Previous Conferences & Workshops
Cycles and Cliques Minors in Expanders
Benny Sudakov
Let $G$ be a graph which contains no subgraphs isomorphic to
fixed bipartite graph $H$. Using well known results from Extremal
Graph theory, one can show that such $G$ has certain expansion
properties, i.e., all small subsets of $G$ have large...
On the Geometric Langlands Functoriality for the Dual Pair Sp_{2n}, SO_{2m}
I will report on a the following work in progress. Let X be a
smooth connected curve over an algebraically closed field. Consider
the dual pair H=SO_{2m}, G=Sp_{2n} over X with H split. Let Bun_G
and Bun_H be the stacks of G-torsors and H-torsors on...
Approximation Algorithms for Combinatorial Allocation Problems
In combinatorial allocation, m items are to be assigned to n
players so that their total utility is maximized. This problem has
many variants depending on the utility functions involved and
possible additional constraints. We consider two variants...
The Unitary Group Continued: The Case of Tranversal Intersection
Periods and Relative Trace Formulas for GL(2) in the Local Setting
4:30pm|Princeton University, Fine Hall 214
Witten Equation and Singularity Theory
Yongbin Ruan
In 1991, Witten proposed a famous conjecture (solved by
Kontsevich) related the intersection theory of Deligne-Mumford
moduli space to KDV-integrable hierearchy. To generalize his
conjecture, Witten proposed a remarkable PDE based any...
Using Rost Motives to Prove Bloch-Kato
The Renormalisation Group II
This is continuation of the previous seminar in which the
formulation of the renormalisation group is given in more detail: a
space of statistical mechanical models is defined. The
renormalisation group is a map on this space and there is a
basic...
On the Correlation Between Parity and Modular Polynomials
We consider the problem of bounding the absolute value of the
correlation between parity and low-degree polynomials modulo q, for
odd q >= 3. The boolean function corresponding to the polynomial
is 0 on an input iff the polynomial evaluates to 0...
The Renormalisation Group I
A very long random walk, seen from so far away that individual
steps cannot be resolved, is the continuous random path called
Brownian motion. This is a rough statement of Donsker's theorem and
it is an example of how models in statistical mechanics...