BEGIN:VCALENDAR
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PRODID:researchseminars.org
CALSCALE:GREGORIAN
X-WR-CALNAME:researchseminars.org
BEGIN:VEVENT
SUMMARY:Stefan Patrikis (Ohio State Univ.)
DTSTART;VALUE=DATE-TIME:20200922T170000Z
DTEND;VALUE=DATE-TIME:20200922T180000Z
DTSTAMP;VALUE=DATE-TIME:20210419T095224Z
UID:UAANTS/1
DESCRIPTION:Title: L
ifting Galois representations\nby Stefan Patrikis (Ohio State Univ.) a
s part of University of Arizona Algebra and Number Theory Seminar\n\n\nAbs
tract\nI will survey joint work with Najmuddin Fakhruddin and Chandrashekh
ar Khare in which we prove in many cases existence of geometric p-adic lif
ts of "odd" mod p Galois representations\, valued in general reductive gro
ups. Then I will discuss applications to modularity of reducible mod p Gal
ois representations.\n
LOCATION:https://researchseminars.org/talk/UAANTS/1/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Wanlin Li (MIT)
DTSTART;VALUE=DATE-TIME:20200929T210000Z
DTEND;VALUE=DATE-TIME:20200929T220000Z
DTSTAMP;VALUE=DATE-TIME:20210419T095224Z
UID:UAANTS/2
DESCRIPTION:Title: T
he Ceresa class: tropical\, topological\, and algebraic\nby Wanlin Li
(MIT) as part of University of Arizona Algebra and Number Theory Seminar\n
\n\nAbstract\nThe Ceresa cycle is an algebraic cycle attached to a smooth
algebraic curve\, which is trivial in the Chow ring when the curve is hype
relliptic. Its image under a cycle class map provides a class in étale co
homology called the Ceresa class. There are few examples where the Ceresa
class is known for non-hyperelliptic curves. We explain how to define a Ce
resa class for a tropical algebraic curve\, and also for a Riemann surface
endowed with a multiset of commuting Dehn twists (where it is related to
the Morita cocycle on the mapping class group). Finally\, we explain how t
hese are related to the Ceresa class of a smooth algebraic curve over C((t
))\, and show that in this setting the Ceresa class is torsion.\n
LOCATION:https://researchseminars.org/talk/UAANTS/2/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Jessica Fintzen (Univ. of Cambridge)
DTSTART;VALUE=DATE-TIME:20201006T170000Z
DTEND;VALUE=DATE-TIME:20201006T180000Z
DTSTAMP;VALUE=DATE-TIME:20210419T095224Z
UID:UAANTS/3
DESCRIPTION:Title: R
epresentations of p-adic groups and applications\nby Jessica Fintzen (
Univ. of Cambridge) as part of University of Arizona Algebra and Number Th
eory Seminar\n\n\nAbstract\nThe Langlands program is a far-reaching collec
tion of conjectures that relate different areas of mathematics including n
umber theory and representation theory. A fundamental problem on the repre
sentation theory side of the Langlands program is the construction of all
(irreducible\, smooth\, complex) representations of p-adic groups. I will
provide an overview of our understanding of the representations of p-adic
groups\, with an emphasis on recent progress.\n\nI will also outline how n
ew results about the representation theory of p-adic groups can be used to
obtain congruences between arbitrary automorphic forms and automorphic fo
rms which are supercuspidal at p\, which is joint work with Sug Woo Shin.
