January 30

Title: Kac-Weisfeiler
conjecture for
Lie superalgebras in prime characteristic: formulation and proof

Speaker: Lei Zhao (UVa)

February 6

Title: Commensurators of profinite groups

Speaker: Mikhail Ershov
(UVa)

February 13

Title: The action of automorphisms of finite
p-groups on group cohomology.

Speaker: Nick Kuhn (UVa)

February 20

Title: Quadratic
syzygies of transvectants

Speaker: Jaydeep Chipalkatti
(University of Manitoba, Canada)

February 27

Title: Minimal
isotropic simple Q-groups of higher real rank

Speaker: Dave Morris (University of
Lethbridge, Canada)

March 5

No talk
(
Spring break )

March 12

Title: Computing
generic character tables

Speaker: Frank Lubeck (Aachen,
Germany)

March 19

Title: Kostant
homology formulas for oscillator
modules of Lie superalgebras

Speaker: Shun-Jen Cheng (Academia
Sinica, Taiwan)

March 26

Title: Limits
and Colimits in Abelian Categories

Speaker: Jason McCarty (UVa)

April 2

Title: Modular
invariant representations of W-algebras

Speaker: Tomoyuki Arakawa (Nara
Women’s University, Japan)

April 9 No talk

April 14 (Monday,
Ker 317:
note the special date)

Title:
H^{3} and Gerbal extensions

Speaker: Xinwen Zhu (UC
Berkeley)

April 18 (Friday,
Ker 326:
note the special date/place)

Title:
Counting maximal lattices

Speaker: Alireza Salehi Golsefidy
(Princeton)

April 25 (Friday:
note the special date)

Title: Affineness of some Deligne-Lusztig
varieties

Speaker: Xuhua He (StonyBrook)

Abstract: Deligne-Lusztig varieties are
some locally closed subvarieties of a flag variety. They were
introduced by Deligne and Lusztig in 1976 and play a key role in the study of
representations of finite groups of Lie type. An open problem is
whether or not all the Deligne-Lusztig varieties are affine varieties.
In this talk, we will discuss some recent progress
on this problem. If time allows, we will also discuss some
generalization of Deligne-Lusztig varieties to partial flag varieties.

April 30

Title: Modular branching rules of wreath
Hecke algebras and affine
crystal graphs

Speaker: Jinkui Wan (UVa)

Abstract: We introduce a generalization
of degenerate affine Hecke algebra, called wreath Hecke algebra (WHA).
The simple modules of WHA and of related cyclotomic algebras are classified over any
chararacteristic. The modular branching rule for these algebras is
obtained and identified with crystal graphs of quantum affine algebras.

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