## Contact Info

Pure MathematicsUniversity of Waterloo

200 University Avenue West

Waterloo, Ontario, Canada

N2L 3G1

Departmental office: MC 5304

Phone: 519 888 4567 x33484

Fax: 519 725 0160

Email: puremath@uwaterloo.ca

**Fall term update:** visit our COVID-19 Information website for more information.

Please note: The University of Waterloo is closed for all events until further notice.

Thursday, February 28, 2019 — 4:00 PM EST

**Levon Haykazyan, University of Waterloo**

"Pseudo-finite sets and dimension, Part 8"

I'll talk about unimodularity. It was introduced by Hrushovski in early 90s as a generalisation of local finiteness. Unimodularity has recently reappeared in the pseudo-finite setting as a tool to develop intersection theory.

MC 5403.

Wednesday, February 27, 2019 — 3:30 PM EST

**Zack Cramer, University of Waterloo **

“Matrix Algebras with a Certain Compression Property”

Tuesday, February 26, 2019 — 12:30 PM EST

**Erick Knight University of Toronto **

“The ζ3-Pell Equation” Abstract

Tuesday, February 26, 2019 — 10:30 AM EST

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

"Etale descent"

Following the Bakker-Brunebarbe-Tsimerman paper, we show that quotients by etale equivalence relations exist for definable analytic spaces.

MC 5479

Friday, February 15, 2019 — 2:30 PM EST

**Alessandro Malusà, University of Saskatchewan**

"Complex AJ conjecture"

Thursday, February 14, 2019 — 5:00 PM EST

****This talk was originally scheduled for February 12; it will now take place on February 14, 2019****

**Nick Manor, Department of Pure Mathematics, University of Waterloo**

"Do the Borromean rings exist?"

Thursday, February 14, 2019 — 12:30 PM EST

**Pat Naylor, Department of Pure Mathematics, University of Waterloo**

"Diagrammatic Methods in Topology"

A recent tool for understanding 4-manifolds is something called a “trisection.” These have the interesting advantage of changing problems about 4-manifolds to problems of combinatorics on surfaces. This talk will be an (accessible) tourist’s guide to some background and similar ideas from low(er) dimensional topology: Heegaard splittings and diagrams. Time permitting, we’ll also introduce a trisection and discuss some recent developments.

Wednesday, February 13, 2019 — 3:30 PM EST

**Sanaz Pooya, Stockholm University**

"On the Baum-Connes assembly map for certain semi-direct products"

Wednesday, February 13, 2019 — 3:30 PM EST

****This seminar has been cancelled and is rescheduled for February 27, 2019****

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

"The Isomorphism Problem for Pregeometries"

We continue our proof for showing that the isomorphism problem for rice pregeometries with Condition B is $\Pi^0_3$-hard.

MC 5413

Tuesday, February 12, 2019 — 10:30 AM EST

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

"Etale descent"

Following the Bakker-Brunebarbe-Tsimerman paper, we show that quotients by etale equivalence relations exist for definable analytic spaces.

MC 5479

Monday, February 11, 2019 — 4:00 PM EST

**Alex Wright, University of Michigan**

"Dynamics, geometry, and the moduli space of Riemann surfaces"

Thursday, February 7, 2019 — 4:00 PM EST

**[Talk rescheduled from February 6, 2019]**

**Sang-Gyun Youn, Queen's University**

"Sobolev embedding properties on compact matrix quantum groups"

Thursday, February 7, 2019 — 4:00 PM EST

**Abolfazl Alam, Shahid Beheshti University**

"Model Companion for Bounded Theories and some Related Complexity Questions"

Thursday, February 7, 2019 — 3:00 PM EST

**Ross Willard, Department of Pure Mathematics, University of Waterloo**

"Dualizing structures that are necessarily of infinite signature, part 3: the gory details"

In this lecture I will finish Pitkethly’s proof that her schizophrenic pair is in fact a dualizing pair. If time remains, I’ll sketch the proof that the term operations of the algebra are not determined by any finite-signature alter ego.

MC 5403

Wednesday, February 6, 2019 — 3:30 PM EST

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

"The Isomorphism Problem for Pregeometries"

We continue our proof for showing that the isomorphism problem for rice pregeometries with Condition B is $\Pi^0_3$-hard.

MC 5413

Tuesday, February 5, 2019 — 12:30 PM EST

**Richard Gottesman, Queen's University**

"Vector-Valued Modular Forms on $\Gamma_0(2)$"

Tuesday, February 5, 2019 — 10:30 AM EST

**Remi Jaoui, Department of Pure Mathematics, University of Waterloo**

"Coherence"

We discuss sections 2.2 and 2.3 of the Bakker-Brunebarbe-Tsimerman paper.

MC 5479

University of Waterloo

200 University Avenue West

Waterloo, Ontario, Canada

N2L 3G1

Departmental office: MC 5304

Phone: 519 888 4567 x33484

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