BEGIN:VCALENDAR
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PRODID:researchseminars.org
CALSCALE:GREGORIAN
X-WR-CALNAME:researchseminars.org
BEGIN:VEVENT
SUMMARY:Zhuang He (HU Berlin)
DTSTART;VALUE=DATE-TIME:20201104T140000Z
DTEND;VALUE=DATE-TIME:20201104T150000Z
DTSTAMP;VALUE=DATE-TIME:20210514T191359Z
UID:HUBerlinAG/1
DESCRIPTION:Title: Birational geometry of blow-ups of the projective space along linear su
bspaces and automorphisms of Kummer surfaces\nby Zhuang He (HU Berlin)
as part of Humboldt Algebraic Geometry Seminar\n\nAbstract: TBA\n
LOCATION:https://researchseminars.org/talk/HUBerlinAG/1/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Thomas Krämer (HU Berlin)
DTSTART;VALUE=DATE-TIME:20201111T140000Z
DTEND;VALUE=DATE-TIME:20201111T150000Z
DTSTAMP;VALUE=DATE-TIME:20210514T191359Z
UID:HUBerlinAG/2
DESCRIPTION:Title: Semicontinuity of Gauss maps and the Schottky problem\nby Thomas Kr
ämer (HU Berlin) as part of Humboldt Algebraic Geometry Seminar\n\nAbstra
ct: TBA\n
LOCATION:https://researchseminars.org/talk/HUBerlinAG/2/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Michael Kemeny (Wisconsin)
DTSTART;VALUE=DATE-TIME:20201118T150000Z
DTEND;VALUE=DATE-TIME:20201118T160000Z
DTSTAMP;VALUE=DATE-TIME:20210514T191359Z
UID:HUBerlinAG/3
DESCRIPTION:Title: Minimal rank generators for syzygies of canonical curves\nby Michae
l Kemeny (Wisconsin) as part of Humboldt Algebraic Geometry Seminar\n\nAbs
tract: TBA\n
LOCATION:https://researchseminars.org/talk/HUBerlinAG/3/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Nicola Tarasca (Virginia)
DTSTART;VALUE=DATE-TIME:20201125T140000Z
DTEND;VALUE=DATE-TIME:20201125T150000Z
DTSTAMP;VALUE=DATE-TIME:20210514T191359Z
UID:HUBerlinAG/4
DESCRIPTION:Title: Motivic classes of degeneracy loci and pointed Brill-Noether varieties<
/a>\nby Nicola Tarasca (Virginia) as part of Humboldt Algebraic Geometry S
eminar\n\nAbstract: TBA\n
LOCATION:https://researchseminars.org/talk/HUBerlinAG/4/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Gaetan Borot (HU Berlin)
DTSTART;VALUE=DATE-TIME:20201202T140000Z
DTEND;VALUE=DATE-TIME:20201202T150000Z
DTSTAMP;VALUE=DATE-TIME:20210514T191359Z
UID:HUBerlinAG/5
DESCRIPTION:Title: ELSV and topological recursion for double Hurwitz numbers\nby Gaeta
n Borot (HU Berlin) as part of Humboldt Algebraic Geometry Seminar\n\nAbst
ract: TBA\n
LOCATION:https://researchseminars.org/talk/HUBerlinAG/5/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Lawrence Ein
DTSTART;VALUE=DATE-TIME:20201209T150000Z
DTEND;VALUE=DATE-TIME:20201209T160000Z
DTSTAMP;VALUE=DATE-TIME:20210514T191359Z
UID:HUBerlinAG/6
DESCRIPTION:Title: Singularities and syzygies of secant varieties of curves\nby Lawren
ce Ein as part of Humboldt Algebraic Geometry Seminar\n\nAbstract: TBA\n
LOCATION:https://researchseminars.org/talk/HUBerlinAG/6/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Yohan Brunebarbe
DTSTART;VALUE=DATE-TIME:20201216T140000Z
DTEND;VALUE=DATE-TIME:20201216T150000Z
DTSTAMP;VALUE=DATE-TIME:20210514T191359Z
UID:HUBerlinAG/7
DESCRIPTION:Title: Increasing hyperbolicity of varieties supporting a variation of Hodge s
tructures with level structures\nby Yohan Brunebarbe as part of Humbol
dt Algebraic Geometry Seminar\n\nAbstract: TBA\n
LOCATION:https://researchseminars.org/talk/HUBerlinAG/7/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Ignacio Barros (Paris-Saclay)