This simplifies earlier constructions of attaching Galois representations
to automorphic representations\, i.e. the global Langlands correspondence\
, for general linear groups. Moreover\, our results apply to general p-adi
c groups and have therefore the potential to become widely applicable beyo
nd the case of the general linear group.\n
LOCATION:https://researchseminars.org/talk/UAANTS/3/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Francesc Castella (UCSB)
DTSTART;VALUE=DATE-TIME:20201027T210000Z
DTEND;VALUE=DATE-TIME:20201027T220000Z
DTSTAMP;VALUE=DATE-TIME:20210419T095224Z
UID:UAANTS/4
DESCRIPTION:Title: I
wasawa theory of elliptic curves at Eisenstein primes and applications
\nby Francesc Castella (UCSB) as part of University of Arizona Algebra and
Number Theory Seminar\n\n\nAbstract\nIn the study of Iwasawa theory of el
liptic curves $E/\\mathbb{Q}$\, it is often assumed that $p$ is a non-Eise
nstein prime\, meaning that $E[p]$ is irreducible as a $G_{\\mathbb{Q}}$-m
odule. Because of this\, most of the recent results on the $p$-converse to
the theorem of Gross–Zagier and Kolyvagin (following Skinner and Wei Zh
ang) and on the $p$-part of the Birch–Swinnerton-Dyer formula in analyti
c rank 1 (following Jetchev–Skinner–Wan) were only known for non-Eisen
stein primes $p$. In this talk\, I’ll explain some of the ingredients in
a joint work with Giada Grossi\, Jaehoon Lee\, and Christopher Skinner in
which we study the (anticyclotomic) Iwasawa theory of elliptic curves ove
r $\\mathbb{Q}$ at Eisenstein primes. As a consequence of our study\, we o
btain an extension of the aforementioned results to the Eisenstein case. I
n particular\, for $p=3$ this leads to an improvement on the best known re
sults towards Goldfeld’s conjecture in the case of elliptic curves over
$\\mathbb{Q}$ with a rational $3$-isogeny.\n
LOCATION:https://researchseminars.org/talk/UAANTS/4/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Thomas Gemuenden (ETH Zurich)
DTSTART;VALUE=DATE-TIME:20201103T170000Z
DTEND;VALUE=DATE-TIME:20201103T180000Z
DTSTAMP;VALUE=DATE-TIME:20210419T095224Z
UID:UAANTS/5
DESCRIPTION:Title: N
on-Abelian Orbifold Theory\nby Thomas Gemuenden (ETH Zurich) as part o
f University of Arizona Algebra and Number Theory Seminar\n\n\nAbstract\nI
n this talk\, we will discuss the theory of holomorphic extensions of non-
abelian orbifold vertex operator algebras. We will give a brief overview o
f the concepts and motivations of vertex operator algebras and their modul
es. Then we will construct the module category of non-abelian orbifold ver
tex operator algebras and classify their holomorphic extensions. If time p
ermits we will prove that there exist holomorphic vertex operator algebras
at central charge 72 that cannot be constructed as a holomorphic extensio
n of a cyclic orbifold of a lattice vertex operator algebra.\n
LOCATION:https://researchseminars.org/talk/UAANTS/5/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Melissa Emory (Univ. of Toronto)
DTSTART;VALUE=DATE-TIME:20201110T210000Z
DTEND;VALUE=DATE-TIME:20201110T220000Z
DTSTAMP;VALUE=DATE-TIME:20210419T095224Z
UID:UAANTS/6
DESCRIPTION:Title: A
multiplicity one theorem for general spin groups\nby Melissa Emory (U
niv. of Toronto) as part of University of Arizona Algebra and Number Theor
y Seminar\n\n\nAbstract\nA classical problem in representation theory is h
ow a\nrepresentation of a group decomposes when restricted to a subgroup.
