\nAbstract\nThis talk will focus on com
pactifications of the moduli space of smooth plane curves of degree d at l
east 4. We will regard a plane curve as a log Fano pair (P2\, aC)\, where
a is a rational number\, and study the compactifications arising from K s
tability for these pairs and log Fano pairs in general. We establish a wa
ll crossing framework to study these spaces as a varies and show that\, wh
en a is small\, the moduli space coming from K stability is isomorphic to
the GIT moduli space. We describe all wall crossings for degree 4\, 5\, a
nd 6 plane curves and discuss the picture for general Q-Gorenstein smootha
ble log Fano pairs. This is joint work with Kenneth Ascher and Yuchen Liu
.\n
END:VEVENT
BEGIN:VEVENT
SUMMARY:John Christian Ottem (University of Oslo)
DTSTART;VALUE=DATE-TIME:20200514T153000Z
DTEND;VALUE=DATE-TIME:20200514T163000Z
DTSTAMP;VALUE=DATE-TIME:20201127T091040Z
UID:ZAG/7
DESCRIPTION:Title: Tropical degenerations and stable rationality\nby John
Christian Ottem (University of Oslo) as part of ZAG (Zoom Algebraic Geomet
ry) seminar\n\nAbstract: TBA\n
END:VEVENT
BEGIN:VEVENT
SUMMARY:Mircea Mustață (University of Michigan)
DTSTART;VALUE=DATE-TIME:20200519T170000Z
DTEND;VALUE=DATE-TIME:20200519T180000Z
DTSTAMP;VALUE=DATE-TIME:20201127T091040Z
UID:ZAG/11
DESCRIPTION:Title: Minimal exponent and Hodge filtrations\nby Mircea Musta
ță (University of Michigan) as part of ZAG (Zoom Algebraic Geometry) sem
inar\n\n\nAbstract\nI will discuss an invariant of singularities\, Saito's
minimal exponent\, and its connections with various other invariants of s
ingularities. The minimal exponent is a refinement of the log canonical th
reshold that can be used to also measure rational hypersurface singulariti
es. This is based on joint work with Mihnea Popa.\n
END:VEVENT
BEGIN:VEVENT
SUMMARY:Zsolt Patakfalvi (École polytechnique fédérale de Lausanne)
DTSTART;VALUE=DATE-TIME:20200526T170000Z
DTEND;VALUE=DATE-TIME:20200526T180000Z
DTSTAMP;VALUE=DATE-TIME:20201127T091040Z
UID:ZAG/12
DESCRIPTION:Title: On the Beauville-Bogomolov decomposition in positive ch
aracteristic\nby Zsolt Patakfalvi (École polytechnique fédérale de Laus
anne) as part of ZAG (Zoom Algebraic Geometry) seminar\n\n\nAbstract\nAbst
ract: I will present a joint with Maciej Zdanowicz towards a positive cha
racteristic version of the Beauville-Bogomolov decomposition. Over the com
plex numbers this decomposition was shown using differential geometry meth
ods in the 70's and in the 80's. It concerns varieties with trivial canoni
cal bundle\, which we call K-trivial here. The main statement over the com
plex number is that smooth projective K-trivial varieties admit an etale c
over which splits as a product of three types of varieties: abelian\, Cala
bi-Yau and symplectic. I will present a similar statement in positive char
acteristic for (weakly) ordinary K-trivial varieties\, the proof of which
uses purely positive characteristic methods.\n
END:VEVENT
BEGIN:VEVENT
SUMMARY:Xavier Roulleau (University of Aix-Marseille)
DTSTART;VALUE=DATE-TIME:20200521T110000Z
DTEND;VALUE=DATE-TIME:20200521T120000Z
DTSTAMP;VALUE=DATE-TIME:20201127T091040Z
UID:ZAG/13
DESCRIPTION:Title: On the geometric models of K3 surfaces with finite auto
morphism group and Picard number larger than two\nby Xavier Roulleau (Univ
ersity of Aix-Marseille) as part of ZAG (Zoom Algebraic Geometry) seminar\
n\n\nAbstract\nVinberg and Nikulin classified K3 surfaces which have finit
e automorphism group and Picard number 4 and 3\,5\,..\,19 respectively. Th
at classification is lattice theoretic\, according to the Neron-Severi gro
up of these surfaces\; there are 118 such lattices. In this talk I will di
scuss on the geometric construction of these surfaces (by double coverings
or complete intersections) and describe their (finite) set of (-2)-curves
\, which gives the ample cone. Most of the moduli spaces of these K3 surfa
ces are unirational. A part of this talk is based on a joint work with Mic
hela Artebani and Claudia Correa Diesler.\n
END:VEVENT
BEGIN:VEVENT
SUMMARY:Alexandra Kuznetsova (Higher School of Economics)
DTSTART;VALUE=DATE-TIME:20200528T140000Z
DTEND;VALUE=DATE-TIME:20200528T150000Z
DTSTAMP;VALUE=DATE-TIME:20201127T091040Z
UID:ZAG/18
DESCRIPTION:Title: Sextic double solids\nby Alexandra Kuznetsova (Higher S
chool of Economics) as part of ZAG (Zoom Algebraic Geometry) seminar\n\n\n
Abstract\nAbstract: One of the first examples of unirational non-rational
threefold was provided by Artin and Mumford and it was a double cover of P
^3 branched in a nodal quartic surface\, so called quartic double solid.\n
Then Endrass studied this class of varieties and showed that the example b
y Artin and Mumford gives a unique family of non-rational nodal quartic do
uble solids. I am going to tell about the next interesting class of threef
olds --- nodal sextic double solids. I will describe 4 families of them su
ch that any non-rational variety of this type lies in one of those familie
s and explain the proof.\n
END:VEVENT
BEGIN:VEVENT
SUMMARY:Stefan Schreieder (Leibniz University)
DTSTART;VALUE=DATE-TIME:20200602T110000Z
DTEND;VALUE=DATE-TIME:20200602T120000Z
DTSTAMP;VALUE=DATE-TIME:20201127T091040Z
UID:ZAG/19
DESCRIPTION:Title: Equality in the Bogomolov-Miyaoka-Yau inequality in the
non-general type case\nby Stefan Schreieder (Leibniz University) as part
of ZAG (Zoom Algebraic Geometry) seminar\n\n\nAbstract\nWe classify all go
od minimal models of dimension n and with vanishing Chern number $c_1^{n-2
}c_2(X)=0$\, which corresponds to equality in the Bogomolov-Miyaoka—Yau
inequality in the non-general type case. Here the most interesting case is
that of Kodaira dimension n-1\, where any minimal model is known to be go
od. Our result solves completely a problem a Kollar. In dimension three\,
our approach together with previous work of Grassi and Kollar also leads t
o a complete solution of a conjecture of Kollar\, asserting that on a mini
mal threefold\, c_1c_2 is either zero or universally bounded away from zer
o. Joint work with Feng Hao.\n
END:VEVENT
BEGIN:VEVENT
SUMMARY:Caucher Birkar (University of Cambridge)
DTSTART;VALUE=DATE-TIME:20200604T130000Z
DTEND;VALUE=DATE-TIME:20200604T140000Z
DTSTAMP;VALUE=DATE-TIME:20201127T091040Z
UID:ZAG/20
DESCRIPTION:Title: Geometry of polarised varieties\nby Caucher Birkar (Uni
versity of Cambridge) as part of ZAG (Zoom Algebraic Geometry) seminar\n\n
\nAbstract\nI will talk about projective varieties polarised by ample divi
sors (or more generally nef and big divisors) in particular from a biratio
nal geometry point of view\, and present some recent results in this direc
tion.\n
END:VEVENT
BEGIN:VEVENT
SUMMARY:Yuri Prokhorov (Moscow State University)
DTSTART;VALUE=DATE-TIME:20200609T153000Z
DTEND;VALUE=DATE-TIME:20200609T163000Z
DTSTAMP;VALUE=DATE-TIME:20201127T091040Z
UID:ZAG/21
DESCRIPTION:Title: General elephants for 3-fold extremal contractions\nby
Yuri Prokhorov (Moscow State University) as part of ZAG (Zoom Algebraic Ge
ometry) seminar\n\n\nAbstract\nI will discuss effective results on the cla
ssification of extremal contractions in the 3-dimensional MMP. In particul
ar\, I will present some recent result based on joint work with Shigefumi
Mori on the existence of general elephants.\n
END:VEVENT
BEGIN:VEVENT
SUMMARY:Ilya Zharkov (Kansas State University)
DTSTART;VALUE=DATE-TIME:20200611T140000Z
DTEND;VALUE=DATE-TIME:20200611T150000Z
DTSTAMP;VALUE=DATE-TIME:20201127T091040Z
UID:ZAG/22
DESCRIPTION:Title: Topological SYZ fibrations with discriminant in codimen
sion 2\nby Ilya Zharkov (Kansas State University) as part of ZAG (Zoom Alg
ebraic Geometry) seminar\n\n\nAbstract\nTo date only for K3 surfaces (triv
ial) and the quintic threefold (due to M. Gross) the discriminant can be m
ade to be in codimension two. I will outline the source of the problem and
how to resolve it in much more general situations using phase and over-tr
opical pairs-of-pants. Joint project with Helge Ruddat.\n
END:VEVENT
BEGIN:VEVENT
SUMMARY:Nikolaos Tziolas (University of Cyprus)
DTSTART;VALUE=DATE-TIME:20200616T153000Z
DTEND;VALUE=DATE-TIME:20200616T163000Z
DTSTAMP;VALUE=DATE-TIME:20201127T091040Z
UID:ZAG/23
DESCRIPTION:Title: Vector fields on canonically polarized surfaces\nby Nik
olaos Tziolas (University of Cyprus) as part of ZAG (Zoom Algebraic Geomet
ry) seminar\n\n\nAbstract\nIn this talk I will present some results about
the geometry of canonically polarized surfaces defined over a field of po
sitive characteristic which have a nontrivial global vector field\, equiva
lently non reduced automorphism scheme\, and the implications that the exi
stence of such surfaces has in the moduli problem of canonically polarized
surfaces.\n
END:VEVENT
BEGIN:VEVENT
SUMMARY:Claire Voisin (Collège de France)
DTSTART;VALUE=DATE-TIME:20200618T140000Z
DTEND;VALUE=DATE-TIME:20200618T150000Z
DTSTAMP;VALUE=DATE-TIME:20201127T091040Z
UID:ZAG/24
DESCRIPTION:Title: Triangle varieties and surface decomposition of hyper-K
ahler manifolds\nby Claire Voisin (Collège de France) as part of ZAG (Zoo
m Algebraic Geometry) seminar\n\n\nAbstract\nIn recent years\, new constru
ctions of complete families of polarized hyper-Kahler manifolds have been
found starting from Fano geometry. These hyper-Kahler manifolds also appea
r as general deformations of Hilbert schemes of K3 surfaces or O'Grady man
ifolds. I will introduce the notion of surface decomposition for a variety
X with a nontrivial Hodge structure on degree 2 cohomology. I will show t
hat this notion is restrictive topologically\, as it implies Beauville-Fuj
iki type relations. I will also show the existence of such a surface deco
mposition for the general hyper-Kahler manifolds mentioned above. This
has interesting consequences on Beauville's conjecture on the Chow ring of
hyper-Kahler manifolds.\n
END:VEVENT
BEGIN:VEVENT
SUMMARY:Alexander Polishchuk (University of Oregon)
DTSTART;VALUE=DATE-TIME:20200623T170000Z
DTEND;VALUE=DATE-TIME:20200623T180000Z
DTSTAMP;VALUE=DATE-TIME:20201127T091040Z
UID:ZAG/25
DESCRIPTION:Title: Hyperelliptic limits of quadrics through canonical curv
es and the super-Schottky locus\nby Alexander Polishchuk (University of Or
egon) as part of ZAG (Zoom Algebraic Geometry) seminar\n\n\nAbstract\nI wi
ll describe joint works with Eric Rains and with Giovanni Felder and David
Kazhdan. The first part will be about a classical topic of quadrics throu
gh canonically embedded curves. We study limiting quadrics as canonical cu
rves approach a hyperelliptic limit. There is a surprizingly simple descri
ption of all such limits. I will also discuss the connection to ribbon cur
ves (which are thickenings of rational normal curves) and to the blow up o