DTSTART;VALUE=DATE-TIME:20210113T140000Z
DTEND;VALUE=DATE-TIME:20210113T150000Z
DTSTAMP;VALUE=DATE-TIME:20210514T191359Z
UID:HUBerlinAG/8
DESCRIPTION:Title: On the irrationality of moduli spaces of K3 surfaces\nby Ignacio Ba
rros (Paris-Saclay) as part of Humboldt Algebraic Geometry Seminar\n\nAbst
ract: TBA\n
LOCATION:https://researchseminars.org/talk/HUBerlinAG/8/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Ruijie Yang (Stony Brook)
DTSTART;VALUE=DATE-TIME:20210113T151500Z
DTEND;VALUE=DATE-TIME:20210113T161500Z
DTSTAMP;VALUE=DATE-TIME:20210514T191359Z
UID:HUBerlinAG/9
DESCRIPTION:Title: Decomposition theorem for semisimple local systems\nby Ruijie Yang
(Stony Brook) as part of Humboldt Algebraic Geometry Seminar\n\nAbstract:
TBA\n
LOCATION:https://researchseminars.org/talk/HUBerlinAG/9/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Frederik Benirschke (Stony Brook)
DTSTART;VALUE=DATE-TIME:20210120T140000Z
DTEND;VALUE=DATE-TIME:20210120T150000Z
DTSTAMP;VALUE=DATE-TIME:20210514T191359Z
UID:HUBerlinAG/10
DESCRIPTION:Title: Boundary of linear subvarieties\nby Frederik Benirschke (Stony Bro
ok) as part of Humboldt Algebraic Geometry Seminar\n\nAbstract: TBA\n
LOCATION:https://researchseminars.org/talk/HUBerlinAG/10/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Yeuk Hay Joshua Lam (Harvard)
DTSTART;VALUE=DATE-TIME:20210120T151500Z
DTEND;VALUE=DATE-TIME:20210120T161500Z
DTSTAMP;VALUE=DATE-TIME:20210514T191359Z
UID:HUBerlinAG/11
DESCRIPTION:Title: Calabi-Yau varieties and Shimura varieties\nby Yeuk Hay Joshua Lam
(Harvard) as part of Humboldt Algebraic Geometry Seminar\n\nAbstract: TBA
\n
LOCATION:https://researchseminars.org/talk/HUBerlinAG/11/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Dawei Chen (Boston College)
DTSTART;VALUE=DATE-TIME:20210210T140000Z
DTEND;VALUE=DATE-TIME:20210210T150000Z
DTSTAMP;VALUE=DATE-TIME:20210514T191359Z
UID:HUBerlinAG/12
DESCRIPTION:Title: Connected components of the space of k-differentials\nby Dawei Che
n (Boston College) as part of Humboldt Algebraic Geometry Seminar\n\nAbstr
act: TBA\n
LOCATION:https://researchseminars.org/talk/HUBerlinAG/12/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Claire Voisin (College de France)
DTSTART;VALUE=DATE-TIME:20210217T140000Z
DTEND;VALUE=DATE-TIME:20210217T150000Z
DTSTAMP;VALUE=DATE-TIME:20210514T191359Z
UID:HUBerlinAG/13
DESCRIPTION:Title: Schiffer variations of hypersurfaces and the generic Torelli theorem\nby Claire Voisin (College de France) as part of Humboldt Algebraic Geo
metry Seminar\n\nAbstract: TBA\n
LOCATION:https://researchseminars.org/talk/HUBerlinAG/13/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Carl Lian (HU Berlin)
DTSTART;VALUE=DATE-TIME:20210303T140000Z
DTEND;VALUE=DATE-TIME:20210303T150000Z
DTSTAMP;VALUE=DATE-TIME:20210514T191359Z
UID:HUBerlinAG/14
DESCRIPTION:Title: Non-tautological and H-tautological Hurwitz cycles\nby Carl Lian (
HU Berlin) as part of Humboldt Algebraic Geometry Seminar\n\nAbstract: TBA
\n
LOCATION:https://researchseminars.org/talk/HUBerlinAG/14/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Giacomo Mezzedimi (Hannover)
DTSTART;VALUE=DATE-TIME:20210127T140000Z
DTEND;VALUE=DATE-TIME:20210127T150000Z
DTSTAMP;VALUE=DATE-TIME:20210514T191359Z
UID:HUBerlinAG/15