In the\n1990s\, Gross-Prasad formulated a conjecture regarding the\nrestri
ction of representations\, also known as branching laws\, of special\north
ogonal groups. Gan\, Gross and Prasad extended this conjecture\, now\nkno
wn as the local Gan-Gross-Prasad (GGP) conjecture\, to the remaining\nclas
sical groups. There are many ingredients needed to prove a local GGP\nconj
ecture. In this talk\, we will focus on the first ingredient: a\nmultipli
city at most one theorem.\nAizenbud\, Gourevitch\, Rallis and Schiffmann p
roved a multiplicity at\nmost one theorem for restrictions of irreducible
representations of\ncertain p-adic classical groups and Waldspurger proved
the same theorem\nfor the special orthogonal groups. We will discuss work
that establishes a\nmultiplicity at most one theorem for restrictions of
irreducible\nrepresentations for a non-classical group\, the general spin
group. This is\njoint work with Shuichiro Takeda.\n
LOCATION:https://researchseminars.org/talk/UAANTS/6/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Andrea Dotto (Univ. of Chicago)
DTSTART;VALUE=DATE-TIME:20201117T210000Z
DTEND;VALUE=DATE-TIME:20201117T220000Z
DTSTAMP;VALUE=DATE-TIME:20210419T095224Z
UID:UAANTS/7
DESCRIPTION:Title: M
od p Bernstein centres of p-adic groups\nby Andrea Dotto (Univ. of Chi
cago) as part of University of Arizona Algebra and Number Theory Seminar\n
\n\nAbstract\nThe centre of the category of smooth mod p representations o
f a p-adic reductive group does not distinguish the blocks of finite lengt
h representations\, in contrast with Bernstein's theory in characteristic
zero. Motivated by this observaton and the known connections between the B
ernstein centre and the local Langlands correspondence in families\, we co
nsider the case of GL_2(Q_p) and we prove that its category of representat
ions extends to a stack on the Zariski site of a simple geometric object:
a chain X of projective lines\, whose points are in bijection with Paskuna
s's blocks. Taking the centre over each open subset we obtain a sheaf of r
ings on X\, and we expect the resulting space to be closely related to the
Emerton--Gee stack for 2-dimensional representations of the absolute Galo
is group of Q_p. Joint work in progress with Matthew Emerton and Toby Gee.
\n
LOCATION:https://researchseminars.org/talk/UAANTS/7/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Aaron Pollack (UCSD)
DTSTART;VALUE=DATE-TIME:20201124T210000Z
DTEND;VALUE=DATE-TIME:20201124T220000Z
DTSTAMP;VALUE=DATE-TIME:20210419T095224Z
UID:UAANTS/8
DESCRIPTION:Title: S
ingular modular forms on quaternionic E_8\nby Aaron Pollack (UCSD) as
part of University of Arizona Algebra and Number Theory Seminar\n\n\nAbstr
act\nThe exceptional group $E_{7\,3}$ has a symmetric space with Hermitian
tube structure. On it\, Henry Kim wrote down low weight holomorphic modul
ar forms that are "singular" in the sense that their Fourier expansion has
many terms equal to zero. The symmetric space associated to the exception
al group $E_{8\,4}$ does not have a Hermitian structure\, but it has what
might be the next best thing: a quaternionic structure and associated "mod
ular forms". I will explain the construction of singular modular forms on
$E_{8\,4}$\, and the proof that these special modular forms have rational
Fourier expansions\, in a precise sense. This builds off of work of Wee Te
ck Gan and uses key input from Gordan Savin.\n
LOCATION:https://researchseminars.org/talk/UAANTS/8/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Yuan Liu (Univ. of Michigan)
DTSTART;VALUE=DATE-TIME:20201201T210000Z
DTEND;VALUE=DATE-TIME:20201201T220000Z
DTSTAMP;VALUE=DATE-TIME:20210419T095224Z
UID:UAANTS/9
DESCRIPTION:Title: P
resentations of Galois groups of maximal extensions with restricted ramifi
cations\nby Yuan Liu (Univ. of Michigan) as part of University of Ariz
ona Algebra and Number Theory Seminar\n\n\nAbstract\nIn this talk\, we are
going to discuss how to use Galois cohomology to study the presentation o
f Galois groups of maximal extensions with restricted ramifications. In pr
evious work with Melanie Matchett Wood and David Zureick-Brown\, we conjec
ture that an explicitly-defined random profinite group model can predict t
he distribution of the Galois groups of maximal unramified extension of gl
obal fields that range over $\\Gamma$-extensions of $\\mathbb{Q}$ or $\\ma
