The colloquium meets Thursdays at 4:10 pm to 5:00 pm in 60 Evans Hall. We will have at least two talks every month. Lectures last 50 minutes and are followed by a short question period. The mathematical public is cordially invited to attend.
Kenneth Ribet, Colloquium Chair
Fall 2017
Date 
Speaker 
Title 
Aug 24 
Günter M. Ziegler, Freie Universität Berlin 
Semialgebraic sets of integer points 
Aug 31 
John Rhodes, UC Berkeley 
Boolean representations of simplicial complexes: beyond matroids 
Sep 7 

State of the Department Address 
Sep 14 
Kevin Costello, Perimeter Institute 
What is the AdS/CFT correspondence? 
Sep 21 
Alex Wright, Stanford 
Geometry, dynamics, and the moduli space of Riemann surfaces 
Sep 28 
Bernd Sturmfels, UC Berkeley 
Tensors and their Eigenvectors 
Oct 5 
Caroline Klivans, Brown University 
The Partitionability Conjecture 
Oct 12 
Jesus De Loera, UC Davis 
The first hundred years of Helly’s theorem 
Oct 19 
Nima ArkaniHamed, IAS 
The Positive Geometry of Fundamental Physics, From Scattering
Amplitudes to the Wavefunction of the Universe 
Oct 26 
Alexander Postnikov, MIT 
Chip firing, root systems, permutohedra, and Coxeter arrangements 
Nov 2 
Keith Devlin, Stanford 
When the precision of mathematics meets the messiness of the world of people (Serge Lang Lecture) 
Nov 9 
Tomoko Kitagawa, UC Berkeley
Center for Science, Technology, Medicine and Society

The Global Histories of Mathematics 
Nov 16 
Semyon Dyatlov, MIT/UC Berkeley 
What is quantum chaos? 
Nov 23 
 
Thanksgiving 
Nov 30 
Federico Ardila, San Francisco State
University 
Algebraic Structures on Polytopes 