DESCRIPTION:Title: The Kodaira dimension of some moduli spaces of elliptic K3 surfaces\nby Giacomo Mezzedimi (Hannover) as part of Humboldt Algebraic Geometry
Seminar\n\nAbstract: TBA\n
LOCATION:https://researchseminars.org/talk/HUBerlinAG/15/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Leonardo Lerer (Paris-Saclay)
DTSTART;VALUE=DATE-TIME:20210106T140000Z
DTEND;VALUE=DATE-TIME:20210106T150000Z
DTSTAMP;VALUE=DATE-TIME:20210514T191359Z
UID:HUBerlinAG/16
DESCRIPTION:Title: Cohomology jump loci on singular varieties\nby Leonardo Lerer (Par
is-Saclay) as part of Humboldt Algebraic Geometry Seminar\n\nAbstract: TBA
\n
LOCATION:https://researchseminars.org/talk/HUBerlinAG/16/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Andrey Soldatenkov (HU Berlin)
DTSTART;VALUE=DATE-TIME:20210414T140000Z
DTEND;VALUE=DATE-TIME:20210414T150000Z
DTSTAMP;VALUE=DATE-TIME:20210514T191359Z
UID:HUBerlinAG/17
DESCRIPTION:Title: Holonomy of the Obata connection on hypercomplex manifolds\nby And
rey Soldatenkov (HU Berlin) as part of Humboldt Algebraic Geometry Seminar
\n\n\nAbstract\nThe algebra of quaternions has been a focus of attention i
n many branches of mathematics ever since its introduction by Hamilton. On
e may think that quaternions form a noncommutative finite extension of the
field of complex numbers. For a geometer\, it is natural to wonder if the
re exists a suitable notion of a quaternionic variety\, analogous to a com
plex algebraic variety. I will try to give an introduction to this circle
of ideas\, explain how one can approach quaternionic (or hypercomplex) geo
metry and what natural problems arise in this context. One important notio
n in hypercomplex geometry is the Obata connection\, the unique torsion-fr
ee connection that preserves the action of the quaternions. I will present
some results on the study of its holonomy.\n
LOCATION:https://researchseminars.org/talk/HUBerlinAG/17/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Alessandro Verra (Universita Roma Tre)
DTSTART;VALUE=DATE-TIME:20210421T140000Z
DTEND;VALUE=DATE-TIME:20210421T150000Z
DTSTAMP;VALUE=DATE-TIME:20210514T191359Z
UID:HUBerlinAG/18
DESCRIPTION:Title: The Igusa quartic and the Prym map\nby Alessandro Verra (Universit
a Roma Tre) as part of Humboldt Algebraic Geometry Seminar\n\n\nAbstract\n
The Igusa\, or the Castelnuovo-Richmond quartic is a famous hypersurface o
f the complex projective 4-space known for its ubiquity in algebraic geome
try. It is related to the Prym map $P$ in genus 6. As is well known the m
ap $P$ has degree 27 and dominates the moduli space of 5-dimensional princ
ipally polarized abelian varieties. Other maps with the same monodromy ar
e associated to $P$ and reflect related configurations. Among these these
of particular importance is the map $J: D \\rightarrow A_5$\, with fibre t
he configuration of double sixes of lines of the cubic surface. We descri
be $J$ geometrically\, showing that it is birationally equivalent to the p
eriod map for the moduli space $D$ of 30-nodal quartic threefolds\, cutti
ng twice a quadratic section of the Igusa quartic.\n
LOCATION:https://researchseminars.org/talk/HUBerlinAG/18/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Hannah Larson (Stanford University)
DTSTART;VALUE=DATE-TIME:20210428T150000Z
DTEND;VALUE=DATE-TIME:20210428T160000Z
DTSTAMP;VALUE=DATE-TIME:20210514T191359Z
UID:HUBerlinAG/19
DESCRIPTION:Title: The rational Chow rings of $M_7$\, $M_8$\, and $M_9$\nby Hannah La
