** Program for the 2015 MCC, Vincent Hall 16**

** Tuesday May 19, 2015**

8:55-9:00 Introductory Remarks

9:00-10:00 **Sergey Fomin**, University of Michigan, Webs, invariants, and clusters

10:00-10:30 Break

10:30-11:00 **Alex Yong**, University of Illinois at Urbana-Champaign, Combinatorics and geometry of
symmetric orbit closures

11:10-11:40 **Bridget Tenner**, DePaul University, Enumeration problems about reduced words

11:50-12:20 **Jeremy Martin**, University of Kansas, A non-partitionable Cohen-Macaulay simplicial complex

12:30-2:00 Lunch

2:00-3:00** Steven Sam**, University of California, Berkeley/University of Wisconsin, Madison, Schur-Weyl duality and
generalizations

3:00-3:30 Break

3:30-4:00** Matthew Dyer**, University of Notre Dame, Poincaré series of Coxeter groups and multichains in
Eulerian posets

4:10-4:40** Aaron Lauve**, Loyola University, The characteristic polynomial of the antipode for combinatorial
Hopf algebras

4:50-5:20** Bruce Sagan**, Michigan State University, Of antipodes and involutions

** Wednesday May 20, 2015**

9:00-10:00 **Sergey Fomin**, University of Michigan, Computing without subtracting (and/or dividing)

10:00-10:30 Break

10:30-11:00** John Shareshian**, Washington University in St. Louis, Subrack lattices of group racks

11:10-11:40** Ben Braun**, University of Kentucky, Geometric properties of r-stable hypersimplices

11:50-12:20** Martha Yip**, University of Kentucky, A categorification of the chromatic symmetric function

Lunch 12:30-2:00

2:00-3:00 **Ben Brubaker**, University of Minnesota, Combinatorial Solutions to Automorphic Problems

3:00-3:30 Break

3:30-4:00** Anna Stokke**, University of Winnipeg, Increasing tableaux and the cyclic sieving phenomenon

4:10-4:40** Fabrizio Zanello**, Michigan Technological University, Partitions with distinct parts and
unimodality

4:50-5:20** Kyle Petersen**, DePaul University, Surrounding Gessel's conjecture

** Thursday, May 21, 2015**

9:00-10:00 ** Steven Sam**, University of California, Berkeley/University of Wisconsin, Madison, Schur-Weyl duality and
generalizations

10:00-10:30 Break

10:30-11:00** Richard Ehrenborg**, University of Kentucky, The descent set polynomial revisited

11:10-11:40** Ryan Kinser**, University of Iowa, New inequalities for subspace arrangements

11:50-12:20** Eric Egge**, Carleton College, Snow Leopard Permutations, Even Knots, Odd Knots, Janus
Knots, and Restricted Catalan Paths

12:30-2:00 Lunch

2:00-3:00** Ben Brubaker**, University of Minnesota, Combinatorial Solutions to Automorphic Problems