thbb{F}_q(t)$. In the function field case\, our conjecture is supported by
the moment computation\, but very little is known in the number field cas
e. Interestingly\, our conjecture suggests that the random group should si
mulate the maximal unramified Galois groups\, and hence suggests some part
icular requirements on the structure of these Galois groups. In this talk\
, we will prove that the maximal unramified Galois groups are always achie
vable by our random group model\, which verifies those interesting require
ments.\n
LOCATION:https://researchseminars.org/talk/UAANTS/9/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Aaron Wootton (Univ. of Arizona)
DTSTART;VALUE=DATE-TIME:20201208T210000Z
DTEND;VALUE=DATE-TIME:20201208T220000Z
DTSTAMP;VALUE=DATE-TIME:20210419T095224Z
UID:UAANTS/10
DESCRIPTION:Title:
Non-Abelian simple groups act with almost all signatures\nby Aaron Woo
tton (Univ. of Arizona) as part of University of Arizona Algebra and Numbe
r Theory Seminar\n\n\nAbstract\nThe topological data of a finite group $G$
acting conformally on a compact Riemann surface is often encoded using a
tuple of non-negative integers $(h\;m_1\,\\ldots \,m_s)$ called its signa
ture\, where the $m_i$ are orders of non-trivial elements in the group. Th
ere are two easily verifiable arithmetic conditions on a tuple which are n
ecessary for it to be a signature of some group action. We derive necessar
y and sufficient conditions on a group for the situation where all but fin
itely many tuples that satisfy these arithmetic conditions actually occur
as the signature for an action of $G$ on some Riemann surface. As a conseq
uence\, we show that all non-abelian finite simple groups exhibit this pro
perty.\n
LOCATION:https://researchseminars.org/talk/UAANTS/10/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Robin Bartlett (Univ. of Münster)
DTSTART;VALUE=DATE-TIME:20210209T170000Z
DTEND;VALUE=DATE-TIME:20210209T180000Z
DTSTAMP;VALUE=DATE-TIME:20210419T095224Z
UID:UAANTS/11
DESCRIPTION:Title:
Some Breuil-Mezard identities in moduli spaces of Breuil-Kisin modules
\nby Robin Bartlett (Univ. of Münster) as part of University of Arizona A
lgebra and Number Theory Seminar\n\n\nAbstract\nThe Breuil--Mezard conject
ure predicts certain identities between cycles in moduli spaces of mod p G
alois representations in terms of the Fp-representation theory of GLn(Fq).
\n\nIn this talk I will discuss work in progress which considers the situt
ation arising from (the reduction modulo p of) two dimensional crystalline
Galois representation with suitably small* Hodge--Tate weights. We will d
iscuss how the predected identities can also seen in ``resolutions`` of th
ese spaces of Galois representations described in terms of semilinar algeb
ra.\n\n*small will be precisely the bound which ensures that the Fp-repres
entation theory of GL2(Fq) appearing behaves precisely as it would with ch
ar 0 coefficients.\n
LOCATION:https://researchseminars.org/talk/UAANTS/11/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Carl Wang Erickson (Univ. of Pittsburgh)
DTSTART;VALUE=DATE-TIME:20210223T210000Z
DTEND;VALUE=DATE-TIME:20210223T220000Z
DTSTAMP;VALUE=DATE-TIME:20210419T095224Z
UID:UAANTS/12
DESCRIPTION:Title:
Small non-Gorenstein residually Eisenstein Hecke algebras\nby Carl Wan
g Erickson (Univ. of Pittsburgh) as part of University of Arizona Algebra
and Number Theory Seminar\n\n\nAbstract\nIn Mazur's work proving the torsi
on theorem for rational elliptic curves\, he studied congruences between c
usp forms and Eisenstein series in weight two and prime level. One of his
innovations was to measure such congruences using a residually Eisenstein
Hecke algebra. He asked for generalizations of his theory to squarefree le
vels. The speaker made progress toward such generalizations in joint work
with Preston Wake\; however\, a crucial condition in their work was that t
he Hecke algebra be Gorenstein\, which is often but by no means always tru
e. We present joint work with Catherine Hsu and Preston Wake in which we s
tudy the smallest possible non-Gorenstein case and leverage this smallness
to draw an explicit link between its size and an invariant from algebraic
number theory.\n
LOCATION:https://researchseminars.org/talk/UAANTS/12/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Chao Li (Columbia Univ.)
