The Combinatorics Seminar

SPRING–SUMMER 2016

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Directions to the department.

Organizers: Michael Dobbins, Vaidy Sivaraman, and Thomas Zaslavsky.

SPRING 2016

• Tuesday, January 26
  Brief organizational meeting. Then:
  Speaker: Vaidy Sivaraman (Binghamton)
  Title: JMM 2016
  Time: 1:15 - 2:15
  Room: WH-100E
• Tuesday, February 2
  Speaker: Vaidy Sivaraman (Binghamton)
  Title: Mock Threshold Graphs
  Time: 1:15 - 2:15
  Room: WH-100E
• Tuesday, February 9
  Today's meeting time will be given over to private meditation—perhaps personal improvement or paper grading.
• Tuesday, February 16
  Speaker: Michael Dobbins (Binghamton)
  Title: Shadows of a Closed Curve
  Time: 1:15 - 2:15
  Room: WH-100E
• Tuesday, February 23
  Postponed to March 1.
• Tuesday, March 1
  Speaker: Thomas Zaslavsky (Binghamton)
  Title: Mock Threshold Graphs: Planarity
  Time: 1:15 - 2:15
  Room: WH-100E
• Tuesday, March 8
  No meeting today
• Tuesday, March 15
  Speaker: Elizabeth Munch (Albany)
  Title: The Reeb Graph Interleaving Distance and its Application to Data Analysis
  Time: 1:15 - 2:15
  Room: WH-100E
• Tuesday, March 22
  Speaker: Richard Behr (Binghamton)
  Title: Signed Graph Coloring
  Time: 1:15 - 2:15 and 4:30 - 5:30
  Room: WH-100E
• Tuesday, April 5
  Speaker: Michael Dobbins (Binghamton)
  Title: The Number of Holes in the Union of Translates of a Convex Set in Three Dimensions
  Time: 1:15 - 2:15
  Room: WH-100E
• Tuesday, April 12
  Speaker: Amelia Mattern (Binghamton)
  Title: Bounds for the Number of Triangles in Arrangements of Lines and Pseudolines in the Real Projective Plane
  Time: 1:15 - 2:15
  Room: WH-100E
• Tuesday, April 19
  Speaker: Ting Su (Binghamton)
  Title: Matroids Over Hyperfields, I
  Time: 1:15 - 2:15
  Room: WH-100E

  I'll present an algebraic framework which simultaneously generalizes the notions of linear subspaces, matroids, oriented matroids, and phased matroids. The resulting objects are called "matroids over hyperfields". This is from a new paper by Matthew Baker, "Matroids over hyperfields".

• Tuesday, April 26
  Speaker: Ting Su (Binghamton)
  Title: Matroids Over Hyperfields, II
  Time: 1:15 - 2:15
  Room: WH-100E
• Saturday, April 30
  DISCRETE MATHEMATICS DAY at Smith College
  Highly recommended to all with an interest in combinatorics, broadly interpreted. Maybe several of us will go. Registration is requested, only to get an estimate of the attendance.
• Tuesday, May 3
  Speaker: Ting Su (Binghamton)
  Title: Matroids Over Hyperfields, III
  Time: 1:15 - 2:15
  Room: WH-100E
• Tuesday, May 10
  A day of rest (no seminar).
• Monday, May 16 (Note special day)
  Speaker: Russ Woodroofe (Mississippi State)
  Title: A Broad Class of Shellable Lattices
  Time: 1:00 (Note special time)
  Room: WH-100E

SUMMER 2016

Anticipated Future Talks

• Speaker: Jim Lawrence (George Mason)