rson (Stanford University) as part of Humboldt Algebraic Geometry Seminar\
n\n\nAbstract\nThe rational Chow ring of the moduli space $M_g$ of curves
of genus $g$ is known for $g \\leq 6$. In each of these cases\, the Chow r
ing is tautological (generated by certain natural classes known as kappa c
lasses). In recent joint work with Sam Canning\, we prove that the rationa
l Chow ring of $M_g$ is tautological for $g = 7\, 8\, 9$\, thereby determi
ning the Chow rings by work of Faber. In this talk\, I will give an overvi
ew of our approach\, with particular focus on the locus of tetragonal curv
es (special curves admitting a degree 4 map to $\\mathbb{P}^1$).\n
LOCATION:https://researchseminars.org/talk/HUBerlinAG/19/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Mina Aganagic (University of California Berkeley)
DTSTART;VALUE=DATE-TIME:20210512T150000Z
DTEND;VALUE=DATE-TIME:20210512T160000Z
DTSTAMP;VALUE=DATE-TIME:20210514T191359Z
UID:HUBerlinAG/20
DESCRIPTION:Title: Khovanov Homology from Mirror Symmetry\nby Mina Aganagic (Universi
ty of California Berkeley) as part of Humboldt Algebraic Geometry Seminar\
n\n\nAbstract\nKhovanov showed\, more than 20 years ago\, that there is a
deeper theory underlying the Jones polynomial. The “knot categorificatio
n problem” is to find a uniform description of this theory\, for all gau
ge groups\, which originates from physics\, or geometry. I will describe t
wo solutions to this problem\, which I recently discovered\, related by a
version of two dimensional (homological) mirror symmetry. The theories are
significantly more efficient than the algebraic descriptions mathematicia
ns have found\, even in the Khovanov homology case.\n
LOCATION:https://researchseminars.org/talk/HUBerlinAG/20/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Rahul Pandharipande (ETH Zürich)
DTSTART;VALUE=DATE-TIME:20210526T140000Z
DTEND;VALUE=DATE-TIME:20210526T150000Z
DTSTAMP;VALUE=DATE-TIME:20210514T191359Z
UID:HUBerlinAG/21
DESCRIPTION:Title: Tevelev degrees and Hurwitz moduli spaces\nby Rahul Pandharipande
(ETH Zürich) as part of Humboldt Algebraic Geometry Seminar\n\nInteractiv
e livestream: https://hu-berlin.zoom.us/meeting/register/u5ItdOuqrTMrHNY8J
0yFSvw9pxKl8ZxAyMQG\nPassword hint: The order of the Weyl group of E6\n\nA
bstract\nI will explain various numerical and cohomological questions rela
ted to Hurwitz moduli spaces (including older results with Faber on tautol
ogical classes and newer calculations with Cela and Schmitt on Tevelev deg
rees).\n
LOCATION:https://researchseminars.org/talk/HUBerlinAG/21/
URL:https://hu-berlin.zoom.us/meeting/register/u5ItdOuqrTMrHNY8J0yFSvw9pxK
l8ZxAyMQG
END:VEVENT
BEGIN:VEVENT
SUMMARY:Salim Tayou (Harvard University)
DTSTART;VALUE=DATE-TIME:20210519T150000Z
DTEND;VALUE=DATE-TIME:20210519T160000Z
DTSTAMP;VALUE=DATE-TIME:20210514T191359Z
UID:HUBerlinAG/22
DESCRIPTION:Title: Equidistribution of Hodge loci\nby Salim Tayou (Harvard University
) as part of Humboldt Algebraic Geometry Seminar\n\nInteractive livestream
: https://hu-berlin.zoom.us/meeting/register/u5ItdOuqrTMrHNY8J0yFSvw9pxKl8
ZxAyMQG\nPassword hint: The order of the Weyl group of E6\n\nAbstract\nGiv
en a polarized variation of Hodge structures\, it is a classical result th
at the Hodge locus is a countable union of proper algebraic subvarieties.