DTSTART;VALUE=DATE-TIME:20210126T210000Z
DTEND;VALUE=DATE-TIME:20210126T220000Z
DTSTAMP;VALUE=DATE-TIME:20210419T095224Z
UID:UAANTS/13
DESCRIPTION:Title:
Beilinson-Bloch conjecture for unitary Shimura varieties\nby Chao Li (
Columbia Univ.) as part of University of Arizona Algebra and Number Theory
Seminar\n\n\nAbstract\nFor certain automorphic representations $\\pi$ on
unitary groups\, we show that if $L(s\, \\pi)$ vanishes to order one at th
e center $s=1/2$\, then the associated $\\pi$-localized Chow group of a un
itary Shimura variety is nontrivial. This proves part of the Beilinson-Blo
ch conjecture for unitary Shimura varieties\, which generalizes the BSD co
njecture. Assuming the modularity of Kudla's generating series of special
cycles\, we further prove a precise height formula for $L'(1/2\, \\pi)$. T
his proves the conjectural arithmetic inner product formula\, which genera
lizes the Gross-Zagier formula to Shimura varieties of higher dimension. W
e will motivate these conjectures and discuss some aspects of the proof. T
his is joint work with Yifeng Liu.\n
LOCATION:https://researchseminars.org/talk/UAANTS/13/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Yong-Suk Moon (Univ. of Arizona)
DTSTART;VALUE=DATE-TIME:20210216T210000Z
DTEND;VALUE=DATE-TIME:20210216T220000Z
DTSTAMP;VALUE=DATE-TIME:20210419T095224Z
UID:UAANTS/14
DESCRIPTION:Title:
Relative Fontaine-Messing theory over power series rings\nby Yong-Suk
Moon (Univ. of Arizona) as part of University of Arizona Algebra and Numbe
r Theory Seminar\n\n\nAbstract\nLet k be a perfect field of char p > 2. Fo
r a smooth proper scheme over W(k)\, Fontaine-Messing theory gives a nice
way to compare its torsion crystalline cohomology H^i_cris and torsion eta
le cohomology H^i_et when i < p-1. We will explain how one can generalize
Fontaine-Messing theory in the relative setting over power series rings\,
and discuss some applications. This is joint work with Tong Liu and Deepam
Patel.\n
LOCATION:https://researchseminars.org/talk/UAANTS/14/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Andreas Mihatsch (Univ. of Bonn)
DTSTART;VALUE=DATE-TIME:20210323T170000Z
DTEND;VALUE=DATE-TIME:20210323T180000Z
DTSTAMP;VALUE=DATE-TIME:20210419T095224Z
UID:UAANTS/15
DESCRIPTION:Title:
AFL over F\nby Andreas Mihatsch (Univ. of Bonn) as part of University
of Arizona Algebra and Number Theory Seminar\n\n\nAbstract\nI will report
on the recent proof of the AFL over a general p-adic local field (p > n).
The previous proof of the AFL (due to W. Zhang) was restricted to Q_p sinc
e it relied on the modularity of Kudla divisor generating series on integr
al models of unitary Shimura varieties\, which is only known over Q. The n
ew proof merely requires modularity for the generic fiber generating serie
s\, allowing us to work with an arbitrary totally real field. This is join
t work with W. Zhang.\n
LOCATION:https://researchseminars.org/talk/UAANTS/15/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Congling Qiu (Yale Univ.)
DTSTART;VALUE=DATE-TIME:20210406T210000Z
DTEND;VALUE=DATE-TIME:20210406T220000Z
DTSTAMP;VALUE=DATE-TIME:20210419T095224Z
UID:UAANTS/16
DESCRIPTION:Title:
Modularity and Heights of CM cycles on Kuga-Sato varieties\nby Conglin
g Qiu (Yale Univ.) as part of University of Arizona Algebra and Number The
ory Seminar\n\n\nAbstract\nWe study CM cycles on Kuga-Sato varieties over
X(N). Our first result is the modularity of the unramified Hecke module
generated by CM cycles. This result enable us to decompose the space of C
M cycles according to the unramified Hecke action. Our second result is t
he full modularity of all CM cycles in the components of representations w
ith vanishing central (base change) L-values. Finally\, we prove a higher
weight analog of the general Gross-Zagier formula of Yuan\, S. Zhang and W
. Zhang.\n
LOCATION:https://researchseminars.org/talk/UAANTS/16/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Jason Quinones (Gallaudet Univ.)
