Indiana University Combinatorics Seminar Schedule
Winter 2008: Tuesdays 4-5pm, 104 Rawles Hall

Egregiously stealing the motto of the University of Minnesota Combinatorics Seminar: Welcome to the web page of the Indiana University Combinatorics Seminar, ``Where people count!''

date speaker affiliation title
January 9 (topology seminar talk involving combinatorics)
Patricia Hersh Indiana University Regular cell complexes modeling Bruhat intervals
January 21
Will Orrick Indiana University Codes and the structure of Hadamard matrices
February 26
Hari Bercovici Indiana University Schubert calculus for the practical person
March 6
Hari Bercovici Indiana University More Schubert calculus for the practical person
March 25
Nets Katz Indiana University Sum product theorems in various contexts
April 1
Mihai Popa Indiana University Some combinatorics of non-commutative types of independence
April 5-6
Billera, Brenti, Fomin, Mitchell, Postnikov, and assorted short talks assorted universities AMS special session in Bloomington
April 8
Michelle Wachs University of Miami Eulerian quasisymmetric functions and poset topology
April 14 (basic notions seminar talk of a combinatorial flavor)
Patricia Hersh Indiana University Schubert polynomials
April 16 (topology/combinatorics)
Jamie Pommersheim Reed College and UCSD The geometry of summation
April 22
Jim Davis Indiana University Mod 2 cohomology of combinatorial Grassmannians

Indiana University Combinatorics Seminar Schedule
Fall 2007: Tuesdays 4-5pm, 104 Rawles Hall

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

Indiana University Combinatorics Seminar Schedule
Fall 2006: Tuesdays 4-5pm, 104 Rawles Hall

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

Indiana University Combinatorics Seminar Schedule
Winter 2006: Tuesdays 4-5pm, 104 Rawles Hall

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

Indiana University Combinatorics Seminar Schedule
Fall 2005: Tuesdays 4-5pm, 104 Rawles Hall

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

Indiana University Combinatorics Seminar Schedule
Winter 2005: Tuesdays 4-5pm, 104 Rawles Hall

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