The Combinatorics and Number Theory Seminar
Current Semester and Home Page
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: LN2205

Wednesday, September 12
Speaker: Matthias Beck (Binghamton)
Title: A short, generalizable, and qanalogizable 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: LN2205

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 CodingTheoretic Proof of a Part of the BruckRyser 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: LN2205

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: LN2205

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: LN2205

Tuesday, October 30 (Note special day and time!)
Speaker: Frank Sottile (U. Mass. at Amherst)
Title: The MalvenutoReutenauer Hopf Algebra of Permutations
Time: 4:305:30
Room: LN2205

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: LN2205

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

Thursday, November 15: Colloquium
Speaker: Thomas Zaslavsky (Binghamton)
Title: Secrets of Biased Graphs Revealed!
Time: 4:30  5:30
Room: LN2205

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 FourColor Theorem: A Resuscitation of a Famous False Proof
Time: 4:30  5:30
Room: LN2205

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: LN2205

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