The Combinatorics and Number Theory Seminar

FALL 2001

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Organizers: Laura Anderson, Matthias Beck, and Thomas Zaslavsky.

• Wednesday, September 5
  Speaker: Thomas Zaslavsky (Binghamton)
  Title: Weird Stuff About Sperner's Theorem



• Thursday, September 6 (jointly with the Geometry/Topology Seminar)
  Speaker: Laura Anderson (Binghamton)
  Title: Topology of oriented matroids
  Time: 2:50 - 3:50
  Room: LN-2205



• Wednesday, September 12
  Speaker: Matthias Beck (Binghamton)
  Title: A short, generalizable, and q-analogizable proof of Meshalkin's generalization of Sperner's theorem on componentwise antichains



• Wednesday, September 19
  No meeting (school holiday)



• Tuesday, September 25 (jointly with the Geometry/Topology Seminar)
  Speaker: Laura Anderson (Binghamton)
  Title: Prospects in combinatorial differential manifolds and matroid bundles
  Time: 4:30 - 5:30
  Room: LN-2205


• Wednesday, September 26
  No meeting (school holiday)



• Wednesday, October 3
  Speaker: Alina Vdovina (Binghamton)
  Title: Eulerian Paths in Cubic Graphs, and Their Applications



• Wednesday, October 10
  Speaker: Steven Dougherty (University of Scranton)
  Title: A Coding-Theoretic Proof of a Part of the Bruck-Ryser Theorem


• Thursday, October 11 (jointly with the Geometry/Topology Seminar)
  Speaker: Alina Vdovina (Binghamton)
  Title: Combinatorial Structure of Some Hyperbolic Buildings
  Time: 2:50 - 3:50
  Room: LN-2205



• Wednesday, October 17
  Speaker: Steve Tedford (Binghamton)
  Title: Branching Greedoids of Mixed Graphs


• Thursday, October 18: Colloquium
  Speaker: Marvin Knopp (Temple)
  Title: On the Signs of the Coefficients of Modular Forms
  Time: 4:30 - 5:30
  Room: LN-2205
  
  
• Wednesday, October 24
  No seminar today. See colloquium talk tomorrow.


• Thursday, October 25: Colloquium
  Speaker: Carl Pomerance (Univ. of Georgia and Bell Labs)
  Title: Carmichael's Function
  Time: 4:30 - 5:30
  Room: LN-2205
  
  
• Tuesday, October 30 (Note special day and time!)
  Speaker: Frank Sottile (U. Mass. at Amherst)
  Title: The Malvenuto-Reutenauer Hopf Algebra of Permutations
  Time: 4:30-5:30
  Room: LN-2205



• Wednesday, November 7
  No seminar today. See colloquium talk tomorrow.


• Thursday, November 8: Colloquium
  Speaker: Matthias Beck (Binghamton)
  Title: On the Number of ``Magic Squares''
  Time: 4:30 - 5:30
  Room: LN-2205



• Wednesday, November 14
  Speaker: Sue Whitesides (McGill and Cornell Universities)
  Title: Embedding Problems for Paths and Cycles with Direction-Constrained Edges



• Thursday, November 15: Colloquium
  Speaker: Thomas Zaslavsky (Binghamton)
  Title: Secrets of Biased Graphs Revealed!
  Time: 4:30 - 5:30
  Room: LN-2205



• Wednesday, November 28
  Speaker: Elizabeth McMahon (Lafayette College)
  Title: Polynomials on Greedoids and Antimatroids



• Wednesday, December 5
  Speaker: Timothy Y. Chow (Tellabs Research Center)
  Title: The Ring Grooming Problem: Combinatorial Optimization in Modern Telecommunications Networks



• Thursday, December 13: Colloquium
  Speaker: Stan Wagon (Macalester College)
  Title: A Computational View of the Four-Color Theorem: A Resuscitation of a Famous False Proof
  Time: 4:30 - 5:30
  Room: LN-2205
  
• Friday, December 14 (SPECIAL LECTURE! Note special day and time.)
  Speaker: Joseph P.S. Kung (Univ. of North Texas)
  Title: Goncharov Polynomials and Parking Functions
  Time: 4:30 - 5:30
  Room: LN-2205



• Wednesday, December 19
  Speaker: Daniel Slilaty (Wright State Univ.)
  Title: An Algebraic Characterization of Projective Planarity of Graphs