DTSTART;VALUE=DATE-TIME:20210413T210000Z
DTEND;VALUE=DATE-TIME:20210413T220000Z
DTSTAMP;VALUE=DATE-TIME:20210419T095224Z
UID:UAANTS/17
DESCRIPTION:Title:
Slow-Growing Weak Jacobi Forms\nby Jason Quinones (Gallaudet Univ.) as
part of University of Arizona Algebra and Number Theory Seminar\n\n\nAbst
ract\nWeak Jacobi forms of weight 0 can be exponentially lifted to meromor
phic Siegel paramodular forms. It was recently observed that the Fourier c
oefficients of such lifts are then either fast growing or slow growing. Th
ose weak Jacobi forms with slow growing behavior could describe the ellipt
ic genus of a CFT whose symmetric orbifold exhibits a slow supergravity-li
ke growth. In this talk\, we investigate the space of weak Jacobi forms th
at lead to slow growth. We provide analytic and numerical evidence for the
conjecture that there are such slow growing forms for any index.\n
LOCATION:https://researchseminars.org/talk/UAANTS/17/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Yihang Zhu (Univ. of Maryland)
DTSTART;VALUE=DATE-TIME:20210420T210000Z
DTEND;VALUE=DATE-TIME:20210420T220000Z
DTSTAMP;VALUE=DATE-TIME:20210419T095224Z
UID:UAANTS/18
DESCRIPTION:Title:
Irreducible components of affine Deligne-Lusztig varieties\nby Yihang
Zhu (Univ. of Maryland) as part of University of Arizona Algebra and Numbe
r Theory Seminar\n\n\nAbstract\nAffine Deligne-Lusztig varieties naturally
arise from the study of Shimura varieties. We prove a formula for the num
ber of their irreducible components\, which was a conjecture of Miaofen Ch
en and Xinwen Zhu. Our method is to count the number of F_q points\, and t
o relate it to certain twisted orbital integrals. We then study the growt
h rate of these integrals using the Base Change Fundamental Lemma of Cloze
l and Labesse. In an ongoing work we also give the number of irreducible c
omponents in the basic Newton stratum of a Shimura variety. This is joint
work with Rong Zhou and Xuhua He.\n
LOCATION:https://researchseminars.org/talk/UAANTS/18/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Jiuya Wang (Duke Univ.)
DTSTART;VALUE=DATE-TIME:20210504T210000Z
DTEND;VALUE=DATE-TIME:20210504T220000Z
DTSTAMP;VALUE=DATE-TIME:20210419T095224Z
UID:UAANTS/19
DESCRIPTION:by Jiuya Wang (Duke Univ.) as part of University of Arizona Al
gebra and Number Theory Seminar\n\nAbstract: TBA\n
LOCATION:https://researchseminars.org/talk/UAANTS/19/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Yanshuai Qin (UC Berkeley)
DTSTART;VALUE=DATE-TIME:20210302T210000Z
DTEND;VALUE=DATE-TIME:20210302T220000Z
DTSTAMP;VALUE=DATE-TIME:20210419T095224Z
UID:UAANTS/20
DESCRIPTION:Title:
A relation between Brauer groups and Tate-Shafarevich groups for high dime
nsional fibrations\nby Yanshuai Qin (UC Berkeley) as part of Universit
y of Arizona Algebra and Number Theory Seminar\n\n\nAbstract\nLet $\\mathc
al{X} \\rightarrow C$ be a dominant morphism between smooth geometrically
connected varieties over a finitely generated field such that the generic
fiber $X/K$ is smooth\, projective and geometrically connected. We prove
a relation between the Tate-Shafarevich group of $Pic^0_{X/K}$ and the g
eometric Brauer groups of $ \\mathcal{X}$\, $X$ and $C$\, generalizing a t
heorem of Artin and Grothendieck for fibered surfaces to arbitrary relativ
e dimension.\n
LOCATION:https://researchseminars.org/talk/UAANTS/20/
END:VEVENT
END:VCALENDAR