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Schedule

Combinatorial Aspects of Hyperplane Arrangements November 01, 2004 - November 05, 2004

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Nov 01, 2004
Monday
09:30 AM - 10:30 AM
  Hyperplane Face Semigroups and their Algebras.
Ken Brown (University of Glasgow)
11:00 AM - 12:00 PM
  Are there Q-deformations of Hyperplanes that are Useful for Shuffling?
Persi Diaconis (Stanford University)
Nov 02, 2004
Tuesday
08:10 AM - 09:10 AM
  Introduction to Matroid Polytopes.
Bernd Sturmfels (UC Berkeley Math Faculty)
09:30 AM - 10:30 AM
  Nested Set Complexes in Geometric Combinatorics.
Eva Feichtner (Universität Bremen)
11:00 AM - 12:00 PM
  Combinatorics of DeConcini-Procesi Resolutions ofthe Real Permutation Action.
Dmitry Feichtner-Kozlov
02:00 PM - 03:00 PM
  Combinatorial Stratifications of the Grassmanians: Algebraic Geometry and Combinatorial Fiber Bundles.
Nicoli Mnev
03:30 PM - 04:00 PM
  Bergman Complexes and Coxeter Arrangements.
Federico Ardila (San Francisco State University)
04:15 PM - 04:45 PM
  Cohomology Rings of Complex Projective Arrangements.
Carsten Schultz
Nov 03, 2004
Wednesday
09:30 AM - 10:30 AM
  Reductive Groups Over a Field of X Elements, X an Indeterminate
Michel Broué (Institute Henri Poincare)
11:00 AM - 12:00 PM
  The Flag Variety Structure for Solutions of the Bethe Ansatz Equations.
Alexander Varchenko (University of North Carolina)
12:15 PM - 12:45 PM
  Combinatorics of Rational Functions and PBW Expansions of the Canonical U(n_)-valued Differential Form.
Laura Stevens
Nov 04, 2004
Thursday
09:30 AM - 10:30 AM
  Hyperplane Arrangements and Special Relativity.
Richard Stanley (Massachusetts Institute of Technology)
11:00 AM - 12:00 PM
  Real Rootedness and Unimodality in Discrete Geometry.
Volkmar Welker (Philipps-Universität Marburg)
02:00 PM - 03:00 PM
  Hyperplane Arrangements and Ideals Generated by Powers of Linear Forms.
Alexander Postnikov
03:30 PM - 04:00 PM
  Some Remarks on Modular Elements in Lattices.
Patricia Hersh
04:15 PM - 05:15 PM
  Reflection Groups and Modular Invariants Theory.
Anne Shepler
Nov 05, 2004
Friday
09:30 AM - 10:30 AM
  Catalan and Narayana Numbers for Weyl Groups.
Christos Athanasiadis
02:00 PM - 03:00 PM
  On the Multi-Free Arrangements.
Hiroaki Terao (Hokkaido University)
02:00 PM - 03:00 PM
  A Look at Right-Angled Artin Groups.
Alexandru Suciu (Northeastern University)