f the moduli space of curves at the hyperelliptic locus. In the second par
t I will talk about the super-period map for supercurves and the calculati
on of its infinitesimal variation. This variation is given by a natural Ma
ssey product that can be defined for any curve with a theta-characteristic
. Combining this with the result of part 1 we get some information about t
he super-Schottky locus.\n
END:VEVENT
BEGIN:VEVENT
SUMMARY:David Mumford (Harvard University and Brown University)
DTSTART;VALUE=DATE-TIME:20200625T150000Z
DTEND;VALUE=DATE-TIME:20200625T160000Z
DTSTAMP;VALUE=DATE-TIME:20201127T091040Z
UID:ZAG/26
DESCRIPTION:Title: A moduli space in the differential geometry world\nby D
avid Mumford (Harvard University and Brown University) as part of ZAG (Zoo
m Algebraic Geometry) seminar\n\n\nAbstract\nThe space of simple closed sm
ooth plane curves is an infinite dimensional manifold and supports a great
diversity of Riemannian metrics. They have very diverse curvature propert
ies and even include universal Teichmuller space. I want to talk in partic
ular about a recent example: modeling 2D waves in water (aka gravity waves
) that some believe explains so-called rogue waves.\nAfter the talk\, we p
lan to have Q&A session at 16:00 GMT. If you have a question for Prof. Mum
ford\, let Ivan Cheltsov know in advance (by e-mail).\n
END:VEVENT
BEGIN:VEVENT
SUMMARY:Izzet Coskun (University of Illinois at Chicago)
DTSTART;VALUE=DATE-TIME:20200630T150000Z
DTEND;VALUE=DATE-TIME:20200630T160000Z
DTSTAMP;VALUE=DATE-TIME:20201127T091040Z
UID:ZAG/27
DESCRIPTION:Title: The stabilization of the cohomology of moduli spaces of
sheaves on surfaces\nby Izzet Coskun (University of Illinois at Chicago)
as part of ZAG (Zoom Algebraic Geometry) seminar\n\n\nAbstract\nThe Betti
numbers of the Hilbert scheme of points on a smooth\, irreducible projecti
ve surface have been computed by Gottsche. These numbers stabilize as the
number of points tends to infinity. In contrast\, the Betti numbers of mod
uli spaces of semistable sheaves on a surface are not known in general. In
joint work with Matthew Woolf\, we conjecture these also stabilize and th
at the stable numbers do not depend on the rank. We verify the conjecture
for large classes of surfaces. I will discuss our conjecture and provide t
he evidence for it.\n
END:VEVENT
BEGIN:VEVENT
SUMMARY:Susanna Zimmermann (Université Angers)
DTSTART;VALUE=DATE-TIME:20200702T100000Z
DTEND;VALUE=DATE-TIME:20200702T110000Z
DTSTAMP;VALUE=DATE-TIME:20201127T091040Z
UID:ZAG/28
DESCRIPTION:Title: Finite quotients of Cremona groups\nby Susanna Zimmerma
nn (Université Angers) as part of ZAG (Zoom Algebraic Geometry) seminar\n
\n\nAbstract\nThe Cremona group is the group of birational self-maps of th
e projective space\, and it is very very big. While in dimension 2 over al
gebraically closed fields there are no finite quotients of this group\, th
ere are many such quotients over non-closed fields and in higher dimension
. I will discuss why this is and how these quotients come up.\n
END:VEVENT
BEGIN:VEVENT
SUMMARY:Ziquan Zhuang (MIT)
DTSTART;VALUE=DATE-TIME:20200707T170000Z
DTEND;VALUE=DATE-TIME:20200707T180000Z
DTSTAMP;VALUE=DATE-TIME:20201127T091040Z
UID:ZAG/29
DESCRIPTION:Title: K-stability of Fano varieties via admissible flags\nby
Ziquan Zhuang (MIT) as part of ZAG (Zoom Algebraic Geometry) seminar\n\n\n
Abstract\nI'll present a general approach to prove the K-stability of expl
icit Fano varieties. Among the applications\, we confirm the existence of
K\\"ahler-Einstein metrics on all smooth Fano hypersurfaces of Fano index
two\, calculate the stability thresholds of some Fano varieties and provid
e a counterexample to the Higher Rank Finite Generation conjecture. Based
on joint work with Hamid Ahmadinezhad.\n
END:VEVENT
BEGIN:VEVENT
SUMMARY:Harold Blum (University of Utah)
DTSTART;VALUE=DATE-TIME:20200709T150000Z
DTEND;VALUE=DATE-TIME:20200709T160000Z
DTSTAMP;VALUE=DATE-TIME:20201127T091040Z
UID:ZAG/30
DESCRIPTION:Title: On properness of K-moduli spaces and destabilizations o
f Fano varieties\nby Harold Blum (University of Utah) as part of ZAG (Zoom
Algebraic Geometry) seminar\n\n\nAbstract\nK-stability is an algebraic no
tion that detects when a smooth Fano variety admits a Kahler-Einstein metr
ic. Recently\, there has been significant progress on constructing moduli
spaces of K-polystable Fano varieties using algebraic methods. One of the
remaining open problems is to show that these moduli spaces are proper. In
this talk\, I will discuss work with Daniel Halpern-Leistner\, Yuchen Liu
\, and Chenyang Xu\, in which we reduce the properness of such K-moduli sp
aces to the existence of certain optimal destabilization of Fano varietie
s.\n
END:VEVENT
BEGIN:VEVENT
SUMMARY:Hélène Esnault (Freie Universität Berlin)
DTSTART;VALUE=DATE-TIME:20200714T140000Z
DTEND;VALUE=DATE-TIME:20200714T150000Z
DTSTAMP;VALUE=DATE-TIME:20201127T091040Z
UID:ZAG/31
DESCRIPTION:Title: Density of arithmetic representations\nby Hélène Esna
ult (Freie Universität Berlin) as part of ZAG (Zoom Algebraic Geometry) s
eminar\n\n\nAbstract\nThe lecture surveys recent work with Moritz Kerz. T
he motivation is the conjecture that the Hard-Lefschetz (HL) property hol
ds on smooth projective varieties defined over algebraically closed char.
$p>0$ fields for cohomology with values in semi-simple $\\ell$-adic loca
l systems $V$. We know it is true if $V$ comes from geometry (Deligne\, Be
ilinson-Bernstein-Deligne-Gabber) by Deligne’s theory of weights. In abs
ence of weights\, we proved it if $V$ has rank $1$ and reduced the whole H
L conjecture to a density conjecture on arithmetic semi-simple $\\ell$-adi
c systems on $P^1$ minus $3$ closed points\, which we can prove in rank $2
$.\n
END:VEVENT
BEGIN:VEVENT
SUMMARY:Matthias Schuett (Leibniz Universität Hannover)
DTSTART;VALUE=DATE-TIME:20200716T153000Z
DTEND;VALUE=DATE-TIME:20200716T163000Z
DTSTAMP;VALUE=DATE-TIME:20201127T091040Z
UID:ZAG/32
DESCRIPTION:Title: Rational curves on Enriques surfaces\, but only few\nby
Matthias Schuett (Leibniz Universität Hannover) as part of ZAG (Zoom Alg
ebraic Geometry) seminar\n\n\nAbstract\nRational curves play a fundamental
role for the structure of an Enriques surface. I will first review the ge
neral theory before focussing on the case of low degree rational curves. T
o this end\, I will discuss joint work with S. Rams (Krakow) which develop
s an explicit sharp bound on the number of rational curves of given degree
relative to the degree of the surface. The proof builds on a general argu
ment in parallel to the case of K3 surfaces which allows us to extend boun
ds of Miyaoka and Degtyarev.\n
END:VEVENT
BEGIN:VEVENT
SUMMARY:Jihun Park (POSTECH)
DTSTART;VALUE=DATE-TIME:20200721T110000Z
DTEND;VALUE=DATE-TIME:20200721T120000Z
DTSTAMP;VALUE=DATE-TIME:20201127T091040Z
UID:ZAG/33
DESCRIPTION:Title: Cayley octads\, plane quartic curves\, Del Pezzo surfac
es of degree 2 and double Veronese cones\nby Jihun Park (POSTECH) as part
of ZAG (Zoom Algebraic Geometry) seminar\n\n\nAbstract\nA net of quadrics
in the 3-dimensional projective space whose singular members are parametri
zed by a smooth plane quartic curve has exactly eight distinct base points
\, called a regular Cayley octad. It is a classical result that there is
a one-to-one correspondence between isomorphism classes of regular Cayley
octads and isomorphism classes of smooth plane quartic curves equipped wi
th even theta-characteristics. We can also easily observe a one-to-one co
rrespondence between isomorphism classes of smooth plane quartic curves an
d isomorphism classes of smooth Del Pezzo surfaces of degree 2. In this ta
lk\, we set up a one-to-one correspondence between isomorphism classes of
smooth plane quartic curves and isomorphism classes of double Veronese con
es with 28-singular points. Also\, we explain how the 36 even theta charac
teristics of a given smooth quartic curve appear in the corresponding doub
le Veronese cone. This is a joint work with Hamid Ahmadinezhad\, Ivan Chel
tsov and Constantin Shramov.\n
END:VEVENT
BEGIN:VEVENT
SUMMARY:Ruadhai Dervan (University of Cambridge)
DTSTART;VALUE=DATE-TIME:20200723T150000Z
DTEND;VALUE=DATE-TIME:20200723T160000Z
DTSTAMP;VALUE=DATE-TIME:20201127T091040Z
UID:ZAG/34
DESCRIPTION:Title: Stability of fibrations\nby Ruadhai Dervan (University
of Cambridge) as part of ZAG (Zoom Algebraic Geometry) seminar\n\n\nAbstra
ct\nThe notion of K-stability of a polarised variety has been heavily stud
ied in recent years\, due to its link both with moduli theory (one should
be able to form moduli spaces of K-stable varieties) and to Kahler geometr
y (K-stability should be equivalent to the existence of a constant scalar
curvature Kahler metric on the variety). This story has been particularly
successful for Fano varieties. I will describe a notion of stability for p
olarised fibrations\, which generalises K-stability of polarised varieties
when the base of the fibration is a point\, and slope stability of a vect
or bundle when the variety is the projectivisation of a vector bundle. I w
ill speculate that one should be able to form moduli spaces of stable fibr
ations\, much as one can form moduli spaces of slope stable vector bundles
over a fixed base. The main result\, however\, will be a description of t
he link with certain canonical metrics on fibrations. This is joint work w
ith Lars Sektnan.\n
END:VEVENT
BEGIN:VEVENT
SUMMARY:Jean-Pierre Demailly (Université Grenoble Alpes)
DTSTART;VALUE=DATE-TIME:20200728T153000Z
DTEND;VALUE=DATE-TIME:20200728T163000Z
DTSTAMP;VALUE=DATE-TIME:20201127T091040Z
UID:ZAG/35
DESCRIPTION:Title: Hermitian-Yang-Mills approach to the conjecture of Grif
fiths on the positivity of ample vector bundles\nby Jean-Pierre Demailly (
Université Grenoble Alpes) as part of ZAG (Zoom Algebraic Geometry) semin
ar\n\n\nAbstract\nGiven a vector bundle of arbitrary rank with ample deter
minant line bundle on a projective manifold\, we propose a new elliptic sy
stem of differential equations of Hermitian-Yang-Mills type for the curvat
ure tensor. The system is designed so that solutions provide Hermitian met
rics with positive curvature in the sense of Griffiths - and even in the s
tronger dual Nakano sense. As a consequence\, if an existence result could
be obtained for every ample vector bundle\, the Griffiths conjecture on
the equivalence between ampleness and positivity of vector bundles would b
e settled. We also discuss a new concept of volume for vector bundles.\n
END:VEVENT
BEGIN:VEVENT
SUMMARY:Ziwen Zhu (University of Utah)
DTSTART;VALUE=DATE-TIME:20200730T150000Z
DTEND;VALUE=DATE-TIME:20200730T163000Z
