Previous Conferences & Workshops

Dec
07
2011

Workshop on Topology: Identifying Order in Complex Systems

Why Things Don't Fall Down, How Tensegrities Work
Robert Connelly
2:00pm|Princeton Univ., Jadwin Hall, Prin. Center for Theoretical Sciences

How do things hold up? What are the geometric ideas that are involved? One of the principles can be seen with simple models, where sticks are suspended in mid-air with inextendable cables. These were called tensegrities by Buckminster Fuller...

Dec
06
2011

Analysis Seminar

On the Ergodic Properties of Square-Free Numbers
2:30pm|S-101

I shall explain the structure of correlation functions for square-free numbers and describe a 'natural' dynamical system associated to them. Spectral analysis allows us to show that this system is metrically isomorphic to a translation on a compact...

Dec
05
2011

Computer Science/Discrete Mathematics Seminar I

Towards Coding for Maximum Errors in Interactive Communication
11:15am|S-101

We show that it is possible to encode any communication protocol between two parties so that the protocol succeeds even if a (1/4-epsilon) fraction of all symbols transmitted by the parties are corrupted adversarially, at a cost of increasing the...

Dec
02
2011

Geometry Seminar

On Seifert Fibered 4-Manifolds
1:30pm|S-101

Seifert fibered 4-manifolds are the 4-dimensional analog of Seifert 3-manifolds in that these are the 4-manifolds which admit a fixed-point free smooth circle action. In this talk I'll first review what is known and then present some recent results...

Dec
01
2011

Joint IAS/Princeton University Number Theory Seminar

A Second MainTerm for Counting Cubic Fields, and Biases in Arithmetic Progressions
Takashi Taniguchi
4:30pm|S-101

We prove the existence of second main term of order X^{5/6} for the function counting cubic fields. This confirms a conjecture of Datskovsky-Wright and Roberts. We also prove a variety of generalizations, including to arithmetic progressions, where...