Previous Conferences & Workshops

May
03
2012

Joint IAS/Princeton University Number Theory Seminar

Eisenstein Series on Exceptional Groups, Graviton Scattering Amplitudes, and the Unitary Dual
Stephen D. Miller
4:30pm|S-101

I will describe the appearance of special values of Eisenstein series on E6, E7, and E8 that arose in studying the low energy expansion of the 4-graviton scattering amplitude in string theory (see arxiv:1004.0163 and 1111.2983). Through methods to...

May
01
2012

Computer Science/Discrete Mathematics Seminar II

Lower Bounds for Matching Vector Codes
Abhishek Bhowmick
10:30am|S-101

We prove new lower bounds on the encoding length of Matching Vector (MV) codes. These recently discovered families of Locally Decodable Codes (LDCs) originate in the works of Yekhanin and Efremenko and are the only known families of LDCs with a...

Apr
30
2012

Computer Science/Discrete Mathematics Seminar I

Randomized Greedy Algorithms for the Maximum Matching Problem with New Analysis
11:15am|S-101

It is a long-standing problem to lower bound the performance of randomized greedy algorithms for maximum matching. Aronson, Dyer, Frieze and Suen in1995 studied the modified randomized greedy (MRG) algorithm and proved that it approximates the...

Apr
26
2012

Joint IAS/Princeton University Number Theory Seminar

Deligne-Lusztig Theory for Unipotent Groups and the Local Langlands Correspondence
Mitya Boyarchenko
4:30pm|Fine Hall -- 214
  1. A (very) special case of Deligne-Lusztig theory yields a construction of cuspidal irreducible representations of the finite group $GL_n(\mathbb F_q)$ in the cohomology of an algebraic variety equipped with an action of $GL_n(\mathbb F_q)$. There...
Apr
24
2012

Computer Science/Discrete Mathematics Seminar II

Pseudorandom Generators for Read-Once ACC^0
10:30am|S-101

We consider the problem of constructing pseudorandom generators for read-once circuits. We give an explicit construction of a pseudorandom generator for the class of read-once constant depth circuits with unbounded fan-in AND, OR, NOT and...

Apr
23
2012

Computer Science/Discrete Mathematics Seminar I

Computational Entropy
11:15am|S-101

Shannon's notion of entropy measures the amount of "randomness" in a process. However, to an algorithm with bounded resources, the amount of randomness can appear to be very different from the Shannon entropy. Indeed, various measures of...

Apr
19
2012

Joint IAS/Princeton University Number Theory Seminar

Multiple Zeta Values
4:30pm|S-101

I will report on some recent work on multiple zeta values. I will sketch the definition of motivic multiple zeta values, which can be viewed as a prototype of a Galois theory for certain transcendental numbers, and then explain how they were used to...