DTSTAMP;VALUE=DATE-TIME:20201127T091040Z
UID:ZAG/36
DESCRIPTION:Title: Equivariant K-stability under finite group action\nby Z
iwen Zhu (University of Utah) as part of ZAG (Zoom Algebraic Geometry) sem
inar\n\n\nAbstract\nEquivariant K-stability is defined via equivariant tes
t configurations. By definition it is weaker than the usual K-stability an
d for varieties with large symmetry\, it is often easier to check equivari
ant K-stability. For reductive group action\, it is conjectured that equiv
ariant K-polystability implies K-polystability. In this talk\, I will disc
uss recent results about equivariant K-stability and present a proof of th
e conjecture for finite group action. The talk is based on joint work with
Yuchen Liu.\n
END:VEVENT
BEGIN:VEVENT
SUMMARY:Hamid Ahmadinezhad (Loughborough University)
DTSTART;VALUE=DATE-TIME:20200804T140000Z
DTEND;VALUE=DATE-TIME:20200804T150000Z
DTSTAMP;VALUE=DATE-TIME:20201127T091040Z
UID:ZAG/37
DESCRIPTION:Title: Birational geometry of Fano 3-fold hypersurfaces of hig
her index\nby Hamid Ahmadinezhad (Loughborough University) as part of ZAG
(Zoom Algebraic Geometry) seminar\n\n\nAbstract\nI will speak about an app
roach to birational classification of Fano 3-folds\, post MMP. As a part o
f this general guideline\, I will highlight some recent results about bira
tional geometry of Fano hypersurfaces of higher index. The latter is a joi
nt work with Ivan Cheltsov and Jihun Park.\n
END:VEVENT
BEGIN:VEVENT
SUMMARY:Marina Logares (Universidad Complutense de Madrid)
DTSTART;VALUE=DATE-TIME:20200806T150000Z
DTEND;VALUE=DATE-TIME:20200806T160000Z
DTSTAMP;VALUE=DATE-TIME:20201127T091040Z
UID:ZAG/38
DESCRIPTION:Title: Poisson and symplectic geometry of the moduli spaces of
Higgs bundles\nby Marina Logares (Universidad Complutense de Madrid) as p
art of ZAG (Zoom Algebraic Geometry) seminar\n\n\nAbstract\nI will talk ab
out some natural Poisson and symplectic properties of the moduli spaces of
Higgs bundles when some extra structure\, such as a framing\, is added. T
his is an overview of various past and ongoing work with I. Biswas\, J. Ma
rtens\, A. Peón-Nieto and S. Szabó. I will not assume any previous knowl
edge on the subject.\n
END:VEVENT
BEGIN:VEVENT
SUMMARY:Robert Lazarsfeld (Stony Brook University)
DTSTART;VALUE=DATE-TIME:20200811T170000Z
DTEND;VALUE=DATE-TIME:20200811T180000Z
DTSTAMP;VALUE=DATE-TIME:20201127T091040Z
UID:ZAG/39
DESCRIPTION:Title: Cayley-Bacharach theorems and multiplier ideals\nby Rob
ert Lazarsfeld (Stony Brook University) as part of ZAG (Zoom Algebraic Geo
metry) seminar\n\n\nAbstract\nCayley-Bacharach theorems originate in the c
lassical statement if two plane curves of degrees c and d meet in cd poi
nts\, then any curve of degree (c + d - 3) passing through all but one of
these points must also pass through the remaining one. Following work of G
riffiths and Harris in the 1970s\, one now sees this as a special case of
a general result about zero-loci of sections of a vector bundle. I will ex
plain how bringing multiplier ideals into the picture leads (for free) to
a variant that allows for excess vanishing. This is joint work with Lawren
ce Ein.\n
END:VEVENT
BEGIN:VEVENT
SUMMARY:Yuchen Liu (Yale University)
DTSTART;VALUE=DATE-TIME:20200813T150000Z
DTEND;VALUE=DATE-TIME:20200813T160000Z
DTSTAMP;VALUE=DATE-TIME:20201127T091040Z
UID:ZAG/40
DESCRIPTION:Title: On K-stability of cubic hypersurfaces\nby Yuchen Liu (Y
ale University) as part of ZAG (Zoom Algebraic Geometry) seminar\n\n\nAbst
ract\nK-stability of Fano varieties is an algebro-geometric stability cond
ition characterizing the existence of K\\"ahler-Einstein metrics. Recent p
rogress on K-stability suggests that it provides a good moduli theory for
Fano varieties. In this talk\, I will explain how K-moduli spaces can help
us prove K-stability of smooth cubic hypersurfaces in dimension at most 4
\, using a local-to-global volume comparison result. Part of this talk is
based on joint work with Chenyang Xu.\n
END:VEVENT
BEGIN:VEVENT
SUMMARY:Alessio Corti (Imperial College London)
DTSTART;VALUE=DATE-TIME:20200818T170000Z
DTEND;VALUE=DATE-TIME:20200818T180000Z
DTSTAMP;VALUE=DATE-TIME:20201127T091040Z
UID:ZAG/41
DESCRIPTION:Title: Smoothing Gorenstein toric affine 3-folds\nby Alessio
Corti (Imperial College London) as part of ZAG (Zoom Algebraic Geometry) s
eminar\n\n\nAbstract\nI will state a conjecture on the smoothing component
s of the deformation space\, and discuss one or more of the following topi
cs: possible strategies for proving it\, applications to the Fanosearch pr
ogram\, global and higher dimensional analogs. The talk is based on a rece
nt collaboration with Andrea Petracci and Matej Filip.\n
END:VEVENT
BEGIN:VEVENT
SUMMARY:Nicola Pagani (University of Liverpool)
DTSTART;VALUE=DATE-TIME:20200820T150000Z
DTEND;VALUE=DATE-TIME:20200820T160000Z
DTSTAMP;VALUE=DATE-TIME:20201127T091040Z
UID:ZAG/42
DESCRIPTION:Title: Classifying fine compactified universal Jacobians\nby N
icola Pagani (University of Liverpool) as part of ZAG (Zoom Algebraic Geom
etry) seminar\n\n\nAbstract\nWe introduce the notion of a fine compactifie
d Jacobian of a nodal curve\, as an arbitrary compact open subspace of the
moduli space of rank-1 torsion-free simple sheaves. We show that fine com
pactified Jacobians correspond to a certain combinatorial datum\, which is
obtained by only keeping track\, for all sheaves\, of (1) the locus where
it fails to be locally free\, and (2) its multidegree. This notion genera
lizes to flat families of curves\, and so does its combinatorial counterpa
rt. When the family is the universal family over the moduli space of curve
s\, we have the following results: (a) in the absence of marked points\, w
e can fully classify these combinatorial data and deduce that the only fin
e compactified universal Jacobians are the classical ones (which were cons
tructed by Pandharipande and Simpson in the nineties) and (b) in the prese
nce of marked points there are exotic (and new) examples that cannot be ob
tained as compactified universal Jacobians associated to a polarization. T
his is a joint work in progress with Jesse Kass.\n
END:VEVENT
BEGIN:VEVENT
SUMMARY:Christian Boehning (University of Warwick)
DTSTART;VALUE=DATE-TIME:20200825T170000Z
DTEND;VALUE=DATE-TIME:20200825T180000Z
DTSTAMP;VALUE=DATE-TIME:20201127T091040Z
UID:ZAG/43
DESCRIPTION:Title: Rigid\, not infinitesimally rigid surfaces of general t
ype with ample canonical bundle\nby Christian Boehning (University of Warw
ick) as part of ZAG (Zoom Algebraic Geometry) seminar\n\n\nAbstract\nIn th
e talk I will report on work in progress\, joint with Roberto Pignatelli a
nd Hans-Christian von Bothmer\, that concerns the construction of surfaces
of general type with ample canonical bundle and Kuranishi space (and poss
ibly also Gieseker moduli space) a non-reduced point. The main tools are c
onfigurations of lines and their incidence schemes as well as the theory o
f abelian covers due to Pardini and others.\n
END:VEVENT
BEGIN:VEVENT
SUMMARY:Robert Berman (Chalmers University of Technology)
DTSTART;VALUE=DATE-TIME:20200827T100000Z
DTEND;VALUE=DATE-TIME:20200827T110000Z
DTSTAMP;VALUE=DATE-TIME:20201127T091040Z
UID:ZAG/44
DESCRIPTION:Title: Kahler-Einstein metrics\, Archimedean Zeta functions an
d phase transitions\nby Robert Berman (Chalmers University of Technology)
as part of ZAG (Zoom Algebraic Geometry) seminar\n\n\nAbstract\nWhile the
existence of a unique Kahler-Einstein metrics on a canonically polarized m
anifold X was established already in the seventies there are very few expl
icit formulas available (even in the case of complex curves!). In this tal
k I will give a non-technical introduction to a probabilistic approach to
Kahler-Einstein metrics\, which\, in particular\, yields canonical approxi
mations of the Kahler-Einstein metric on X. The approximating metrics in q
uestion are expressed as explicit period integrals and the conjectural ext
ension to the case of a Fano variety leads to some intriguing connections
with Zeta functions and the theory of phase transitions in statistical mec
hanics.\n
END:VEVENT
BEGIN:VEVENT
SUMMARY:Jarod Alper (University of Washington)
DTSTART;VALUE=DATE-TIME:20200903T170000Z
DTEND;VALUE=DATE-TIME:20200903T180000Z
DTSTAMP;VALUE=DATE-TIME:20201127T091040Z
UID:ZAG/46
DESCRIPTION:Title: Advances in moduli theory\nby Jarod Alper (University o
f Washington) as part of ZAG (Zoom Algebraic Geometry) seminar\n\n\nAbstra
ct\nWe will survey how recent advances in moduli theory allow for a new te
chnique to construct projective moduli spaces of objects with potentially
non-finite automorphism groups such as sheaves\, complexes or Fano varieti
es. We will primarily explore this technique through the lens of the mod
uli space of vector bundles over a smooth curve where the definitions and
concepts are most readily internalized. Time permitting\, we will discuss
applications to Bridgeland stability and perhaps how this construction te
chnique\, which works now only in characteristic zero\, can be generalized
to positive characteristic.\n
END:VEVENT
BEGIN:VEVENT
SUMMARY:Andreas Höring (Université Côte d'Azur)
DTSTART;VALUE=DATE-TIME:20200908T100000Z
DTEND;VALUE=DATE-TIME:20200908T110000Z
DTSTAMP;VALUE=DATE-TIME:20201127T091040Z
UID:ZAG/47
DESCRIPTION:Title: Fano manifolds such that the tangent bundle is (not) bi
g\nby Andreas Höring (Université Côte d'Azur) as part of ZAG (Zoom Alge
braic Geometry) seminar\n\n\nAbstract\nLet X be a Fano manifold. While the
properties of the anticanonical divisor -KX and its multiples have been s
tudied by many authors\, the positivity of the tangent bundle TX is much m
ore elusive. We give a complete characterisation of the pseudoeffectivity
of TX for del Pezzo surfaces\, hypersurfaces in the projective space and d
el Pezzo threefolds. This is joint work with Jie Liu and Feng Shao.\n
END:VEVENT
BEGIN:VEVENT
SUMMARY:Joaquín Moraga (Princeton University)
DTSTART;VALUE=DATE-TIME:20200910T150000Z
DTEND;VALUE=DATE-TIME:20200910T160000Z
DTSTAMP;VALUE=DATE-TIME:20201127T091040Z
UID:ZAG/48
DESCRIPTION:Title: Topology and geometry of Kawamata log terminal singular
ities\nby Joaquín Moraga (Princeton University) as part of ZAG (Zoom Alge
braic Geometry) seminar\n\n\nAbstract\nIn this talk\, we will discuss the
topology of Kawamata log terminal singularities. We show that from the per
spective of the fundamental group klt singularities are close to quotient
singularities. For instance\, the regional fundamental group of a klt sing
ularity of dimension n contains a normal abelian subgroup of rank at most
n and index at most c(n). Then\, we proceed to study geometric implication
s of the topology of klt singularities. We give a characterization theorem
