# Events

## Thursday, August 1, 2019

### Algebraic Graph Theory - Chris Godsil

Thursday, August 1, 2019 — 2:30 PM EDT

Title: Non-Commutative Algebras and Graphs

Speaker: Chris Godsil Affiliation: University of Waterloo Room: MC 5479

Abstract:

I will discuss some of the non-commutative algebras that arise naturally in graph theory.

### Algebraic Combinatorics Seminar - Clair Dai

Thursday, August 1, 2019 — 3:30 PM EDT

Title: Counting subdivergence-free gluing of trees

Speaker: Clair Dai Affiliation: University of Waterloo Room: MC 5417

Abstract:

If we take two rooted trees with the same number of leaves and form a graph by gluing the leaves of one tree to the other, then we say the graph is subdivergence-free if no 2-edge cut have been generated.

### Algebraic Combinatorics Seminar - Lily Wang

Thursday, August 1, 2019 — 3:30 PM EDT

Title: The combinatorics of nearest and furthest values

Speaker: Lily Wang Affiliation: University of Waterloo Room: MC 5417

Abstract:

A classical problem asks us to find, for each element $A[i]$ of an array of integers, the position of the nearest smallest element.

### Algebraic Combinatorics Seminar - Yuval Ohapkin

Thursday, August 1, 2019 — 3:30 PM EDT

Title: Bijections among symmetric tableaux via folding and mixed insertion

Speaker: Yuval Ohapkin Affiliation: University of Waterloo Room: MC 5417

Abstract:

A standard Young tableau with entries $-M < \cdots -1 < 1 < \cdots < M$ can be "folded" by performing certain conversions and rectifications in sequence.

### August 2019

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