Previous Conferences & Workshops

Feb
08
2005

Computer Science/Discrete Mathematics Seminar II

Forcing with Random Variables
10:30am|S-101

The links between propositional proof systems and bounded arithmetic (a generic name for a collection of first-order theories of arithmetic) have many facets but informally one can view them as two sides of the same thing: The former is a non...

Feb
07
2005

Computer Science/Discrete Mathematics Seminar I

Embedding Almost Spanning Bounded Degree Trees
11:15am|S-101

We derive a sufficient condition for a sparse graph G on n vertices to contain a copy of a tree T of maximum degree at most d on (1-\epsilon)n vertices, in terms of the expansion properties of G. As a result we show that for fixed d>=2 and 0

Feb
01
2005

Computer Science/Discrete Mathematics Seminar II

Geometric symmetrizations in high dimension
10:30am|S-101

A classical method for proving geometric inequalities in which the Euclidean ball is the extremal case, is that of symmetrization. The idea is basically to perform a simple operation on a given convex body in n-dimensional space, which makes it more...

Jan
31
2005

Members’ Seminar

Approximation algorithms and Grothendieck type inequalities
4:00pm|S-101

I will describe a connection between a classical inequality of Grothendieck and approximation algorithms based on semi-definite programming. The investigation of this connection suggests the definition of a new graph parameter, called the...

Jan
31
2005

Computer Science/Discrete Mathematics Seminar I

Extremal graphs, recursive functions and a separation theorem in property testing
Asaf Shapira
11:15am|S-10

A graph property P is said to be uniformly-testable if there is a property-tester for P that receives the error parameter \epsilon as part of the input, and whose query complexity is a function of \epsilon only. P is said to be non-uniformly...

Jan
27
2005

Algebraic Groups and Convexity Seminar

Equivariant localization and quot schemes
8:00pm|S-101

Equivariant localization provides a powerful method for explicitly computing equivariant and ordinary cohomology rings of spaces with large symmetry groups. One of the most useful localization formulas, due to Goresky-Kottwitz-MacPherson, describes...