date	speaker	affiliation	title
August 28	Michael Larsen	Indiana University	Mixing times for random walks on symmetric groups
September 11	Patricia Hersh	Indiana University	Coloring complexes and arrangements
September 25	Various	Indiana University	Discussion regarding creation of undergrad combinatorics class
October 2	Sarah Crown	Denison University	The homology of the cyclic coloring complex of simple graphs
October 16	Bridget Tenner	Depaul University	Pattern avoidance, reduced decompositions, and the Bruhat order
October 23	Russell Lyons	Indiana University	Comparing graphs of different sizes
October 30	Russell Lyons	Indiana University	Comparing graphs of different sizes, part II
Friday, November 2, 2:30-3:30pm	Dennis Stanton	University of Minnesota	Another combinatorial (q,t)-calculus
November 6	Russell Lyons	Indiana University	Asymptotic enumeration of spanning trees via traces and random walks
November 13	Richard Ehrenborg	University of Kentucky	Toric arrangements
November 27	Ben Braun	University of Kentucky	h*-vectors of lattice polytopes
Friday December 7 (Combinatorial Colloquium)	Phil Hanlon	University of Michigan	The amazing Eulerian idempotents

date	speaker	affiliation	title
September 12	Patricia Hersh	Indiana University	Stembridge's q=-1 phenomenon via homology concentration
September 27 (distinguished lecture series related to combinatorics)	Avi Wigderson	IAS	The power and weakness of randomness in computation
September 28 (distinguished lecture series related to combinatorics)	Avi Wigderson	IAS	The sum-product theorem and its applications
September 29 (distinguished lecture series related to combinatorics)	Avi Wigderson	IAS	Expander graphs: constructions and applications
October 3	Elizabeth Housworth	Indiana University	A combinatorial problem from phylogenetics
October 13 (colloquium by combinatorialist who works in several fields)	Gil Kalai	Hebrew University and Yale	Harmonic analysis of Boolean functions
October 17	John Stembridge	Michigan	Irreducible circuits and Coxeter arrangements
October 24	Michael Bateman	Indiana University	Kakeya sets in Cantor directions
November 7	Hari Bercovici	Indiana University	Continuous versions of the Littlewood-Richardson rule in analysis
November 14	Mihai Ciucu	Georgia Tech	The emergence of the electrostatic field as a Feynman sum in random tilings with holes
November 16 (combinatorial talk in probability seminar)	Peter Winkler	Dartmouth College	Submodular Percolation
November 17 (colloquium in probability and combinatorics)	Peter Winkler	Dartmouth College	Maximum Overhang
November 28	Mihai Popa	Indiana University	Rooted Trees, Non-commutative Power Series, Hopf Algebras and an Open Problem
December 8 (combinatorial colloquium)	Ezra Miller	University of Minnesota	Combinatorics in convexity, cohomology, and complex analysis

date	speaker	affiliation	title (click for an abstract)
January 10	Nets Katz	Indiana University	The Grone Merris conjecture and a quadratic eigenvalue problem
January 17	Lewis Bowen	Indiana University	Triangulations of products of polygons and the Gromov norm of products of surfaces
January 31	Allan Edmonds	Indiana University	The partition problem for equifacetal simplices
February 14	Jozsef Balogh	University of Illinois, Urbana-Champaign	Hereditary Combinatorial Structures
February 21	Patricia Hersh	Indiana University	Shelling Coxeter-like complexes and sorting on trees
February 28	Will Orrick	Indiana University	The search for maximal determinant {0,1}-matrices
Monday, March 27 (Algebra/Combinatorics Talk)	Ed Swartz	Cornell University	Higher Cohen-Macaulay connectivity
Wednesday, March 29 (Topology/Combinatorics Talk)	Ed Swartz	Cornell University	Face enumeration on manifolds
Friday, April 7, 2:30pm (note special day and time!)	Lauren Williams	UC Berkeley	Shelling totally nonnegative flag varieties
Monday, April 10 (Algebra/Combinatorics Talk)	Jim Haglund	Ohio State University	From diagonal harmonics to Macdonald polynomials
April 25	Margaret Readdy	University of Kentucky	Eulerian binomial and Sheffer posets

date	speaker	affiliation	title (click for an abstract)
September 6	Russell Lyons	Indiana University	Matroids and Probability: I
September 13	Russell Lyons	Indiana University	Matroids and Probability: II
September 27	Valery Lunts	Indiana University	Intersection cohomology, sheaves on posets and Stanley's conjecture
October 18	Mihai Ciucu	Georgia Tech	The field of holes in random tilings
Friday, October 21 (Combinatorial Colloquium)	Vic Reiner	University of Minnesota	The cyclic sieving phenomenon and invariant theory
October 25	Eric Rowell	Indiana University	BMW Algebras
Monday, November 7 (Algebra/Combinatorics Talk)	Patricia Hersh	Indiana University	The Cohen-Macaulay property for rings of invariant polynomials via topological combinatorics
Monday, November 14 (Algebra/Combinatorics Talk)	Patricia Hersh	Indiana University	The Cohen-Macaulay property for rings of invariant polynomials II
November 29	David Fisher	Indiana University	On the geometry of Diestel-Leader graphs
December 5	Jeremy Martin	University of Kansas	Harmonic algebraic curves and noncrossing partitions

date	speaker	affiliation	title (click for an abstract)
Monday, January 31 (Colloquium in topology and combinatorics)	Daniel Biss	University of Chicago	Discrete continuity: oriented matroids in topology
Monday, February 7 (Algebra/Combinatorics Talk)	Patricia Hersh	Indiana University	Combinatorics of Poincare' Series for Monomial Rings
February 8	Nets Katz	Indiana University	The Carbery rectangle problem, the Erdos hypergraph conjecture, and related issues
February 22	Alex Iosevich	University of Missouri	Distance sets, Mattila integral, and X-ray diffraction
March 1	Allan Edmonds	Indiana University	The geometry of an equifacetal simplex
Friday, March 4 (Combinatorial colloquium)	Jeff Kahn	Rutgers	Correlation questions
March 8	Peter Orlik	University of Wisconsin	Arrangements of hyperplanes
March 15	No seminar -- spring break
March 22	John Shareshian	Washington University in St. Louis	Hypergraph matching complexes and Quillen complexes of symmetric groups
Thursday, March 31	Balazs Szegedy	Microsoft Research	Limits of graph sequences
Monday, April 4 (Algebra/Combinatorics Talk)	Sam Hsiao	University of Michigan	Canonical characters on quasisymmetric functions and bivariate Catalan numbers
April 12	Caroline Klivans	University of Chicago	Combinatorial properties of shifted complexes
Friday, April 22 (Combinatorial colloquium)	Jozsef Solymosi	University of British Columbia	Geometric methods in additive combinatorics
April 26	Richard Ehrenborg	University of Kentucky	The Tchebyshev transform