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Thursday, March 31, 2016 — 4:00 PM EDT
Title: Presenting a tangle
Thursday, March 31, 2016 — 3:00 PM EDT
Title: Arc-transtive cubic graphs
| Speaker: | Krystal Guo |
| Affiliation: | University of Waterloo |
| Room: | MC 6486 |
Abstract: We will look at a classical result of Tutte in his seminal paper "A Family of Cubic Graphs"; every cubic arc-transitive graph is s-arc-regular for some s between 1 and 5.
Thursday, March 31, 2016 — 3:00 PM EDT
Title: Arc-transtive cubic graphs
| Speaker: | Krystal Guo |
| Affiliation: | University of Waterloo |
| Room: | MC 6486 |
Abstract: We will look at a classical result of Tutte in his seminal paper "A Family of Cubic Graphs"; every cubic arc-transitive graph is s-arc-regular for some s between 1 and 5.
Thursday, March 24, 2016 — 2:00 PM EDT
Title: Representation stability for the cohomology of arrangements
Tuesday, March 22, 2016 — 4:15 PM EDT
Title: Gallai's path decomposition conjecture
Monday, March 21, 2016 — 4:30 PM EDT
Title: The mathematics of juggling
| Speaker: | Gabriel Gauthier-Shalom |
| Affiliation: | University of Waterloo |
| Room: | MC 6486 |
Abstract: Siteswap is a mathematical notation for juggling patterns that is
natural, simple, and useful in practice. I will be presenting an overview of
this topic and its connections with other areas of mathematics. There will be demonstrations!
Friday, March 18, 2016 — 3:30 PM EDT
Title: Recognizing frame matroids
Thursday, March 17, 2016 — 4:00 PM EDT
Title: The matroid secretary problem for minor-closed classes
Thursday, March 17, 2016 — 2:00 PM EDT
Title: McMullen's proof of the g-theorem for polytonal spheres
Monday, March 14, 2016 — 4:30 PM EDT
Title: Principal angles and vectors of two subspaces
Friday, March 11, 2016 — 3:30 PM EST
Title: Graphs are to matroids as embedded graphs are to what?
Thursday, March 10, 2016 — 4:30 PM EST
Title: The replication conjecture II
Thursday, March 10, 2016 — 3:00 PM EST
Title: Strongly regular subconstituents of strongly regular graphs
Thursday, March 10, 2016 — 2:00 PM EST
Title: Hopf algebras, colorings and simplicial complexes
Monday, March 7, 2016 — 4:30 PM EST
Title: The perfect matching polytope and solid graphs
Friday, March 4, 2016 — 3:30 PM EST
Title: On some polytopes contained in the 0,1 hypercube that have a small
chvatal rank
Thursday, March 3, 2016 — 4:00 PM EST
Title: A unified Erd\H os-P\'osa theorem for constrained cycles
Thursday, March 3, 2016 — 3:00 PM EST
Title: Introduction to association schemes
| Speaker: | Krystal Guo |
| Affiliation: | University of Waterloo |
| Room: | MC 6486 |
Abstract: The theory of association schemes is an important toolbox for algebraic graph theory. We will give an introduction to association scheme, distance regular graphs and the clique-coclique bound.
Friday, February 26, 2016 — 3:30 PM EST
Title: My favorite number
| Speaker: | John Baez |
| Affiliation: | University of California, Riverside |
| Room: | DC 1302 |
Abstract: The number 24 plays a central role in mathematics thanks to a series of "coincidences" that is just beginning to be understood. One of the first hints of this fact was Euler's bizarre "proof" that
1\^ + 2\^ + 3\^ + 4\^ + … = -1/12\^
Thursday, February 25, 2016 — 4:30 PM EST
Title: The Replication Conjecture
| Speaker: | Ahmad Abdi |
| Affiliation: | University of Waterloo |
| Room: | MC 5417 |
Abstract: In 1972, Lovasz proved a key lemma that was the piece of the puzzle Fulkerson missed to prove the weak perfect graph theorem. This important lemma, called the Duplication Lemma, simply states that vertex duplication preserves graph perfection.
Thursday, February 18, 2016 — 4:00 PM EST
Title: Matroid perspectives and graph polynomials
Thursday, February 11, 2016 — 4:30 PM EST
Title: Claw decompositions of random 4-regular graphs
Thursday, February 11, 2016 — 3:30 PM EST
Title: Quantum walks and graph embeddings
Wednesday, February 10, 2016 — 9:00 AM EST
Title: Trees, chord diagrams and the renormalization group equation
| Speaker: | Karen Yeats |
| Affiliation: | Simon Fraser University |
| Room: | MC 5417 |
Abstract: How far can we get in understanding perturbative expansions in quantum field theory combinatorially?