in the case that the abelian part of the fundamental group is large of fu
ll rank.\n
END:VEVENT
BEGIN:VEVENT
SUMMARY:Julie Rana (Lawrence University)
DTSTART;VALUE=DATE-TIME:20200915T150000Z
DTEND;VALUE=DATE-TIME:20200915T160000Z
DTSTAMP;VALUE=DATE-TIME:20201127T091040Z
UID:ZAG/49
DESCRIPTION:Title: Singularities and divisors in the moduli space of surfa
ces\nby Julie Rana (Lawrence University) as part of ZAG (Zoom Algebraic Ge
ometry) seminar\n\n\nAbstract\nThe KSBA moduli space of stable surfaces (s
urfaces with slc singularities and ample canonical class) is a natural com
pactification of Gieseker's moduli space of surfaces of general type. In c
ontrast with the moduli space of curves\, very little is known about the b
irational geometry of KSBA moduli spaces\; indeed\, there are very few exa
mples of divisors in KSBA moduli spaces. I will give an example of a divis
or in the moduli space of quintic surfaces corresponding to surfaces with
cyclic quotient singularities. I also discuss joint work with Giancarlo Ur
z\\'ua where we give bounds that help to narrow the search.\n
END:VEVENT
BEGIN:VEVENT
SUMMARY:Anthony Varilly-Alvarado (Rice University)
DTSTART;VALUE=DATE-TIME:20200527T150000Z
DTEND;VALUE=DATE-TIME:20200527T160000Z
DTSTAMP;VALUE=DATE-TIME:20201127T091040Z
UID:ZAG/50
DESCRIPTION:Title: Rational curves on K3 surfaces\nby Anthony Varilly-Alva
rado (Rice University) as part of ZAG (Zoom Algebraic Geometry) seminar\n\
nAbstract: TBA\n
END:VEVENT
BEGIN:VEVENT
SUMMARY:Jean-Louis Colliot-Thelene (Université Paris-Sud)
DTSTART;VALUE=DATE-TIME:20200922T140000Z
DTEND;VALUE=DATE-TIME:20200922T150000Z
DTSTAMP;VALUE=DATE-TIME:20201127T091040Z
UID:ZAG/51
DESCRIPTION:Title: Zero-cycles on del Pezzo surfaces\nby Jean-Louis Collio
t-Thelene (Université Paris-Sud) as part of ZAG (Zoom Algebraic Geometry)
seminar\n\n\nAbstract\nLet k be an arbitary field of characteristic zero
and X be a smooth\, projective\, geometrically rational surface. Birationa
l classification of such surfaces (over k) is due to Enriques\, Manin\, Is
kovskikh\, Mori. We are interested in zero-cycles on such surfaces. In 197
4\, Daniel Coray showed that on a smooth cubic surface X with a closed po
int of degree prime to 3 there exists a closed point of degree 1\, 4 or 10
. Whether 4 and 10 may be omitted is still an open question. We first show
how a combination of generisation\, specialisation\, Bertini theorems and
"large" fields avoids considerations of special cases in Coray's argumen
t. For smooth cubic surfaces X with a rational point\, we show that any ze
ro-cycle of degree at least 10 is rationally equivalent to an effective cy
cle. We establish analogues of these results for del Pezzo surfaces X of d
egree 2 and of degree 1. This completes the proof that for any geometrical
ly rational surface X with a rational point\, there exists an integer N w
hich depends only on the geometry of the surface\, such that any zero-cyc
le of degree at least N is rationally equivalent to an effective zero-cycl
e. For smooth cubic surfaces X without a rational point\, we relate the qu
estion whether there exists a degree 3 point which is not on a line to the
question whether rational points are dense on a del Pezzo surface of degr
ee 1.\n
END:VEVENT
BEGIN:VEVENT
SUMMARY:Alan Thompson (Loughborough University)
DTSTART;VALUE=DATE-TIME:20200924T150000Z
DTEND;VALUE=DATE-TIME:20200924T160000Z
DTSTAMP;VALUE=DATE-TIME:20201127T091040Z
UID:ZAG/52
DESCRIPTION:Title: Mirror symmetry for fibrations and degenerations\nby Al
an Thompson (Loughborough University) as part of ZAG (Zoom Algebraic Geome
try) seminar\n\n\nAbstract\nIn a 2004 paper\, Tyurin briefly hinted at a n
ovel relationship between Calabi-Yau mirror symmetry and the Fano-LG corre
spondence. More specifically\, if one can degenerate a Calabi-Yau manifold
to a pair of (quasi-)Fanos\, then one expects to be able to express the m
irror Calabi-Yau in terms of the corresponding Landau-Ginzburg models. Som
e details of this correspondence were worked out by C. F. Doran\, A. Harde
r\, and I in a 2017 paper\, but much remains mysterious. In this talk I wi
ll describe recent attempts to better understand this picture\, and how it
hints at a broader mirror symmetric correspondence between degeneration a
nd fibration structures. As an example of this correspondence\, I will dis
cuss the question of finding mirrors to certain exact sequences which desc
ribe the Hodge theory of degenerations. The material in this talk is joint
work in progress with C. F. Doran.\n
END:VEVENT
BEGIN:VEVENT
SUMMARY:Yuri Zarhin (Penn State University)
DTSTART;VALUE=DATE-TIME:20200929T140000Z
DTEND;VALUE=DATE-TIME:20200929T150000Z
DTSTAMP;VALUE=DATE-TIME:20201127T091040Z
UID:ZAG/53
DESCRIPTION:Title: Jordan properties of automorphism groups of algebraic v
arieties and complex manifolds\nby Yuri Zarhin (Penn State University) as
part of ZAG (Zoom Algebraic Geometry) seminar\n\n\nAbstract\nA classical t
heorem of Jordan asserts that each finite subgroup of the complex general
linear group GL(n) is "almost commutative": it contains a commutative nor
mal subgroup with index bounded by an universal constant that depends only
on n. We discuss an analogue of this property for the groups of birationa
l (and biregular) automorphisms of complex algebraic varieties and the gr
oups of bimeromorphic automorphisms of compact complex manifolds.\n
END:VEVENT
BEGIN:VEVENT
SUMMARY:Burt Totaro (UCLA)
DTSTART;VALUE=DATE-TIME:20201001T160000Z
DTEND;VALUE=DATE-TIME:20201001T170000Z
DTSTAMP;VALUE=DATE-TIME:20201127T091040Z
UID:ZAG/54
DESCRIPTION:Title: The Hilbert scheme of points on affine space\nby Burt T
otaro (UCLA) as part of ZAG (Zoom Algebraic Geometry) seminar\n\n\nAbstrac
t\nI will discuss the Hilbert scheme of d points in affine n-space\, with
some examples. This space has many irreducible components for n at least 3
and has been poorly understood. For n greater than d\, we determine the h
omotopy type of the Hilbert scheme in a range of dimensions. Many question
s remain. (Joint with Marc Hoyois\, Joachim Jelisiejew\, Denis Nardin\, Ma
ria Yakerson.)\n
END:VEVENT
BEGIN:VEVENT
SUMMARY:Junliang Shen (MIT)
DTSTART;VALUE=DATE-TIME:20201006T160000Z
DTEND;VALUE=DATE-TIME:20201006T170000Z
DTSTAMP;VALUE=DATE-TIME:20201127T091040Z
UID:ZAG/55
DESCRIPTION:Title: Cohomology of the moduli of Higgs bundles and the Hause
l-Thaddeus conjecture\nby Junliang Shen (MIT) as part of ZAG (Zoom Algebra
ic Geometry) seminar\n\n\nAbstract\nWe describe the cohomological structur
e of the moduli space of stable SL_n Higgs bundles on a curve following th
e topological mirror symmetry conjecture of Hausel-Thaddeus. For the appro
ach\, we establish a connection between:\n(a) the moduli space of twisted
Higgs bundles by an effective divisor of degree greater than 2g-2\, and\n(
b) the moduli space of K_C-Higgs bundles\,\nusing vanishing cycle functors
. This allows us to apply Ngo's support theorem\, which has a simpler form
in the case (a) (by Ngo\, Chaudouard-Laumon\, de Cataldo)\, to the case o
f (b) which concerns hyper-Kähler geometries. In particular\, this gives
a new proof of the Hausel-Thaddeus conjecture proven previously by Gröche
nig-Wyss-Ziegler via p-adic integrations. Based on joint work with Davesh
Maulik.\n
END:VEVENT
BEGIN:VEVENT
SUMMARY:Timothy Logvinenko (Cardiff University)
DTSTART;VALUE=DATE-TIME:20201008T153000Z
DTEND;VALUE=DATE-TIME:20201008T163000Z
DTSTAMP;VALUE=DATE-TIME:20201127T091040Z
UID:ZAG/56
DESCRIPTION:Title: Skein-triangulated representations of generalised braid
s\nby Timothy Logvinenko (Cardiff University) as part of ZAG (Zoom Algebra
ic Geometry) seminar\n\n\nAbstract\nOrdinary braid group Br_n is a well-kn
own algebraic structure which encodes configurations of n non-touching str
ands (“braids”) up to continious transformations (“isotopies”). A
classical result of Khovanov and Thomas states that there is a natural cat
egorical action of Br_n on the derived category of the cotangent bundle of
the variety of complete flags in C^n.\nIn this talk\, I will introduce a
new structure: the category GBr_n of generalised braids. These are the bra
ids whose strands are allowed to touch in a certain way. They have multipl
e endpoint configurations and can be non-invertible\, thus forming a categ
ory rather than a group. In the context of triangulated categories\, it is
natural to impose certain relations which result in the notion of a skein
-triangulated representation of GBr_n.\nA decade-old conjecture states tha
t there a skein-triangulated action of GBr_n on the cotangent bundles of t
he varieties of full and partial flags in C^n. We prove this conjecture fo
r n = 3. We also show that any categorical action of Br_n can be lifted to
a skein-triangulated action of GBr_n\, which behaves like a categorical n
il Hecke algebra. This is a joint work with Rina Anno and Lorenzo De Biase
.\n
END:VEVENT
BEGIN:VEVENT
SUMMARY:Ana-Maria Castravet (Université de Versailles St-Quentin-en-Yveli
nes)
DTSTART;VALUE=DATE-TIME:20201013T140000Z
DTEND;VALUE=DATE-TIME:20201013T150000Z
DTSTAMP;VALUE=DATE-TIME:20201127T091040Z
UID:ZAG/57
DESCRIPTION:Title: Blown-up toric surfaces with non-polyhedral effective c
one\nby Ana-Maria Castravet (Université de Versailles St-Quentin-en-Yveli
nes) as part of ZAG (Zoom Algebraic Geometry) seminar\n\n\nAbstract\nI wil
l report on recent joint work with Antonio Laface\, Jenia Tevelev and Luca
Ugaglia.\nWe construct examples of projective toric surfaces whose blow-u
p at a general point has a\nnon-polyhedral pseudoeffective cone\, both in
characteristic 0 and in prime characteristic.\nAs a consequence\, we prove
that the pseudo-effective cone of the Grothendieck-Knudsen moduli space o
f stable\, n-pointed\, rational stable curves\, is not polyhedral if\nn>=
10 in characteristic 0 and in positive characteristic for an infinite set
of primes of positive density.\nIn particular\, these moduli spaces are no
t Mori dream spaces even in positive characteristic.\n
END:VEVENT
BEGIN:VEVENT
SUMMARY:Sandra Di Rocco (KTH)
DTSTART;VALUE=DATE-TIME:20201015T140000Z
DTEND;VALUE=DATE-TIME:20201015T150000Z
DTSTAMP;VALUE=DATE-TIME:20201127T091040Z
UID:ZAG/58
DESCRIPTION:Title: Algebraic Geometry of Data\nby Sandra Di Rocco (KTH) as
part of ZAG (Zoom Algebraic Geometry) seminar\n\n\nAbstract\nIt is often
convenient to visualise algebraic varieties (and hence systems of polynomi
al equations) by sampling. The key challenge is to have the right distrib
ution and density in order to recover the shape\, i.e the topology of the
variety. Bottlenecks are pairs of points on the variety joined by a line w
