Organizers: Emanuele Delucchi, and Thomas Zaslavsky.
The usual day, time, and place are:
Tuesdays, 1:15 - 2:15, in
Room LN-2205,
with coffee, tea, and cookies at 3:45 in the Anderson Room, LN-2207.
Some meetings will be at other times, e.g., when joint with other seminars.
This semester we will have several talks on non-crossing partitions. Here is the link to a short bibliography, including papers that will be presented. Here are links to a first list and second list of relevant papers with reviews (there is overlap with the short bibliography).
Tuesday, September 2
Organizational Meeting (all should come)
+ chat with
Speaker: Thomas Zaslavsky (Binghamton)
Title: Fun at Summer Conferences
Time: 1:15 - 2:15
Room: LN-2205
Tuesday, September 9
Speaker: Emanuele Delucchi (Binghamton)
Title: Finite Reflection Groups, Non-Crossing Partitions, and a Theorem of Deligne
Time: 1:15 - 2:15
Room: LN-2205
Tuesday, September 16
Speaker: Thomas Zaslavsky (Binghamton)
Title: Quasigroups via Graphs
Time: 1:15 - 2:15
Room: LN-2205
Tuesday, September 23
Speaker: Ed Swartz (Cornell)
Title: Three Complexes
Time: 1:15 - 2:15
Room: LN-2205
Tuesday, September 30
Holiday; no meeting.
Tuesday, October 7
Speaker: Thomas Zaslavsky (Binghamton)
Title: Tutte Functions of Matroids
Time: 1:15 - 2:15
Room: LN-2205
Tuesday, October 14
Speaker: Garry Bowlin (Binghamton)
Title: Non-Crossing Partitions, I
Time: 1:15 - 2:15
Room: LN-2205
Tuesday, October 21
Speaker: Garry Bowlin (Binghamton)
Title: Non-Crossing Partitions, II
Time: 1:15 - 2:15
Room: LN-2205
Wednesday, October 29 (Special day)
Speaker: Laura Anderson (Binghamton)
Title: Representation of Matroids by Homotopy Spheres
Time: 2:20 - 3:20 (Special time)
Room: LN-2205
Tuesday, November 4
No meeting today – Election day.
Tuesday, November 11
Speaker: Nate Reff (Binghamton)
Title: The Lattice of Non-Crossing Partitions
Time: 1:15 - 2:15
Room: LN-2205
Thursday, November 13 (Colloquium)
Speaker: Joanna Ellis-Monaghan (St. Michael's College)
Title: The Tutte Polynomial and Potts Model in Statistical Mechanics
Time: 4:30 - 5:30
Room: LN-2205
Friday, November 14 (Special day)
Speaker: Joanna Ellis-Monaghan (St. Michael's College)
Title: Multivariable Tutte and Transition Polynomials
Time: 2:20 - 3:20 (Special time)
Room: LN-2205
Tuesday, November 18
Speaker: Jackie Kaminski (Binghamton)
Title: Regular Non-Crossing Partitions
Time: 1:15 - 2:15
Room: LN-2205
Tuesday, November 25 (joint with the Algebra Seminar)
Speaker: Thomas Zaslavsky (Binghamton)
Title: Graphic Matrices Over a Group
Time: 1:15 - 2:15
Room: LN-2205
Tuesday, December 2 (joint with the Algebra Seminar)
Speaker: Simon Joyce (Binghamton)
Title: The Symmetric Group and Non-Crossing Partitions
Time: 1:15 - 2:15
Room: LN-2205
I will define a poset relation on the symmetric group Sn, which gives a natural order-preserving function from Sn to the lattice of partitions. If we restrict our attention to elements in Sn under a particular n-cycle, we have a lattice which is isomorphic to the lattice of non-crossing partitions. If time permits I'll talk about some of the implications. This work is based on a paper by Thomas Brady.
Tuesday, December 9
Speaker: Lucas Rusnak (Binghamton)
Title: A Multidirected Hypergraph Representation of Matrices with 0, 1, −1 Entries, Part I
Time: 1:15 - 2:15
Room: LN-2205
A multi-directed hypergraph is a combinatorial representation of {0, +1, −1}-matrices that extends the concepts of signed graphs to hypergraphic analogs. I will discuss their discovery and development from hypergraphic matrices and the problems in extending the signed-graphic treatment of the classification of column dependencies.
Tuesday, December 16
Speaker: Lucas Rusnak (Binghamton)
Title: A Multidirected Hypergraph Representation of Matrices with 0, 1, −1 Entries, Part II
Time: 2:50 - 3:50 (Special time)
Room: SW-231 (Special room)
A multi-directed hypergraph is a combinatorial representation of {0, +1, −1}-matrices that extends the concepts of signed graphs to hypergraphic analogs. I will discuss their discovery and development from hypergraphic matrices and the problems in extending the signed-graphic treatment of the classification of column dependencies.
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