## Contact Info

Pure MathematicsUniversity of Waterloo

200 University Avenue West

Waterloo, Ontario, Canada

N2L 3G1

Departmental office: MC 5304

Phone: 519 888 4567 x43484

Fax: 519 725 0160

Email: puremath@uwaterloo.ca

**Returning to in-person experiences in February:** Visit the COVID-19 website for more information.

Friday, March 20, 2015 — 3:30 PM EDT

**Safoura Jafar-Zadeh, University of Manitoba **

“Isometric Isomorphisms of Beurling Algebras Associated with Locally Compact Groups”

Friday, March 20, 2015 — 3:30 PM EDT

** Alberto García-Raboso, University of Toronto**

"A twisted nonabelian Hodge correspondence"

The classical nonabelian Hodge correspondence establishes an equivalence between certain categories of flat bundles and Higgs bundles on smooth projective varieties. I will describe an extension of this result to twisted vector bundles. No prior knowledge of the above topics will be assumed: come one, come all! There will be pancakes too.

Friday, March 20, 2015 — 2:30 PM EDT

**Thomas Walpuski, MIT - Massachusetts Institute of Technology **

“G2instantons over twisted connected sums”

Friday, March 20, 2015 — 1:00 PM EDT

**Rahim Moosa, Department of Pure Mathematics, University of Waterloo **

“Approximate Groups: VIII”

We continue to follow van den Dries Seminaire Bourbaki article entitled Approximate Groups [after Hrushovski, and Breuillard, Green, Tao]. The subject involves the interaction of additive combinatorics and model theory.

MC 5413

Wednesday, March 18, 2015 — 2:30 PM EDT

**Jason Bell, Department of Pure Mathematics, University of Waterloo **

“What is a noncommutative torus, II”

Tuesday, March 17, 2015 — 3:30 PM EDT

**Michael Deveau, Department of Pure Mathematics, University of Waterloo **

“(Weak) Konig’s Lemma over RCA0.”

Tuesday, March 17, 2015 — 2:30 PM EDT

**Alexander Wires, Department of Pure Mathematics, University of Waterloo **

“Cubing Finite Taylor Algebras”

I will provide the details showing how finite idempotent Taylor algebras can be character- ized by the hereditary existence of cubed elements. There is a corresponding notion of cube absorption which can be described as Few Subpowers and Absorption Theory in a blender. If there is time, I would like to pose a problem here.

Monday, March 16, 2015 — 1:30 PM EDT

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

''Uniqueness theorems for graph algebras and applications”

This week we will discuss uniqueness of graph algebras up to the existence of a gauge circle action. We will then use this to prove that for graphs with no sources, the graph algebra of the graph is *-isomorphic to the graph algebra of the dual of that graph.

M3-2134

Friday, March 13, 2015 — 3:30 PM EDT

**Alessandro Vignati, York University **

“Amenable Operator Algebras and the Isomorphisms problem”

Friday, March 13, 2015 — 2:30 PM EDT

**Long Li, McMaster University **

“On the convexity of the Mabuchi energy functional along geodesics”

Friday, March 13, 2015 — 1:00 PM EDT

**Rahim Moosa, Department of Pure Mathematics, University of Waterloo **

“Approximate Groups: VII”

We continue to follow van den Dries Seminaire Bourbaki article entitled Approximate Groups [after Hrushovski, and Breuillard, Green, Tao]. The subject involves the interaction of additive combinatorics and model theory.

MC 5413

Wednesday, March 11, 2015 — 2:30 PM EDT

**Jason Bell, Department of Pure Mathematics, University of Waterloo **

“What is a noncommutative torus?”

Tuesday, March 10, 2015 — 3:30 PM EDT

**Mohammad Mahmoud, Department of Pure Mathematics, University of Waterloo **

“Introduction to Reverse Mathematics (continued)”

We finish characterizing the ω−modelsofRCA0. If time helps, we continue doing the same for ACA0. If time permits, Michael Deveau will do the same for ACA_0.

MC 5413

Tuesday, March 10, 2015 — 2:30 PM EDT

**Renzhi Song, Department of Pure Mathematics, University of Waterloo **

“Barto’s NU Theorem (continued)”

Monday, March 9, 2015 — 4:00 PM EDT

**Hubert Bray, Duke University **

“The Geometry of the Universe”

Monday, March 9, 2015 — 1:30 PM EDT

**Ehsaan Hossain, Department of Pure Mathematics, University of Waterloo **

“Semisimple algebras and acyclic graphs”

Friday, March 6, 2015 — 3:30 PM EST

**Nicholas Lai, University of Waterloo **

“Linear Algebraic Groups, Part I”

Monday, February 23, 2015 — 4:00 PM EST

**Ailana Fraser, University of British Columbia**

"Minimal surfaces and eigenvalue problems"

Monday, February 9, 2015 — 4:00 PM EST

**David Riley, Western University**

"Hopf algebra actions, gradings, and identical relations"

Monday, January 26, 2015 — 4:00 PM EST

Friday, January 23, 2015 — 4:00 PM EST

Friday, January 23, 2015 — 2:30 PM EST

Friday, January 23, 2015 — 1:00 PM EST

Wednesday, January 21, 2015 — 2:30 PM EST

Monday, January 19, 2015 — 4:00 PM EST

University of Waterloo

200 University Avenue West

Waterloo, Ontario, Canada

N2L 3G1

Departmental office: MC 5304

Phone: 519 888 4567 x43484

Fax: 519 725 0160

Email: puremath@uwaterloo.ca

University of Waterloo

University of Waterloo

43.471468

-80.544205

200 University Avenue West

Waterloo,
ON,
Canada
N2L 3G1

The University of Waterloo acknowledges that much of our work takes place on the traditional territory of the Neutral, Anishinaabeg and Haudenosaunee peoples. Our main campus is situated on the Haldimand Tract, the land granted to the Six Nations that includes six miles on each side of the Grand River. Our active work toward reconciliation takes place across our campuses through research, learning, teaching, and community building, and is centralized within our Indigenous Initiatives Office.