
Nir Gadish
Mon Mar 19, 2018
4:00 pm
Hyperplane arrangements are a classical meeting point of topology, combinatorics and representation theory. Generalizing to arrangements of linear subspaces of arbitrary codimension, the theory becomes much more complicated. However, a crucial observation is that many natural sequences of arrangements seem to be defined using a finite amount of...

Nir Gadish
Mon Mar 19, 2018
4:00 pm
Hyperplane arrangements are a classical meeting point of topology, combinatorics and representation theory. Generalizing to arrangements of linear subspaces of arbitrary codimension, the theory becomes much more complicated. However, a crucial observation is that many natural sequences of arrangements seem to be defined using a finite amount of...

Lê Thái Hoàng
Thu Mar 15, 2018
3:00 pm
The Möbius randomness principle states that the Möbius function μ does not correlate with simple or low complexity sequences F(n), that is, we have nontrivial bounds for sums ∑ μ(n) F(n).
By analogy between the integers and the ring F_q[t] of polynomials over a finite field F_q, we study this principle in the latter...

Bernhard Lamel
Tue Mar 13, 2018
4:00 pm
It is a striking phenomenon of formal maps between realanalytic hypersurfaces that in many circumstances they actually converge. In recent work with Nordine Mir, we were able to characterise (in a suitable sense) divergent maps, leading to many new convergence results. We will discuss these recent results.

Josh Benaloh, Alex Halderman, Hovav Shacham
Tue Mar 13, 2018
3:30 pm
Event on Elections and Voting, with Panels on the Technology, Law, & Policy of Election Hacking, 1:30  7:30 pm
The Technology of Voting: Risks & Opportunities
Josh Benaloh (Microsoft Research)
Alex Halderman (University of Michigan)
Hovav Shacham (UC San Diego)
Panel moderated by Alice Silverberg (UC Irvine), 3:30 pm  4:40 pm
Keynote...

Matthew Gursky
Tue Mar 13, 2018
3:00 pm
In this talk I will describe a singular boundary value problem for Einstein metrics. This problem arises in the FeffermanGraham theory of conformal invariants, and in the AdS/CFT correspondence. After giving a brief overview of some important results and examples, I will present a recent construction of boundary data which cannot...

Victor Kleptsyn
Tue Mar 13, 2018
1:00 pm
The study of the equation on the 2torus given by
x’= sin x + a + b sin t
has been motivated by its relation to the Josephson junction in physics, as well as by purely mathematical reasons. For any values of the parameters a and b, one can consider the time2\pi (period) map from the xcircle to itself, and study...