Previous Conferences & Workshops

Jan
14
2013

Computer Science/Discrete Mathematics Seminar I

On Bilinear Complexity
11:15am|S-101

For a set of polynomials F, we define their bilinear complexity as the smallest k so that F lies in an ideal generated by k bilinear polynomials. The main open problem is to estimate the bilinear complexity of the single polynomial $\sum_{i,j}x_i^2...

Dec
19
2012

Special Seminar

Reflection Positivity and Infrared Bounds for Random Loop Models
Daniel Ueltschi
3:30pm|S-101

The random loop representations of Toth ('93) and Aizenman-Nachtergaele ('94) can be extended to describe certain SU(2)-invariant spin-1 Heisenberg models. Quantum spin correlations are given in terms of loop correlations. Existence of long-range...

Dec
18
2012

Computer Science/Discrete Mathematics Seminar II

The SOS (aka Lassere/Positivestellensatz/Sum-of-Squares) System
(1) Raghu Meka and (2) Avi Wigderson
10:30am|S-101

We will give an overview of this system, which has been at the center of recent algorithmic and proof complexity developments. We will give the definitions of the system (as a proof system for polynomial inequalities, and as an SDP-based algorithm)...