Previous Conferences & Workshops
Arun Kannan
The talk covers Chapter 6 in Jantzen's book.
10:00am|Simonyi Hall 101 and Remote Access
How hard is it to tell two knots apart?
Many problems in classical topology can be formulated as
decision problems, with yes/no answer and an algorithm as a
solution. While such problems often appear to be intuitively hard,
we still know little about lower bounds on their algorithmic...
The K-ring of Steinberg varieties
3:00pm|Simonyi Hall 101 and Remote Access
In the upcoming series of talks we discuss some equivalences by
Bezrukavnikov between categories of coherent sheaves on Steinberg
varieties and of perverse sheaves on the affine flag variety. In
this talk I discuss the decategorified isomorphism...
Permutation stability of Grigorchuk groups
Tianyi Zheng
A recent result of Becker, Lubotzky and Thom characterizes, for
amenable groups, permutation stability in terms of co-soficity of
invariant random subgroups (IRS). We will explain that for a class
of amenable groups acting on rooted trees, including...
User's guide to computing with tilting modules
A basic technique in algebra, when describing a
difficult-to-approach category like Tilt, is to choose a projective
generator and study its endomorphism ring. The modern twist on this
technique is to choose the projective generator with great...
Log-concave polynomials in theory and applications - Part 2
10:30am|Simonyi Hall 101 and Remote Access - see Zoom link below
A polynomial with nonnegative coefficients is strongly
log-concave if it and all of its derivatives are log-concave as
functions on the positive orthant. This rich class of polynomials
includes many interesting examples, such as homogeneous real...
Index theorems for nodal count and a lateral variation principle
Gregory Berkolaiko
Our study is motivated by earlier results about nodal count of
Laplacian eigenfunctions on manifolds and graphs that share the
same flavor: a normalized nodal count is equal to the Morse index
of a certain energy functional at the critical point...