In this talk\, I will explain a general equidistribution theorem for these
Hodge loci and explain several applications: equidistribution of higher c
odimension Noether-Lefschetz loci\, equidistribution of Hecke translates o
f a curve in $A_g$ and equidistribution of some families of CM points in S
himura varieties. The results of this talk are joint work with Nicolas Tho
lozan.\n
LOCATION:https://researchseminars.org/talk/HUBerlinAG/22/
URL:https://hu-berlin.zoom.us/meeting/register/u5ItdOuqrTMrHNY8J0yFSvw9pxK
l8ZxAyMQG
END:VEVENT
BEGIN:VEVENT
SUMMARY:François Greer (Stony Brook University)
DTSTART;VALUE=DATE-TIME:20210505T140000Z
DTEND;VALUE=DATE-TIME:20210505T150000Z
DTSTAMP;VALUE=DATE-TIME:20210514T191359Z
UID:HUBerlinAG/23
DESCRIPTION:Title: A tale of two Severi curves\nby François Greer (Stony Brook Unive
rsity) as part of Humboldt Algebraic Geometry Seminar\n\n\nAbstract\nLet $
(S\,L)$ be a general polarized K3 surface of degree $2g-2$. A general memb
er of the linear system $|L|\\simeq \\mathbb P^g$ is a smooth curve of gen
us $g$. For $0\\leq h\\leq g$\, define the Severi variety $V_h(S\,L)\\subs
et |L|$ to be the locus of curves with geometric genus $\\leq h$. As expec
ted\, $V_h(S\,L)$ has dimension $h$. We consider the case $h=1$\, where th
e Severi variety is a (singular) curve. Our first result is that the geome
tric genus of $V_1(S\,L)$ goes to infinity with $g$\; we give a lower boun
d $\\sim e^{c\\sqrt{g}}$. Next we consider the analogous question for Seve
ri curves of a rational elliptic surface\, and give a polynomial upper bou
nd instead. Modular forms play a central role in both arguments.\n
LOCATION:https://researchseminars.org/talk/HUBerlinAG/23/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Gerard Freixas i Montplet (IMJ-PRG)
DTSTART;VALUE=DATE-TIME:20210616T140000Z
DTEND;VALUE=DATE-TIME:20210616T150000Z
DTSTAMP;VALUE=DATE-TIME:20210514T191359Z
UID:HUBerlinAG/24
DESCRIPTION:by Gerard Freixas i Montplet (IMJ-PRG) as part of Humboldt Alg
ebraic Geometry Seminar\n\nInteractive livestream: https://hu-berlin.zoom.
us/meeting/register/u5ItdOuqrTMrHNY8J0yFSvw9pxKl8ZxAyMQG\nPassword hint: T
he order of the Weyl group of E6\nAbstract: TBA\n
LOCATION:https://researchseminars.org/talk/HUBerlinAG/24/
URL:https://hu-berlin.zoom.us/meeting/register/u5ItdOuqrTMrHNY8J0yFSvw9pxK
l8ZxAyMQG
END:VEVENT
BEGIN:VEVENT
SUMMARY:David Holmes (University of Leiden)
DTSTART;VALUE=DATE-TIME:20210609T140000Z
DTEND;VALUE=DATE-TIME:20210609T150000Z
DTSTAMP;VALUE=DATE-TIME:20210514T191359Z
UID:HUBerlinAG/25
DESCRIPTION:Title: The double-double ramification cycle\nby David Holmes (University
of Leiden) as part of Humboldt Algebraic Geometry Seminar\n\nInteractive l
ivestream: https://hu-berlin.zoom.us/meeting/register/u5ItdOuqrTMrHNY8J0yF
Svw9pxKl8ZxAyMQG\nPassword hint: The order of the Weyl group of E6\n\nAbst
ract\nA basic question in the geometry of Riemann surfaces is to decide wh
en a given divisor of degree 0 is the divisor of a rational function (is p
rincipal). In the 19th century Abel and Jacobi gave a beautiful solution:
one writes the divisor as the boundary of a 1-cycle\, and the divisor is p
rincipal if and only if every holomorphic differential integrates to zero
against this cycle. From a modern perspective it is natural to allow the c
urve and divisor to vary in a family\, perhaps allowing the curve to degen
erate to a singular (stable) curve so that the corresponding moduli space
is compact. The double ramification cycle can then be seen as a virtual fu
ndamental class of the locus in the moduli space of curves over which our
divisor becomes principal. We will focus on two basic questions: where doe
s the double ramification cycle naturally live\, and what happens when we
intersect two double ramification cycles? We will see why (logarithmically
) blowing up the moduli space can make life easier. This is joint work wit
h Rosa Schwarz\, building on earlier joint work with Aaron Pixton and Joha
nnes Schmitt.\n
LOCATION:https://researchseminars.org/talk/HUBerlinAG/25/
URL:https://hu-berlin.zoom.us/meeting/register/u5ItdOuqrTMrHNY8J0yFSvw9pxK
l8ZxAyMQG
END:VEVENT
END:VCALENDAR