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Friday, June 22, 2018 — 3:30 PM EDT
Title: Two-level polytopes
| Speaker: | Kanstantsin Pashkovich |
| Affiliation: | University of Waterloo |
| Room: | MC 5501 |
Abstract:
This talk is dedicated to two-level polytopes. On one side, two-level polytopes form a well structured family of polytopes.
Thursday, June 28, 2018 — 11:30 AM EDT
Title: A single pass bijection between certain quarter plane lattice walks and certain Motzkin-like paths.
| Speaker: | Nick Olson-Harris |
| Affiliation: | University of Waterloo |
| Room: | MC 6486 |
Abstract: A p-tandem quarter plane walk is a walk starting at the origin and remaining in the first quadrant using the steps (1,-1) and (-n, p-n) for n between 0 and p.
Thursday, June 28, 2018 — 3:30 PM EDT
Title: Stretching drawings of graphs
| Speaker: | Alan Arroyo |
| Affiliation: | University of Waterloo |
| Room: | MC 5479 |
Abstract: Given a drawing D of a graph (where vertices are dots in the plane and edges are arbitrary curves connecting some pairs of dots),
Friday, June 29, 2018 — 3:30 PM EDT
Title: The c2 invariant at p=2 by counting edge bipartitions
| Speaker: | Karen Yeats |
| Affiliation: | University of Waterloo |
| Room: | MC 5501 |
Abstract:
Since no one provided a visitor or volunteered for this week, I will explain how to prove a special case of a conjecture about the c2 invariant.