## PROGRAM

## Saturday October 13, 2001.

8:30 - 8:50 Sergey Yuzvinsky, University of Oregon, Eugene, OR. Combinatorics of complex line arrangements with essential jumping loci. 9:00 - 9:20 Alexander I. Suciu, Northeastern University, Boston, MA. Lower central series and free resolutions of arrangements. 9:30 - 9:50 Hiroaki Terao, Tokyo Metropolitan University, Tokyo, Japan. Algebras generated by reciprocals of linear forms. 10:00 - 10:20 Federico Ardila, M.I.T., Cambridge, MA. Tutte Polynomials of Hyperplane Arrangements. 2:30 - 3:15 Richard P. Stanley, M.I.T., Cambridge, MA.Free probability for combinatorialists. 4:00 - 4:20 Louis J. Billera, Cornell University, Ithaca, NY. Quasisymmetric functions and Eulerian enumeration. 4:30 - 4:50 Ira M. Gessel, Brandeis University, Waltham, MA. Variations of hyperoctahedral descent algebras. 5:00 - 5:20 Tom Braden, University of Massachusetts, Amherst, MA. Lower bounds for Kazhdan-Lusztig polynomials from patterns. 5:30 -5:50 Francesco Brenti, Universita' di Roma "Tor Vergata", Rome, Italy. P-kernels, IC bases, and Kazhdan-Lusztig polynomials.

## Sunday October 14, 2001.

8:30 - 9:15 Victor S. Reiner, University of Minnesota, Minneapolis, MN.Recent progress in the topology of simplicial complexes. 9:30 - 9:50 Patricia Hersh, University of Michigan, Ann Arbor, MI. Multiplicity of the trivial representation in rank-selected homology of the partition lattice. 10:00 - 10:20 Tamon Stephen, University of Michigan, Ann Arbor, MI. The Distribution of Values in The Quadratic Assignment Problem. 10:30 - 10:50 Kenneth P. Bogart, Dartmouth College, Hanover, NH. A Geometric Classification of Trapezoid Orders. 2:30 - 2:50 Michelle L. Wachs, University of Miami, Miami, FL. A B_n-analogue of the chessboard complex.3:00 - 3:20 John Shareshian, Washington Univeristy, St. Louis, MO. The probabilistic zeta function and coset poset of a finite group. 3:30 - 3:50 Daniel K. Biss, M.I.T., Cambridge, MA. The matroid Grassmannian is homotopy equivalent to the real Grassmannian. 4:00 - 4:20 Alexander Postnikov, M.I.T., Cambridge, MA. Webs in Grassmann Cells. 4:30 - 4:50 Paul E. Gunnells, University of Massachusetts, Amherst, MA. Moduli spaces and the Littlewood-Richardson cone. 5:00 - 5:20 Laura M. Anderson, SUNY, Binghamton, NY. Poset bundles.

All the lectures take place inRoom 105, Clark Hall.

For further information, please contact:

Eva Maria Feichtner

- Department of Mathematics
- ETH Zürich
- 8092 Zürich, Switzerland
- e-mail: feichtne@math.ethz.ch
Dmitry Kozlov

- Department of Mathematics
- University of Bern
- 3012 Bern, Switzerland
- e-mail: kozlov@math.ethz.ch

- On leave from:
- Department of Mathematics
- Royal Institute of Technology
- 10044 Stockholm, Sweden
- e-mail: kozlov@math.kth.se

last updated: October 5, 2001