hich is normal to the variety at both points. These points play a special
role in determining the appropriate density of a point-sample. Under suita
ble genericity assumptions the number of bottlenecks of an affine variety
is finite and we call it the bottleneck degree. We show that it is determi
ned by (classical) invariants of the variety\, i.e. polar classes. The tal
k is based on joint work with D. Eklund and M. Weinstein.\n
END:VEVENT
BEGIN:VEVENT
SUMMARY:Gergely Berczi (Aarhus University)
DTSTART;VALUE=DATE-TIME:20201020T150000Z
DTEND;VALUE=DATE-TIME:20201020T160000Z
DTSTAMP;VALUE=DATE-TIME:20201127T091040Z
UID:ZAG/59
DESCRIPTION:Title: Non-reductive group actions and hyperbolicity\nby Gerge
ly Berczi (Aarhus University) as part of ZAG (Zoom Algebraic Geometry) sem
inar\n\n\nAbstract\nNon-reductive reparametrisation group actions play cen
tral role in hyperbolicity questions. Using recently developed intersectio
n theory on non-reductive geometric invariant theory-type quotients and fo
llowing the strategy of Demailly\, Siu et al\, last year we completed a pr
oof of the Green-Griffiths-Lang and Kobayashi hyperbolicity conjectures fo
r generic hypersurfaces of polynomial degree. We explain elements of the p
roof. Joint work with F. Kirwan.\n
END:VEVENT
BEGIN:VEVENT
SUMMARY:David Mumford (Harvard University and Brown University)
DTSTART;VALUE=DATE-TIME:20200625T160000Z
DTEND;VALUE=DATE-TIME:20200625T170000Z
DTSTAMP;VALUE=DATE-TIME:20201127T091040Z
UID:ZAG/60
DESCRIPTION:Title: Q&A with legendary geometers: David Mumford\nby David M
umford (Harvard University and Brown University) as part of ZAG (Zoom Alge
braic Geometry) seminar\n\n\nAbstract\nQ&A with David Mumford (please\, no
algebraic geometry questions). If you want to ask a question you should e
-mail it in advance to i.cheltsov@ed.ac.uk\n
END:VEVENT
BEGIN:VEVENT
SUMMARY:Christian Liedtke (Technical University of Munich)
DTSTART;VALUE=DATE-TIME:20200917T150000Z
DTEND;VALUE=DATE-TIME:20200917T160000Z
DTSTAMP;VALUE=DATE-TIME:20201127T091040Z
UID:ZAG/61
DESCRIPTION:Title: Rational curves on K3 surfaces\nby Christian Liedtke (T
echnical University of Munich) as part of ZAG (Zoom Algebraic Geometry) se
minar\n\n\nAbstract\nWe prove that every complex projective K3 surface con
tains infinitely rational curves\, which confirms a folklore conjecture on
K3 surfaces. This was previously known for elliptic K3 surfaces (Bogomolo
v-Tschinkel)\, for very general K3 surfaces (Chen)\, as well as for K3 sur
faces of odd Picard rank (Bogomolov-Hassett-Tschinkel\, Li-Liedtke). We fi
nish this conjecture by introducing two new techniques: “regeneration”
(a sort of converse to degeneration) and the “marked point trick” (a
technique for controlled degenerations)\, which allows to treat the missin
g cases. This is joint work with Xi Chen and Frank Gounelas.\n
END:VEVENT
BEGIN:VEVENT
SUMMARY:Alexander Borisov (Binghamton University)
DTSTART;VALUE=DATE-TIME:20201022T150000Z
DTEND;VALUE=DATE-TIME:20201022T160000Z
DTSTAMP;VALUE=DATE-TIME:20201127T091040Z
UID:ZAG/62
DESCRIPTION:Title: Projective geometry approach to Jacobian Conjecture\nby
Alexander Borisov (Binghamton University) as part of ZAG (Zoom Algebraic
Geometry) seminar\n\n\nAbstract\nacobian Conjecture is one of the oldest u
nsolved problems in Algebraic Geometry\, going back to a 1939 paper by Kel
ler. It is infamous for the large number of incorrect proofs that have bee
n proposed over the years. In fact\, it is quite possible that the conject
ure is false\, especially in higher dimensions. For the past 10-15 years I
have been making slow but steady progress in understanding this enigma in
dimension two\, using classical methods of algebraic geometry of projecti
ve surfaces and some inspiration from the Minimal Model Program. I will ex
plain my approach and where it has led me\, and will also discuss some rel
ated conjectures.\n
END:VEVENT
BEGIN:VEVENT
SUMMARY:Daniel Greb (University of Duisburg-Essen)
DTSTART;VALUE=DATE-TIME:20201027T160000Z
DTEND;VALUE=DATE-TIME:20201027T170000Z
DTSTAMP;VALUE=DATE-TIME:20201127T091040Z
UID:ZAG/63
DESCRIPTION:Title: Projective flatness over klt spaces and uniformisation
of varieties with nef anti-canonical divisor\nby Daniel Greb (University o
f Duisburg-Essen) as part of ZAG (Zoom Algebraic Geometry) seminar\n\n\nAb
stract\nI will discuss a criterion for the projectivisation of a reflexive
sheaf on a klt space to be induced by a projective representation of the
fundamental group of the smooth locus. This criterion is then applied to g
ive a characterisation of finite quotients of projective spaces and Abelia
n varieties by Q-Chern class (in)equalities and a suitable stability condi
tion. This stability condition is formulated in terms of a naturally defin
ed extension of the tangent sheaf by the structure sheaf. I will further e
xamine cases in which this stability condition is satisfied\, comparing it
to K-semistability and related notions. This is joint work with Stefan Ke
bekus and Thomas Peternell.\n
END:VEVENT
BEGIN:VEVENT
SUMMARY:Junyan Cao (Université Côte d'Azur)
DTSTART;VALUE=DATE-TIME:20201029T140000Z
DTEND;VALUE=DATE-TIME:20201029T150000Z
DTSTAMP;VALUE=DATE-TIME:20201127T091040Z
UID:ZAG/64
DESCRIPTION:Title: On the Ohsawa-Takegoshi extension theorem\nby Junyan Ca
o (Université Côte d'Azur) as part of ZAG (Zoom Algebraic Geometry) semi
nar\n\n\nAbstract\nAbstract: Since it was established\, the Ohsawa-Takegos
hi extension theorem turned out to be a fundamental tool in complex geomet
ry. We establish a new extension result for twisted canonical forms define
d on a hypersurface with simple normal crossings of a projective manifold
with a control on its L^2 norme. It is a joint work with Mihai Paun.\n
END:VEVENT
BEGIN:VEVENT
SUMMARY:Bianca Viray (University of Washington)
DTSTART;VALUE=DATE-TIME:20201103T170000Z
DTEND;VALUE=DATE-TIME:20201103T180000Z
DTSTAMP;VALUE=DATE-TIME:20201127T091040Z
UID:ZAG/65
DESCRIPTION:Title: On quadratic points on intersections of two quadrics\nb
y Bianca Viray (University of Washington) as part of ZAG (Zoom Algebraic G
eometry) seminar\n\n\nAbstract\nSpringer's theorem and the Amer-Brumer the
orem together imply that intersections of two quadrics have a rational poi
nt if and only if they have a 0-cycle of degree 1. In this talk\, we cons
ider whether this statement can be strengthened in the case when there is
no rational point\, namely when 1) the least degree of a 0-cycle can be 2\
, and 2) when this occurs\, whether there is an effective 0-cycle of degre
e 2. We report on results in this direction\, paying particular attention
to the case of local and global fields. This is joint work with Brendan
Creutz.\n
END:VEVENT
BEGIN:VEVENT
SUMMARY:Cristiano Spotti (Aarhus University)
DTSTART;VALUE=DATE-TIME:20201105T130000Z
DTEND;VALUE=DATE-TIME:20201105T140000Z
DTSTAMP;VALUE=DATE-TIME:20201127T091040Z
UID:ZAG/66
DESCRIPTION:Title: Geometric aspects of Kaehler-Einstein metrics on klt pa
irs\nby Cristiano Spotti (Aarhus University) as part of ZAG (Zoom Algebrai
c Geometry) seminar\n\n\nAbstract\nIn this talk I will discuss about the e
xistence and geometric properties (e.g.\, tangent cones asymptotics\, metr
ic degenerations\, etc...) of conical Kähler-Einstein metrics on klt pair
s.\n
END:VEVENT
BEGIN:VEVENT
SUMMARY:Aleksandr Pukhlikov (University of Liverpool)
DTSTART;VALUE=DATE-TIME:20201110T150000Z
DTEND;VALUE=DATE-TIME:20201110T160000Z
DTSTAMP;VALUE=DATE-TIME:20201127T091040Z
UID:ZAG/67
DESCRIPTION:Title: Rationally connected rational double covers of primitiv
e Fano varieties\nby Aleksandr Pukhlikov (University of Liverpool) as part
of ZAG (Zoom Algebraic Geometry) seminar\n\n\nAbstract\nWe show that for
a Zariski general hypersurface $V$ of degree $M+1$ in ${\\mathbb P}^{M+1}$
for $M\\geqslant 5$ there are no Galois rational covers $X\\dashrightarro
w V$ with an abelian Galois group\, where $X$ is a rationally connected va
riety. In particular\, there are no rational maps $X\\dashrightarrow V$ of
degree 2 with $X$ rationally connected. This fact is true for many other
families of primitive Fano varieties as well and motivates a conjecture on
absolute rigidity of primitive Fano varieties.\n
END:VEVENT
BEGIN:VEVENT
SUMMARY:Jürgen Hausen (University of Tübingen)
DTSTART;VALUE=DATE-TIME:20201112T160000Z
DTEND;VALUE=DATE-TIME:20201112T170000Z
DTSTAMP;VALUE=DATE-TIME:20201127T091040Z
UID:ZAG/68
DESCRIPTION:Title: Automorphisms of k*-surfaces\nby Jürgen Hausen (
University of Tübingen) as part of ZAG (Zoom Algebraic Geometry) seminar\
n\n\nAbstract\nAfter recalling the necessary background on k*-surfaces\, w
e give a complete description of the automorhpism group of a non-toric rat
ional normal projective k*-surface in terms of isotropy group orders and s
elf intersection numbers of suitable invariant curves. We also discuss the
basic ingredients and ideas of the proof.\n
END:VEVENT
BEGIN:VEVENT
SUMMARY:Michela Artebani (Universidad de Concepcion)
DTSTART;VALUE=DATE-TIME:20201117T150000Z
DTEND;VALUE=DATE-TIME:20201117T160000Z
DTSTAMP;VALUE=DATE-TIME:20201127T091040Z
UID:ZAG/69
DESCRIPTION:Title: Cox rings of K3 surfaces\nby Michela Artebani (Universi
dad de Concepcion) as part of ZAG (Zoom Algebraic Geometry) seminar\n\n\nA
bstract\nGiven a normal complex projective variety X with finitely generat
ed divisor class group\, its Cox ring R(X) is the Cl(X)-graded algebra who
se homogeneous pieces are Riemann-Roch spaces of divisors of X. This objec
t is particularly interesting when it is finitely generated\, since in suc
h case X can be obtained as a GIT quotient of an open subset of Spec R(X)
by the action of a quasi-torus [1]. Finding a presentation or even a minim
al generating set for R(X) is in general a difficult problem\, already in
the case of surfaces. In this talk\, after an introduction to the subject\
, we will concentrate on complex projective K3 surfaces\, which are known
to have finitely generated Cox ring exactly when their automorphism group
is finite [2]. We show that the Cox ring can be generated by homogeneous e
lements whose degrees are either classes of (-2)-curves\, sums of at most
three elements in the Hilbert basis of the nef cone\, or classes of diviso
rs of the form 2(E+E')\, where E\,E' are elliptic curves with E.E'=2. As a
n application\, we compute Cox rings of Mori dream K3 surfaces of Picard n
umber 3 and 4. This is joint work with C. Correa Deisler\, A. Laface and X
. Roulleau [3\,4].\n\nReferences.\n[1] I. Arzhantsev\, U. Derenthal\, J. H
ausen\, and A. Laface\, Cox rings\, Cambridge Studies in Advanced Mathemat
ics\, vol. 144\, Cambridge University Press\, Cambridge\, 2015.\n[2] M. Ar
tebani\, J. Hausen\, and A. Laface\, On Cox rings of K3 surfaces\, Compos.
