Discrete Geometry and Combinatorics Seminar 2009-10

List of Talks given in 2009-10

Monday, August 31   Caroline Klivans, University of Chicago
A geometric interpretation of the characteristic polynomial of reflection arrangements
Monday, September 7   Robert Connelly, Cornell University
Global rigidity
Monday, September 14   Nikolai Dolbilin, Steklov Mathematical Institute
Parallelohedra: classical and new results, the Voronoi problem
Monday, September 21   Marcelo Aguiar, Texas A&M University
The Hopf monoid of generalized permutahedra
Monday, October 26   Aaron Lauve, Texas A&M University
Skew Littlewood-Richardson rules from Hopf algebras
Monday, November 2   Eran Nevo, Cornell University
Upper bounds on face numbers of flag spheres
Monday, November 9   Russ Woodroofe, Washington University
Chordal clutters and k-decomposability
Monday, November 16   Justin Lambright, Lehigh University
A combinatorial interpretation for computations in the quantum polynomial ring
Monday, November 23   Andy Frohmader, Cornell University
Flag f-vectors of colored complexes
Monday, November 30   Sam Hsiao, Bard College and Cornell University
Peaks, shuffles, and multigraded Hopf algebras
Monday, January 25   Edward Swartz, Cornell University
Angle sums revisited
Monday, February 15   Igors Gorbovickis, Cornell University
Kneser-Poulsen conjecture for low density configurations
Monday, February 22   Emanuele Delucchi, Binghamton University
Complex matroids
Monday, March 1   David Speyer, MIT
Alternating strand diagrams and weakly separated sets
Monday, March 8   Matthew Dyer, Notre Dame University
Bruhat intervals and polyhedral cones
Monday, March 15   Felix Effenberger, University of Stuttgart
Large combinatorial conditions for the tightness of triangulated manifolds
Tuesday, March 30   Dustin Cartwright, University of California at Berkeley
Three notions of tropical rank for symmetric matrices
Monday, April 5   Yoav Kallus, Cornell University
Tetrahedron packing
Monday, April 19   Marcelo Aguiar, Texas A&M University and Cornell University
Coxeter Hopf monoids
Monday, April 26   James Worthington, Cornell University
Bialgebras and automata
Monday, May 3   Caroline Klivans, University of Chicago and Cornell University
Oriented matroids and the geometry of visibility
Monday, May 10   Elizabeth Beazley, University of Michigan
Maximal Newton polygons associated to affine Weyl group elements