W 
February 07 
Sergey Norin
 Reducibility for the fourcolor theorem and related conjectures


W 
February 14 
Margaret Readdy
 Affine and toric hyperplane arrangements


F 
February 16 
William Martin
 Some new linear inequalities for binary codes from the Terwilliger algebra


W 
February 21 
Yuval Roichman
 The combinatorics of the GarsiaHaiman modules for hook shapes


F 
February 23 
Richard Ehrenborg
 Counting pattern avoiding permutations via integral operators


W 
February 28 
Dave Bayer
 Graph colorings and toric algebra


F 
March 02 
Jeremy Martin
 Is a tree determined by its chromatic symmetric function?


W 
March 07 
Vic Reiner
 A quasisymmetric function for matroids


F 
March 09 
Ji Li
 Cartesian product of graphs and arithmetic product of species


T 
March 13 
Anatoly Vershik
 Positive 2algebras and the problem on dilation of comultiplication


W 
March 14 
Michelle Wachs
 Topology of Rees products of posets and qEulerian polynomials


F 
March 16 
Tom Bohman
 Packing cubes in a torus


W 
March 21 
Adrian Dumitrescu
 Traversing a set of points with a minimum number of turns


W 
April 04 
Matthew Fayers
 Blocks of multipartitions


F 
April 06 
Caroline Klivans
 A simplicial matrix tree theorem


F 
April 13 
Aaron Siegel
 Misere quotients for impartial games


W 
April 18 
Hajime Tanaka
 Subsets with minimal width and dual width in Qpolynomial distanceregular graphs


F 
April 20 
Dawei Chen
 Counting covers of elliptic curves


W 
April 25 
Jim Propp
 A whirling tour of chipfiring and rotorrouting


F 
April 27 
Akalu Tefera
 On applications of WZ


W 
May 02 
Einar Steingrímsson
 Stack sorting, trees and pattern avoidance


F 
May 04 
Jennifer Morse
 Tableaux combinatorics of affine Schubert calculus


F 
May 11 
William Martin
 An introduction to cometric association schemes