Math. 146 (2010)\, no. 4\, 964–998. arXiv:0901.0369\n[3] M. Artebani\,
C. Correa Deisler\, and A. Laface\, Cox rings of K3 surfaces of Picard num
ber three\, J. Algebra 565C (2021)\, 598–626. arXiv:1909.01267\n[4] M. A
rtebani\, C. Correa Deisler\, and X. Roulleau\, Mori dream K3 surfaces of
Picard number four: projective models and Cox rings. arXiv:2011.00475.\n
END:VEVENT
BEGIN:VEVENT
SUMMARY:Yukari Ito (Kavli IPMU)
DTSTART;VALUE=DATE-TIME:20201119T100000Z
DTEND;VALUE=DATE-TIME:20201119T110000Z
DTSTAMP;VALUE=DATE-TIME:20201127T091040Z
UID:ZAG/70
DESCRIPTION:Title: The McKay correspondence\nby Yukari Ito (Kavli IPMU) as
part of ZAG (Zoom Algebraic Geometry) seminar\n\n\nAbstract\nThe original
McKay correspondence was observed by John McKay as a correspondence betwe
en a finite subgroup G of SL(2\,C) and simple Lie algebra in representatio
n theory and developed as a correspondence between the group G and the min
imal resolution of the quotient singularity C^2/G in algebraic geometry. I
n this talk\, I will introduce the McKay correspondence in dimension three
and show recent progress and open problems.\n
END:VEVENT
BEGIN:VEVENT
SUMMARY:Kazushi Ueda (University of Tokyo)
DTSTART;VALUE=DATE-TIME:20201124T100000Z
DTEND;VALUE=DATE-TIME:20201124T110000Z
DTSTAMP;VALUE=DATE-TIME:20201127T091040Z
UID:ZAG/71
DESCRIPTION:Title: Noncommutative del Pezzo surfaces\nby Kazushi Ueda (Uni
versity of Tokyo) as part of ZAG (Zoom Algebraic Geometry) seminar\n\n\nAb
stract\nAbstract: We introduce the notion of noncommutative del Pezzo surf
aces\, and show that a collection of 12-d general vector bundles of certai
n ranks and degrees on an elliptic curve produces a noncommutative del Pez
zo surface of degree d. We also define the moduli stack of marked noncommu
tative del Pezzo surfaces\, and show that it contains the configuration sp
ace of 9-d points in general position on the projective plane as a locally
closed substack. This is a joint work in progress with Tarig Abdelgadir a
nd Shinnosuke Okawa.\n
END:VEVENT
BEGIN:VEVENT
SUMMARY:Yuji Odaka (Kyoto University)
DTSTART;VALUE=DATE-TIME:20201126T100000Z
DTEND;VALUE=DATE-TIME:20201126T110000Z
DTSTAMP;VALUE=DATE-TIME:20201127T091040Z
UID:ZAG/72
DESCRIPTION:Title: On compactifying moduli and degenerations of K-trivial
varieties\nby Yuji Odaka (Kyoto University) as part of ZAG (Zoom Algebraic
Geometry) seminar\n\n\nAbstract\nSome background review: the KSBA moduli
of varieties of ample canonical classes is interpreted via K-stability res
p.\, KE metrics (O’10\, resp.\, Berman-Guenancia’13). A recent trend s
ince 2012 is to establish its Fano analogue\, and study their K-stability
itself\, which still continues to be developed by more and more contributo
rs wonderfully. Luckily\, in both cases\, K-polystable / KE varieties (sho
uld) form projective (compact) moduli schemes.\nHowever\, nevertheless of
general K-moduli expectation\, such existence of projective moduli of K-po
lystable/cscK (polarized) varieties is NOT true “at the boundary”\, ev
en for classical K-trivial / Calabi-Yau cases. Indeed\, as a general theor
y\, no “canonical” algebro-geometric compactification theory of moduli
of polarized CY vars seems established. E.g. An idea pursued and fairly d
eveloped is to attach ample extra divisors on the CY vars (to pass to “K
:ample”-like situations) and take their “log KSBA” compactifications
\, but different choice of the extra divisors can lead to different log KS
BA compactifications.\nIn our talk\, based on our several recent papers (p
artially j.w.w. Yoshiki Oshima)\, we discuss the possibilities of still ge
tting “canonical (geometric) compactifications” of the moduli of pola
rized K-trivial / CY varieties and corresponding "canonical limits"\, esp
ecially giving more explicit conjectures in hyperKahler / K3 case\, with c
ertain confirmations. This involves not only classical AG but also DG of c
ollapsing CY metrics\, symmetric space theory (Lie\, Cartan\, .. Satake..)
\, non-archimedean/tropical geometry\, and some mirror symmetric phenomena
. Examples and pictures will be used for the illustration.\n
END:VEVENT
BEGIN:VEVENT
SUMMARY:Takuzo Okada (Saga University)
DTSTART;VALUE=DATE-TIME:20201201T100000Z
DTEND;VALUE=DATE-TIME:20201201T110000Z
DTSTAMP;VALUE=DATE-TIME:20201127T091040Z
UID:ZAG/73
DESCRIPTION:by Takuzo Okada (Saga University) as part of ZAG (Zoom Algebra
ic Geometry) seminar\n\nInteractive livestream: https://us02web.zoom.us/j/
9918493831\nAbstract: TBA\n
URL:https://us02web.zoom.us/j/9918493831
END:VEVENT
BEGIN:VEVENT
SUMMARY:Hulya Arguz (Versailles Saint-Quentin-en-Yvelines University)
DTSTART;VALUE=DATE-TIME:20201203T130000Z
DTEND;VALUE=DATE-TIME:20201203T140000Z
DTSTAMP;VALUE=DATE-TIME:20201127T091040Z
UID:ZAG/74
DESCRIPTION:by Hulya Arguz (Versailles Saint-Quentin-en-Yvelines Universit
y) as part of ZAG (Zoom Algebraic Geometry) seminar\n\nInteractive livestr
eam: https://us02web.zoom.us/j/9918493831\nAbstract: TBA\n
URL:https://us02web.zoom.us/j/9918493831
END:VEVENT
BEGIN:VEVENT
SUMMARY:Keiji Oguiso (University of Tokyo)
DTSTART;VALUE=DATE-TIME:20201208T110000Z
DTEND;VALUE=DATE-TIME:20201208T120000Z
DTSTAMP;VALUE=DATE-TIME:20201127T091040Z
UID:ZAG/75
DESCRIPTION:by Keiji Oguiso (University of Tokyo) as part of ZAG (Zoom Alg
ebraic Geometry) seminar\n\nInteractive livestream: https://us02web.zoom.u
s/j/9918493831\nAbstract: TBA\n
URL:https://us02web.zoom.us/j/9918493831
END:VEVENT
BEGIN:VEVENT
SUMMARY:Artan Sheshmani (Harvard University Center for Mathematical scienc
es and Applications)
DTSTART;VALUE=DATE-TIME:20201210T150000Z
DTEND;VALUE=DATE-TIME:20201210T160000Z
DTSTAMP;VALUE=DATE-TIME:20201127T091040Z
UID:ZAG/76
DESCRIPTION:Title: DT invariants from Gerstenhaber-BV structures\, and deg
eneration technique\nby Artan Sheshmani (Harvard University Center for Mat
hematical sciences and Applications) as part of ZAG (Zoom Algebraic Geomet
ry) seminar\n\nInteractive livestream: https://us02web.zoom.us/j/991849383
1\nAbstract: TBA\n
URL:https://us02web.zoom.us/j/9918493831
END:VEVENT
BEGIN:VEVENT
SUMMARY:Sho Tanimoto
DTSTART;VALUE=DATE-TIME:20201215T110000Z
DTEND;VALUE=DATE-TIME:20201215T120000Z
DTSTAMP;VALUE=DATE-TIME:20201127T091040Z
UID:ZAG/77
DESCRIPTION:by Sho Tanimoto as part of ZAG (Zoom Algebraic Geometry) semin
ar\n\nInteractive livestream: https://us02web.zoom.us/j/9918493831\nAbstra
ct: TBA\n
URL:https://us02web.zoom.us/j/9918493831
END:VEVENT
BEGIN:VEVENT
SUMMARY:Andrew Harder
DTSTART;VALUE=DATE-TIME:20201217T160000Z
DTEND;VALUE=DATE-TIME:20201217T170000Z
DTSTAMP;VALUE=DATE-TIME:20201127T091040Z
UID:ZAG/78
DESCRIPTION:by Andrew Harder as part of ZAG (Zoom Algebraic Geometry) semi
nar\n\nInteractive livestream: https://us02web.zoom.us/j/9918493831\nAbstr
act: TBA\n
URL:https://us02web.zoom.us/j/9918493831
END:VEVENT
BEGIN:VEVENT
SUMMARY:Han-Bom Moon
DTSTART;VALUE=DATE-TIME:20201222T150000Z
DTEND;VALUE=DATE-TIME:20201222T160000Z
DTSTAMP;VALUE=DATE-TIME:20201127T091040Z
UID:ZAG/79
DESCRIPTION:by Han-Bom Moon as part of ZAG (Zoom Algebraic Geometry) semin
ar\n\nInteractive livestream: https://us02web.zoom.us/j/9918493831\nAbstra
ct: TBA\n
URL:https://us02web.zoom.us/j/9918493831
END:VEVENT
BEGIN:VEVENT
SUMMARY:Hokuto Uehara
DTSTART;VALUE=DATE-TIME:20201224T100000Z
DTEND;VALUE=DATE-TIME:20201224T110000Z
DTSTAMP;VALUE=DATE-TIME:20201127T091040Z
UID:ZAG/80
DESCRIPTION:by Hokuto Uehara as part of ZAG (Zoom Algebraic Geometry) semi
nar\n\nInteractive livestream: https://us02web.zoom.us/j/9918493831\nAbstr
act: TBA\n
URL:https://us02web.zoom.us/j/9918493831
END:VEVENT
BEGIN:VEVENT
SUMMARY:Jingjun Han
DTSTART;VALUE=DATE-TIME:20201229T150000Z
DTEND;VALUE=DATE-TIME:20201229T160000Z
DTSTAMP;VALUE=DATE-TIME:20201127T091040Z
UID:ZAG/81
DESCRIPTION:by Jingjun Han as part of ZAG (Zoom Algebraic Geometry) semina
r\n\nInteractive livestream: https://us02web.zoom.us/j/9918493831\nAbstrac
t: TBA\n
URL:https://us02web.zoom.us/j/9918493831
END:VEVENT
BEGIN:VEVENT
SUMMARY:Ivan Cheltsov
DTSTART;VALUE=DATE-TIME:20201231T130000Z
DTEND;VALUE=DATE-TIME:20201231T140000Z
DTSTAMP;VALUE=DATE-TIME:20201127T091040Z
UID:ZAG/82
DESCRIPTION:by Ivan Cheltsov as part of ZAG (Zoom Algebraic Geometry) semi
nar\n\nInteractive livestream: https://us02web.zoom.us/j/9918493831\nAbstr
act: TBA\n
URL:https://us02web.zoom.us/j/9918493831
END:VEVENT
BEGIN:VEVENT
SUMMARY:Shing-Tung Yau
DTSTART;VALUE=DATE-TIME:20210105T150000Z
DTEND;VALUE=DATE-TIME:20210105T160000Z
DTSTAMP;VALUE=DATE-TIME:20201127T091040Z
UID:ZAG/83
DESCRIPTION:by Shing-Tung Yau as part of ZAG (Zoom Algebraic Geometry) sem
inar\n\nInteractive livestream: https://us02web.zoom.us/j/9918493831\nAbst
ract: TBA\n
URL:https://us02web.zoom.us/j/9918493831
END:VEVENT
BEGIN:VEVENT
SUMMARY:Hiromichi Takagi
DTSTART;VALUE=DATE-TIME:20210107T100000Z
DTEND;VALUE=DATE-TIME:20210107T110000Z
DTSTAMP;VALUE=DATE-TIME:20201127T091040Z
UID:ZAG/84
DESCRIPTION:by Hiromichi Takagi as part of ZAG (Zoom Algebraic Geometry) s
eminar\n\nInteractive livestream: https://us02web.zoom.us/j/9918493831\nAb
stract: TBA\n
URL:https://us02web.zoom.us/j/9918493831
END:VEVENT
BEGIN:VEVENT
SUMMARY:Patricio Gallardo
DTSTART;VALUE=DATE-TIME:20210112T180000Z
DTEND;VALUE=DATE-TIME:20210112T190000Z
DTSTAMP;VALUE=DATE-TIME:20201127T091040Z
UID:ZAG/85
DESCRIPTION:by Patricio Gallardo as part of ZAG (Zoom Algebraic Geometry)
seminar\n\nInteractive livestream: https://us02web.zoom.us/j/9918493831\nA
bstract: TBA\n
URL:https://us02web.zoom.us/j/9918493831
END:VEVENT
BEGIN:VEVENT
SUMMARY:Hiromu Tanaka
DTSTART;VALUE=DATE-TIME:20210114T100000Z
DTEND;VALUE=DATE-TIME:20210114T110000Z
DTSTAMP;VALUE=DATE-TIME:20201127T091040Z
UID:ZAG/86
DESCRIPTION:by Hiromu Tanaka as part of ZAG (Zoom Algebraic Geometry) semi
nar\n\nInteractive livestream: https://us02web.zoom.us/j/9918493831\nAbstr
act: TBA\n
URL:https://us02web.zoom.us/j/9918493831
END:VEVENT
BEGIN:VEVENT
SUMMARY:Shihoko Ishii
DTSTART;VALUE=DATE-TIME:20210119T090000Z
DTEND;VALUE=DATE-TIME:20210119T100000Z
DTSTAMP;VALUE=DATE-TIME:20201127T091040Z
UID:ZAG/87
DESCRIPTION:by Shihoko Ishii as part of ZAG (Zoom Algebraic Geometry) semi
nar\n\nInteractive livestream: https://us02web.zoom.us/j/9918493831\nAbstr
act: TBA\n
URL:https://us02web.zoom.us/j/9918493831
END:VEVENT
BEGIN:VEVENT
SUMMARY:Osamu Fujino
DTSTART;VALUE=DATE-TIME:20210121T100000Z
DTEND;VALUE=DATE-TIME:20210121T110000Z
DTSTAMP;VALUE=DATE-TIME:20201127T091040Z
UID:ZAG/88
DESCRIPTION:by Osamu Fujino as part of ZAG (Zoom Algebraic Geometry) semin
ar\n\nInteractive livestream: https://us02web.zoom.us/j/9918493831\nAbstra
ct: TBA\n
URL:https://us02web.zoom.us/j/9918493831
END:VEVENT
BEGIN:VEVENT
SUMMARY:Frances Kirwan
DTSTART;VALUE=DATE-TIME:20210126T140000Z
DTEND;VALUE=DATE-TIME:20210126T150000Z
DTSTAMP;VALUE=DATE-TIME:20201127T091040Z
UID:ZAG/89
DESCRIPTION:by Frances Kirwan as part of ZAG (Zoom Algebraic Geometry) sem
inar\n\nInteractive livestream: https://us02web.zoom.us/j/9918493831\nAbst
ract: TBA\n
URL:https://us02web.zoom.us/j/9918493831
END:VEVENT
BEGIN:VEVENT
SUMMARY:Fabrizio Catanese
DTSTART;VALUE=DATE-TIME:20210128T140000Z
DTEND;VALUE=DATE-TIME:20210128T150000Z
DTSTAMP;VALUE=DATE-TIME:20201127T091040Z
UID:ZAG/90
DESCRIPTION:by Fabrizio Catanese as part of ZAG (Zoom Algebraic Geometry)
seminar\n\nInteractive livestream: https://us02web.zoom.us/j/9918493831\nA
bstract: TBA\n
URL:https://us02web.zoom.us/j/9918493831
END:VEVENT
BEGIN:VEVENT
SUMMARY:Simon Donaldson
DTSTART;VALUE=DATE-TIME:20210202T150000Z
DTEND;VALUE=DATE-TIME:20210202T160000Z
DTSTAMP;VALUE=DATE-TIME:20201127T091040Z
UID:ZAG/91
DESCRIPTION:by Simon Donaldson as part of ZAG (Zoom Algebraic Geometry) se
minar\n\nInteractive livestream: https://us02web.zoom.us/j/9918493831\nAbs
tract: TBA\n
URL:https://us02web.zoom.us/j/9918493831
END:VEVENT
BEGIN:VEVENT
SUMMARY:Shinnosuke Okawa
DTSTART;VALUE=DATE-TIME:20210204T110000Z
DTEND;VALUE=DATE-TIME:20210204T120000Z
DTSTAMP;VALUE=DATE-TIME:20201127T091040Z
UID:ZAG/92
DESCRIPTION:by Shinnosuke Okawa as part of ZAG (Zoom Algebraic Geometry) s
eminar\n\nInteractive livestream: https://us02web.zoom.us/j/9918493831\nAb
stract: TBA\n
URL:https://us02web.zoom.us/j/9918493831
END:VEVENT
BEGIN:VEVENT
SUMMARY:Enrica Floris
DTSTART;VALUE=DATE-TIME:20210209T110000Z
DTEND;VALUE=DATE-TIME:20210209T120000Z
DTSTAMP;VALUE=DATE-TIME:20201127T091040Z
UID:ZAG/93
DESCRIPTION:by Enrica Floris as part of ZAG (Zoom Algebraic Geometry) semi
nar\n\nInteractive livestream: https://us02web.zoom.us/j/9918493831\nAbstr
act: TBA\n
URL:https://us02web.zoom.us/j/9918493831
END:VEVENT
BEGIN:VEVENT
SUMMARY:Tomasso de Fernex
DTSTART;VALUE=DATE-TIME:20210211T170000Z
DTEND;VALUE=DATE-TIME:20210211T180000Z
DTSTAMP;VALUE=DATE-TIME:20201127T091040Z
UID:ZAG/94
DESCRIPTION:by Tomasso de Fernex as part of ZAG (Zoom Algebraic Geometry)
seminar\n\nInteractive livestream: https://us02web.zoom.us/j/9918493831\nA
bstract: TBA\n
URL:https://us02web.zoom.us/j/9918493831
END:VEVENT
BEGIN:VEVENT
SUMMARY:Yusuke Nakamura
DTSTART;VALUE=DATE-TIME:20210216T110000Z
DTEND;VALUE=DATE-TIME:20210216T120000Z
DTSTAMP;VALUE=DATE-TIME:20201127T091040Z
UID:ZAG/95
DESCRIPTION:by Yusuke Nakamura as part of ZAG (Zoom Algebraic Geometry) se
minar\n\nInteractive livestream: https://us02web.zoom.us/j/9918493831\nAbs
tract: TBA\n
URL:https://us02web.zoom.us/j/9918493831
END:VEVENT
BEGIN:VEVENT
SUMMARY:Frediani Paola
DTSTART;VALUE=DATE-TIME:20210218T140000Z
DTEND;VALUE=DATE-TIME:20210218T150000Z
DTSTAMP;VALUE=DATE-TIME:20201127T091040Z
UID:ZAG/96
DESCRIPTION:by Frediani Paola as part of ZAG (Zoom Algebraic Geometry) sem
inar\n\nInteractive livestream: https://us02web.zoom.us/j/9918493831\nAbst
ract: TBA\n
URL:https://us02web.zoom.us/j/9918493831
END:VEVENT
BEGIN:VEVENT
SUMMARY:Taku Suzuki
DTSTART;VALUE=DATE-TIME:20210223T100000Z
DTEND;VALUE=DATE-TIME:20210223T110000Z
DTSTAMP;VALUE=DATE-TIME:20201127T091040Z
UID:ZAG/97
DESCRIPTION:by Taku Suzuki as part of ZAG (Zoom Algebraic Geometry) semina
r\n\nInteractive livestream: https://us02web.zoom.us/j/9918493831\nAbstrac
t: TBA\n
URL:https://us02web.zoom.us/j/9918493831
END:VEVENT
BEGIN:VEVENT
SUMMARY:Atsushi Ito
DTSTART;VALUE=DATE-TIME:20210225T100000Z
DTEND;VALUE=DATE-TIME:20210225T110000Z
DTSTAMP;VALUE=DATE-TIME:20201127T091040Z
UID:ZAG/98
DESCRIPTION:by Atsushi Ito as part of ZAG (Zoom Algebraic Geometry) semina
r\n\nInteractive livestream: https://us02web.zoom.us/j/9918493831\nAbstrac
t: TBA\n
URL:https://us02web.zoom.us/j/9918493831
END:VEVENT
BEGIN:VEVENT
SUMMARY:Fernando Cukierman
DTSTART;VALUE=DATE-TIME:20210302T150000Z
DTEND;VALUE=DATE-TIME:20210302T160000Z
DTSTAMP;VALUE=DATE-TIME:20201127T091040Z
UID:ZAG/99
DESCRIPTION:by Fernando Cukierman as part of ZAG (Zoom Algebraic Geometry)
seminar\n\nInteractive livestream: https://us02web.zoom.us/j/9918493831\n
Abstract: TBA\n
URL:https://us02web.zoom.us/j/9918493831
END:VEVENT
BEGIN:VEVENT
SUMMARY:Kiwamu Watanabe
DTSTART;VALUE=DATE-TIME:20210304T100000Z
DTEND;VALUE=DATE-TIME:20210304T110000Z
DTSTAMP;VALUE=DATE-TIME:20201127T091040Z
UID:ZAG/100
DESCRIPTION:by Kiwamu Watanabe as part of ZAG (Zoom Algebraic Geometry) se
minar\n\nInteractive livestream: https://us02web.zoom.us/j/9918493831\nAbs
tract: TBA\n
URL:https://us02web.zoom.us/j/9918493831
END:VEVENT
BEGIN:VEVENT
SUMMARY:Sunsuke Takagi
DTSTART;VALUE=DATE-TIME:20210309T110000Z
DTEND;VALUE=DATE-TIME:20210309T120000Z
DTSTAMP;VALUE=DATE-TIME:20201127T091040Z
UID:ZAG/101
DESCRIPTION:by Sunsuke Takagi as part of ZAG (Zoom Algebraic Geometry) sem
inar\n\nInteractive livestream: https://us02web.zoom.us/j/9918493831\nAbst
ract: TBA\n
URL:https://us02web.zoom.us/j/9918493831
END:VEVENT
BEGIN:VEVENT
SUMMARY:Carolina Araujo
DTSTART;VALUE=DATE-TIME:20210311T150000Z
DTEND;VALUE=DATE-TIME:20210311T160000Z
DTSTAMP;VALUE=DATE-TIME:20201127T091040Z
UID:ZAG/102
DESCRIPTION:by Carolina Araujo as part of ZAG (Zoom Algebraic Geometry) se
minar\n\nInteractive livestream: https://us02web.zoom.us/j/9918493831\nAbs
tract: TBA\n
URL:https://us02web.zoom.us/j/9918493831
END:VEVENT
BEGIN:VEVENT
SUMMARY:Taro Sano
DTSTART;VALUE=DATE-TIME:20210316T100000Z
DTEND;VALUE=DATE-TIME:20210316T110000Z
DTSTAMP;VALUE=DATE-TIME:20201127T091040Z
UID:ZAG/103
DESCRIPTION:by Taro Sano as part of ZAG (Zoom Algebraic Geometry) seminar\
n\nInteractive livestream: https://us02web.zoom.us/j/9918493831\nAbstract:
TBA\n
URL:https://us02web.zoom.us/j/9918493831
END:VEVENT
BEGIN:VEVENT
SUMMARY:Chris Lazda
DTSTART;VALUE=DATE-TIME:20210318T150000Z
DTEND;VALUE=DATE-TIME:20210318T160000Z
DTSTAMP;VALUE=DATE-TIME:20201127T091040Z
UID:ZAG/104
DESCRIPTION:by Chris Lazda as part of ZAG (Zoom Algebraic Geometry) semina
r\n\nInteractive livestream: https://us02web.zoom.us/j/9918493831\nAbstrac
t: TBA\n
URL:https://us02web.zoom.us/j/9918493831
END:VEVENT
BEGIN:VEVENT
SUMMARY:John Lesieutre
DTSTART;VALUE=DATE-TIME:20210323T100000Z
DTEND;VALUE=DATE-TIME:20210323T110000Z
DTSTAMP;VALUE=DATE-TIME:20201127T091040Z
UID:ZAG/105
DESCRIPTION:by John Lesieutre as part of ZAG (Zoom Algebraic Geometry) sem
inar\n\nInteractive livestream: https://us02web.zoom.us/j/9918493831\nAbst
ract: TBA\n
URL:https://us02web.zoom.us/j/9918493831
END:VEVENT
BEGIN:VEVENT
SUMMARY:Giulia Sacca
DTSTART;VALUE=DATE-TIME:20210325T150000Z
DTEND;VALUE=DATE-TIME:20210325T160000Z
DTSTAMP;VALUE=DATE-TIME:20201127T091040Z
UID:ZAG/106
DESCRIPTION:by Giulia Sacca as part of ZAG (Zoom Algebraic Geometry) semin
ar\n\nInteractive livestream: https://us02web.zoom.us/j/9918493831\nAbstra
ct: TBA\n
URL:https://us02web.zoom.us/j/9918493831
END:VEVENT
BEGIN:VEVENT
SUMMARY:Katsuhisa Furukawa
DTSTART;VALUE=DATE-TIME:20210330T100000Z
DTEND;VALUE=DATE-TIME:20210330T110000Z
DTSTAMP;VALUE=DATE-TIME:20201127T091040Z
UID:ZAG/107
DESCRIPTION:by Katsuhisa Furukawa as part of ZAG (Zoom Algebraic Geometry)
seminar\n\nInteractive livestream: https://us02web.zoom.us/j/9918493831\n
Abstract: TBA\n
