## University COVID-19 update

### Questions about buildings and services? Visit the list of Modified Services.

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

# Events - February 2019

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

## Model Theory Seminar

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

## Analysis Seminar

Zack Cramer, University of Waterloo

“Matrix Algebras with a Certain Compression Property”

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

## Number Theory Seminar

Erick Knight University of Toronto

“The ζ3-Pell Equation” Abstract

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

## o-minimal GAGA Seminar

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

## Geometry & Topology Seminar

Alessandro Malusà, University of Saskatchewan

"Complex AJ conjecture"

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

## Graduate Student Colloquium

**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

## PhD Student Research Seminar

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

## Analysis Seminar

Sanaz Pooya, Stockholm University

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

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

## Computability Learning Seminar

**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

## o-minimal GAGA Seminar

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

## Pure Math Colloquium

Alex Wright, University of Michigan

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

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

## Analysis Seminar

[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

## Model Theory Seminar

Abolfazl Alam, Shahid Beheshti University

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

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

## Universal Algebra Seminar

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

## Computability Learning Seminar

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

## Number Theory Seminar

Richard Gottesman, Queen's University

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

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

## o-minimal GAGA Seminar

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

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