Events - June 2015

Monday, June 29, 2015 — 1:30 PM EDT

Ehsaan Hossain, Department of Pure Mathematics, University of Waterloo

“ELI5: Leavitt Path Algebras”

Abstract

Friday, June 26, 2015 — 12:30 PM EDT

Adam Dor On, Department of Pure Mathematics, University of Waterloo

“K-theory of graph C*-algebras : Strategy and computation”

Friday, June 26, 2015 — 11:23 AM EDT

Mohamed El Alami, Pure Math Department, University of Waterloo

“Inoue Surfaces”

Thursday, June 25, 2015 — 4:00 PM EDT

James Haley, Department of Pure Mathematics, University of Waterloo

“Preserving Reality”

Thursday, June 25, 2015 — 2:00 PM EDT

David Belanger, Cornell University


Π1 conservation theorems and RCA0

Wednesday, June 24, 2015 — 2:30 PM EDT

Savio Ribas, Pure Math Department, University of Waterloo

“EGZ constant and its (many!) generalizations”

Wednesday, June 24, 2015 — 1:30 PM EDT

Adam Dor On, Department of Pure Mathematics, University of Waterloo

“K-theory of graph C*-algebras : Crossed product preliminaries”

In this talk we will give a rather quick introduction to crossed product C* algebras. We will mainly focus on the case of abelian groups and look at some examples

MC 5417

Monday, June 22, 2015 — 1:30 PM EDT

Ian Payne, Department of Pure Mathematics, University of Waterloo

“What do Universal Algebraists do?”

Thursday, June 18, 2015 — 2:00 PM EDT

Michael Deveau, Department of Pure Mathematics, University of Waterloo

“Pseudo-Jump Inversion - Part II”

Wednesday, June 17, 2015 — 2:30 PM EDT

Theodore Hui, Cornell University

“Class Field Theory and its Applications”

Class Field Theory is just like Galois Theory or the Fundamental Theorem of Algebra in the sense that the statements are useful and powerful in their own rights - you don’t really need to worry too much about their proofs before knowing how to apply them.

Tuesday, June 16, 2015 — 1:30 PM EDT

Spiro Karigiannis, Pure Mathematics Department, University of Waterloo

“Differential Analysis IV: Thom-Smale Transversality”

Monday, June 15, 2015 — 1:30 PM EDT

John Campbell, Department of Pure Mathematics, University of Waterloo

“The Immaculate Basis and the Shin Basis of NSym”

Friday, June 12, 2015 — 12:30 PM EDT

Adam Dor On, Department of Pure Mathematics, University of Waterloo

“K-theory for graph C*-algebras”

After we’ve dealt with some K-theory, we introduce another six-term exact sequence due to Pimsner and Voiculescu in the context of graph algebras. We use our combined knowledge on K-theory and graph algebras to start computing the K-theory of a graph C*-algebra.

MC 5417

Thursday, June 11, 2015 — 2:00 PM EDT

Michael Deveau, Department of Pure Mathematics, University of Waterloo

“Pseudo-Jump Inversion and C.E. Operators”

Wednesday, June 10, 2015 — 1:30 PM EDT

Anton Borissov, Pure Math Department, University of Waterloo

“Divisors on Toric Varieties II”

After briefly reviewing what we did in the first talk, we will move on to discuss the orbit- cone correspondence, Weil divisors, and Cartier divisors on toric varieties. Time permitting we shall talk about how to compute the divisor class group and the Picard group on a toric variety.

M3 2134

Wednesday, June 10, 2015 — 1:30 PM EDT

Ehsaan Hossain, Department of Pure Mathematics, University of Waterloo

“Purely infinite graph C*-algebras, continued”

Tuesday, June 9, 2015 — 4:30 PM EDT

Zack Cramer, Pure Mathematics Department, University of Waterloo

"The Matrix-Tree Theorem"

Monday, June 8, 2015 — 1:30 PM EDT

Blake Madill, Department of Pure Mathematics, University of Waterloo

“GK Dimension and the Bergman Gap Theorem”

Friday, June 5, 2015 — 4:00 PM EDT

Laurent Marcoux, David McKinnon, Nico Spronk, Ross Willard, Frank Zorzitto

Department of Pure Mathematics, University of Waterloo

“Some Highly Influential and Extremely Important Short Presentations.”

5 accomplished speakers. 5 minutes each. 1 hilarious afternoon.

Friday, June 5, 2015 — 12:30 PM EDT

Ehsaan Hossain, Department of Pure Mathematics, University of Waterloo

“Purely infinite graph C*-algebras”

Back on the graph algebras track, we will describe necessary and sufficient graph-theoretic conditions for a graph algebra to be AF or purely infinite simple. It will follow that these two classes cover all the simple graph algebras.

MC 5417

Thursday, June 4, 2015 — 2:00 PM EDT

Russell Miller, Queens College - City University of New York

"Effective Classification of Computable Structures”

Wednesday, June 3, 2015 — 2:30 PM EDT

John C. Saunders, Department of Pure Math, University of Waterloo

“The Turan Sieve”

Abstract

Wednesday, June 3, 2015 — 1:30 PM EDT

Anton Borissov, Pure Math Department, University of Waterloo

“Divisors on Toric Varieties”

Toric Varieties are geometric objects that are described by combinatorial data. Their description allows one to compute many geometrical quantities in a straightforward fashion. In this talk we will define toric varieties and work towards describing the global sections of line bundles on them.

Wednesday, June 3, 2015 — 1:30 PM EDT

Adam Dor On, Department of Pure Mathematics, University of Waterloo

K1 of a C*-algebra, continued”

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