URL:https://us02web.zoom.us/j/9918493831
END:VEVENT
BEGIN:VEVENT
SUMMARY:Vyacheslav Shokurov
DTSTART;VALUE=DATE-TIME:20210401T150000Z
DTEND;VALUE=DATE-TIME:20210401T160000Z
DTSTAMP;VALUE=DATE-TIME:20201127T091040Z
UID:ZAG/108
DESCRIPTION:by Vyacheslav Shokurov as part of ZAG (Zoom Algebraic Geometry
) seminar\n\nInteractive livestream: https://us02web.zoom.us/j/9918493831\
nAbstract: TBA\n
URL:https://us02web.zoom.us/j/9918493831
END:VEVENT
BEGIN:VEVENT
SUMMARY:Takehiko Yasuda
DTSTART;VALUE=DATE-TIME:20210406T100000Z
DTEND;VALUE=DATE-TIME:20210406T110000Z
DTSTAMP;VALUE=DATE-TIME:20201127T091040Z
UID:ZAG/109
DESCRIPTION:by Takehiko Yasuda as part of ZAG (Zoom Algebraic Geometry) se
minar\n\nInteractive livestream: https://us02web.zoom.us/j/9918493831\nAbs
tract: TBA\n
URL:https://us02web.zoom.us/j/9918493831
END:VEVENT
BEGIN:VEVENT
SUMMARY:Adrian Langer
DTSTART;VALUE=DATE-TIME:20210408T130000Z
DTEND;VALUE=DATE-TIME:20210408T140000Z
DTSTAMP;VALUE=DATE-TIME:20201127T091040Z
UID:ZAG/110
DESCRIPTION:by Adrian Langer as part of ZAG (Zoom Algebraic Geometry) semi
nar\n\nInteractive livestream: https://us02web.zoom.us/j/9918493831\nAbstr
act: TBA\n
URL:https://us02web.zoom.us/j/9918493831
END:VEVENT
BEGIN:VEVENT
SUMMARY:Karl Schwede
DTSTART;VALUE=DATE-TIME:20210413T170000Z
DTEND;VALUE=DATE-TIME:20210413T180000Z
DTSTAMP;VALUE=DATE-TIME:20201127T091040Z
UID:ZAG/111
DESCRIPTION:by Karl Schwede as part of ZAG (Zoom Algebraic Geometry) semin
ar\n\nInteractive livestream: https://us02web.zoom.us/j/9918493831\nAbstra
ct: TBA\n
URL:https://us02web.zoom.us/j/9918493831
END:VEVENT
BEGIN:VEVENT
SUMMARY:Yasunari Nagai
DTSTART;VALUE=DATE-TIME:20210415T100000Z
DTEND;VALUE=DATE-TIME:20210415T110000Z
DTSTAMP;VALUE=DATE-TIME:20201127T091040Z
UID:ZAG/112
DESCRIPTION:by Yasunari Nagai as part of ZAG (Zoom Algebraic Geometry) sem
inar\n\nInteractive livestream: https://us02web.zoom.us/j/9918493831\nAbst
ract: TBA\n
URL:https://us02web.zoom.us/j/9918493831
END:VEVENT
BEGIN:VEVENT
SUMMARY:Jakub Witaszek
DTSTART;VALUE=DATE-TIME:20210420T170000Z
DTEND;VALUE=DATE-TIME:20210420T180000Z
DTSTAMP;VALUE=DATE-TIME:20201127T091040Z
UID:ZAG/113
DESCRIPTION:by Jakub Witaszek as part of ZAG (Zoom Algebraic Geometry) sem
inar\n\nInteractive livestream: https://us02web.zoom.us/j/9918493831\nAbst
ract: TBA\n
URL:https://us02web.zoom.us/j/9918493831
END:VEVENT
BEGIN:VEVENT
SUMMARY:Sandor Kovacs
DTSTART;VALUE=DATE-TIME:20210422T170000Z
DTEND;VALUE=DATE-TIME:20210422T180000Z
DTSTAMP;VALUE=DATE-TIME:20201127T091040Z
UID:ZAG/114
DESCRIPTION:by Sandor Kovacs as part of ZAG (Zoom Algebraic Geometry) semi
nar\n\nInteractive livestream: https://us02web.zoom.us/j/9918493831\nAbstr
act: TBA\n
URL:https://us02web.zoom.us/j/9918493831
END:VEVENT
BEGIN:VEVENT
SUMMARY:Yuri Tschinkel
DTSTART;VALUE=DATE-TIME:20210427T150000Z
DTEND;VALUE=DATE-TIME:20210427T160000Z
DTSTAMP;VALUE=DATE-TIME:20201127T091040Z
UID:ZAG/115
DESCRIPTION:by Yuri Tschinkel as part of ZAG (Zoom Algebraic Geometry) sem
inar\n\nInteractive livestream: https://us02web.zoom.us/j/9918493831\nAbst
ract: TBA\n
URL:https://us02web.zoom.us/j/9918493831
END:VEVENT
BEGIN:VEVENT
SUMMARY:Ana Margarida Melo
DTSTART;VALUE=DATE-TIME:20210429T120000Z
DTEND;VALUE=DATE-TIME:20210429T130000Z
DTSTAMP;VALUE=DATE-TIME:20201127T091040Z
UID:ZAG/116
DESCRIPTION:by Ana Margarida Melo as part of ZAG (Zoom Algebraic Geometry)
seminar\n\nInteractive livestream: https://us02web.zoom.us/j/9918493831\n
Abstract: TBA\n
URL:https://us02web.zoom.us/j/9918493831
END:VEVENT
BEGIN:VEVENT
SUMMARY:Maria Pe Pereira
DTSTART;VALUE=DATE-TIME:20210504T140000Z
DTEND;VALUE=DATE-TIME:20210504T150000Z
DTSTAMP;VALUE=DATE-TIME:20201127T091040Z
UID:ZAG/117
DESCRIPTION:by Maria Pe Pereira as part of ZAG (Zoom Algebraic Geometry) s
eminar\n\nInteractive livestream: https://us02web.zoom.us/j/9918493831\nAb
stract: TBA\n
URL:https://us02web.zoom.us/j/9918493831
END:VEVENT
BEGIN:VEVENT
SUMMARY:Mara Ungureanu
DTSTART;VALUE=DATE-TIME:20210506T140000Z
DTEND;VALUE=DATE-TIME:20210506T150000Z
DTSTAMP;VALUE=DATE-TIME:20201127T091040Z
UID:ZAG/118
DESCRIPTION:by Mara Ungureanu as part of ZAG (Zoom Algebraic Geometry) sem
inar\n\nInteractive livestream: https://us02web.zoom.us/j/9918493831\nAbst
ract: TBA\n
URL:https://us02web.zoom.us/j/9918493831
END:VEVENT
BEGIN:VEVENT
SUMMARY:Stefan Kebekus
DTSTART;VALUE=DATE-TIME:20210511T130000Z
DTEND;VALUE=DATE-TIME:20210511T140000Z
DTSTAMP;VALUE=DATE-TIME:20201127T091040Z
UID:ZAG/119
DESCRIPTION:by Stefan Kebekus as part of ZAG (Zoom Algebraic Geometry) sem
inar\n\nInteractive livestream: https://us02web.zoom.us/j/9918493831\nAbst
ract: TBA\n
URL:https://us02web.zoom.us/j/9918493831
END:VEVENT
BEGIN:VEVENT
SUMMARY:Roya Beheshti Zavareh
DTSTART;VALUE=DATE-TIME:20210513T170000Z
DTEND;VALUE=DATE-TIME:20210513T180000Z
DTSTAMP;VALUE=DATE-TIME:20201127T091040Z
UID:ZAG/120
DESCRIPTION:by Roya Beheshti Zavareh as part of ZAG (Zoom Algebraic Geomet
ry) seminar\n\nInteractive livestream: https://us02web.zoom.us/j/991849383
1\nAbstract: TBA\n
URL:https://us02web.zoom.us/j/9918493831
END:VEVENT
BEGIN:VEVENT
SUMMARY:Jorgen Rennemo
DTSTART;VALUE=DATE-TIME:20210518T150000Z
DTEND;VALUE=DATE-TIME:20210518T160000Z
DTSTAMP;VALUE=DATE-TIME:20201127T091040Z
UID:ZAG/121
DESCRIPTION:by Jorgen Rennemo as part of ZAG (Zoom Algebraic Geometry) sem
inar\n\nInteractive livestream: https://us02web.zoom.us/j/9918493831\nAbst
ract: TBA\n
URL:https://us02web.zoom.us/j/9918493831
END:VEVENT
BEGIN:VEVENT
SUMMARY:Marta Pieropan
DTSTART;VALUE=DATE-TIME:20210520T150000Z
DTEND;VALUE=DATE-TIME:20210520T160000Z
DTSTAMP;VALUE=DATE-TIME:20201127T091040Z
UID:ZAG/122
DESCRIPTION:by Marta Pieropan as part of ZAG (Zoom Algebraic Geometry) sem
inar\n\nInteractive livestream: https://us02web.zoom.us/j/9918493831\nAbst
ract: TBA\n
URL:https://us02web.zoom.us/j/9918493831
END:VEVENT
BEGIN:VEVENT
SUMMARY:Brendan Hassett
DTSTART;VALUE=DATE-TIME:20210525T150000Z
DTEND;VALUE=DATE-TIME:20210525T160000Z
DTSTAMP;VALUE=DATE-TIME:20201127T091040Z
UID:ZAG/123
DESCRIPTION:by Brendan Hassett as part of ZAG (Zoom Algebraic Geometry) se
minar\n\nInteractive livestream: https://us02web.zoom.us/j/9918493831\nAbs
tract: TBA\n
URL:https://us02web.zoom.us/j/9918493831
END:VEVENT
BEGIN:VEVENT
SUMMARY:Anthony Varilly-Alvarado
DTSTART;VALUE=DATE-TIME:20210527T150000Z
DTEND;VALUE=DATE-TIME:20210527T160000Z
DTSTAMP;VALUE=DATE-TIME:20201127T091040Z
UID:ZAG/124
DESCRIPTION:by Anthony Varilly-Alvarado as part of ZAG (Zoom Algebraic Geo
metry) seminar\n\nInteractive livestream: https://us02web.zoom.us/j/991849
3831\nAbstract: TBA\n
URL:https://us02web.zoom.us/j/9918493831
END:VEVENT
BEGIN:VEVENT
SUMMARY:Livia Campo
DTSTART;VALUE=DATE-TIME:20210601T110000Z
DTEND;VALUE=DATE-TIME:20210601T120000Z
DTSTAMP;VALUE=DATE-TIME:20201127T091040Z
UID:ZAG/125
DESCRIPTION:by Livia Campo as part of ZAG (Zoom Algebraic Geometry) semina
r\n\nInteractive livestream: https://us02web.zoom.us/j/9918493831\nAbstrac
t: TBA\n
URL:https://us02web.zoom.us/j/9918493831
END:VEVENT
BEGIN:VEVENT
SUMMARY:Enrico Fatighenti
DTSTART;VALUE=DATE-TIME:20210603T160000Z
DTEND;VALUE=DATE-TIME:20210603T170000Z
DTSTAMP;VALUE=DATE-TIME:20201127T091040Z
UID:ZAG/126
DESCRIPTION:by Enrico Fatighenti as part of ZAG (Zoom Algebraic Geometry)
seminar\n\nInteractive livestream: https://us02web.zoom.us/j/9918493831\nA
bstract: TBA\n
URL:https://us02web.zoom.us/j/9918493831
END:VEVENT
BEGIN:VEVENT
SUMMARY:Sean Keel
DTSTART;VALUE=DATE-TIME:20210608T160000Z
DTEND;VALUE=DATE-TIME:20210608T170000Z
DTSTAMP;VALUE=DATE-TIME:20201127T091040Z
UID:ZAG/127
DESCRIPTION:by Sean Keel as part of ZAG (Zoom Algebraic Geometry) seminar\
n\nInteractive livestream: https://us02web.zoom.us/j/9918493831\nAbstract:
TBA\n
URL:https://us02web.zoom.us/j/9918493831
END:VEVENT
BEGIN:VEVENT
SUMMARY:Fumiaki Suzuki
DTSTART;VALUE=DATE-TIME:20210610T160000Z
DTEND;VALUE=DATE-TIME:20210610T170000Z
DTSTAMP;VALUE=DATE-TIME:20201127T091040Z
UID:ZAG/128
DESCRIPTION:by Fumiaki Suzuki as part of ZAG (Zoom Algebraic Geometry) sem
inar\n\nInteractive livestream: https://us02web.zoom.us/j/9918493831\nAbst
ract: TBA\n
URL:https://us02web.zoom.us/j/9918493831
END:VEVENT
BEGIN:VEVENT
SUMMARY:Eveline Legendre
DTSTART;VALUE=DATE-TIME:20210615T110000Z
DTEND;VALUE=DATE-TIME:20210615T120000Z
DTSTAMP;VALUE=DATE-TIME:20201127T091040Z
UID:ZAG/129
DESCRIPTION:by Eveline Legendre as part of ZAG (Zoom Algebraic Geometry) s
eminar\n\nInteractive livestream: https://us02web.zoom.us/j/9918493831\nAb
stract: TBA\n
URL:https://us02web.zoom.us/j/9918493831
END:VEVENT
BEGIN:VEVENT
SUMMARY:Paolo Cascini
DTSTART;VALUE=DATE-TIME:20210617T160000Z
DTEND;VALUE=DATE-TIME:20210617T170000Z
DTSTAMP;VALUE=DATE-TIME:20201127T091040Z
UID:ZAG/130
DESCRIPTION:by Paolo Cascini as part of ZAG (Zoom Algebraic Geometry) semi
nar\n\nInteractive livestream: https://us02web.zoom.us/j/9918493831\nAbstr
act: TBA\n
URL:https://us02web.zoom.us/j/9918493831
END:VEVENT
END:VCALENDAR