CURRENT SEMINAR:
Thursday, April 12, 2007
NEW SEMINAR TIME: 12 NOON upcoming seminars: Thursday, April 19, 2007
Thursday, April 26, 2007

Thursday, March 9, 2006
Yi Zhao (Georgia State)
Title: Traces of finite sets
Thursday, March 30, 2006
Leonid Gurvits (Los Alamos National Laboratory)
Title: Hyperbolic polynomials and Van der Waerden / SchrijverValiant like conjectures
Thursday, February 23, 2006
Peter Keevash (Caltech)
Title: Algebraic techniques for Turán problems
Thursday, February 16, 2006
Cheng Yeaw Ku (Caltech)
Thursday, January 26, 2006
Eric Sundberg (Whittier College)
Title: An Introduction to Positional Game Theory
Thursday, January 19, 2006
Bahattin Yildiz (Caltech)
Title: Homogeneous Weights modulo prime powers of Linear Codes over Galois Rings
Thursday, January 12, 2006
PoShen Loh (Princeton)
Title: Independent transversals in locally sparse graphs
Thursday, December 8, 2005
Richard Anstee (UBC)
TITLE: Forbidden Configurations: An update
See ABSTRACT
Tuesday, December 6, 2005
Pawel Wocjan (Caltech)
TITLE: Mutually Unbiased Bases and Semiregular Relative Difference Sets
in Abelian Groups
Thursday, December 1, 2005
Xiaoyu Liu (Caltech)
Divisible code bound
Thursday, November 10, 2005
Steven Butler (UCSD)
On permutations which avoid the patterns 1324 and 2143
Thursday, November 9, 2005
Steven Butler (UCSD)
"On permutations which avoid the patterns 1324 and 2143"
See Abstract
Thursday, October 27, 2005
Peter Keevash (Caltech)
"Report on a recent combinatorial meeting"
Cheng Ku (Caltech)
Lecture Two
Thursday, October 13, 2005
Cheng Ku (Caltech)
Lecture One
Thursday, September 29, 2005
Richard Wilson (Caltech)
"An AxKatztype theorem for systems of congruences"
Thursday, June 9, 2005
Dan Pragel (Caltech)
Central Digraphs, Central Groupoids and ZeroOne Matrices A such
that A^2 = J.
See Abstract
Thursday, June 2, 2005
Peter Keevash (Caltech)
Pairwise intersections and forbidden configurations
See Abstract
May 26, 2005
Yuval Roichman ((BarIlan)
Statistics on permutation groups, canonical words and pattern
avoidance
See Abstract
Thursday, May 19, 2005
Paul ZinnJustin (ParisSud)
Towards a proof of the RazumovStroganov conjecture?
See Abstract
Thursday, May 12, 2005
Terence Tao (UCLA)
The determinant and singularity probability of a random ± 1 matrix
See Abstract
Thursday, May 5, 2005
Allen Knutson (UC Berkely)
The glue between Young tableaux
See Abstract
Thursday, April 21, 2005
Richard Wilson (Caltech)
Revisiting the (t, k)subset inclusion matrices
See Abstract
Thursday, April 14
Benny Sudakov (Princeton University)
Max Cut  combinatorial perspective
See Abstract
THURSDAY, March 3, 2005
Dhruv Mubayi (University of Illinois)
New developments on RamseyTuran theory for hypergraphs
See
Abstract
THURSDAY, FEBRUARY 17, 2005
Peter Dukes (University of Victoria)
The cycle structure of uniform onefactorizations from starters in finite
fields
See see details of his visit
THURSDAY, FEBRUARY 10, 2005
Carlos SalazarLazaro (Caltech)
Progress on the existence problem of Skew Hadamard
Difference Sets
See Abstract
THURSDAY, JANUARY 20, 2005
Pawel Wocjan (Calech)
Limitations of nice mutually unbiased bases
See Abstract
THURSDAY, NOVEMBER 17, 2004
Pawel Wocjan (Calech)
Eulerian orthogonal arrays
See Abstract
November 10
Noam Berger (Caltech)
Mixing time for the biased card shuffling and the asymmetric exclusion process
October 28
Peter Keevash (Caltech)
Multicoloured extremal problems
See Abstract
October 21
Pawel Wocjan, Caltech
New construction of mutually unbiased bases in square dimensions
See Abstract
October 14
Richard Wilson (Caltech)
Incidence matrices and a zerosum Ramseytype problem
October 7
Peter Keevash (Caltech)
The role of approximate structure in extremal combinatorics
See Abstract
September 30
Daniel J. Katz (Caltech)
A theorem of N. Katz from a generalization McEliece’s Theorem
see photo
April 15
Rick Wilson (Caltech)
Decompositions of edgecolored complete graphs
March 18
Heeralal Janwa
(University of Puerto Rico)
New Explicit Families of Constant Degree Expander Graphs: Their
Tanner Codes and Decoding
March 11
Yukiyasu Mutoh (Keio University, Yokohama, Japan)
Decompositions of a
complete graph into colorwise simple graphs.
March 4
Sergey Kitaev (U. of Kentucky)
Numerical characteristics of unavoidable sets
February 26
Richard Wilson (Caltech)
ReedMuller codes and the AxKatz theorem
Rick Wilson has hosted the combinatorics seminar at Caltech for 23 years.
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Recent visitor was Qing Xiang from the University of Delaware.
Qing presented his first lecture Thursday, January 15, 2004
The invariant factors of the incidence matrices of points and subspaces in
PG(n,q) and AG(n,q)
See some of Qing's notes on this lecture
His second lecture was presented Thursday, January 29, 2004
On Mathon's construction of maximal arcs in Desarguesian planes
See some of Qing's notes at this lecture
Click below for a sampling of seminar speakers and their visits: