## 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 - March 2020

Friday, March 13, 2020 — 3:03 PM EDT

## Analysis Seminar

Ken Davidson, Department of Pure Mathematics, University of Waterloo

"Interpolation and duality in algebras of multipliers"

Wednesday, March 11, 2020 — 2:30 PM EDT

## Valuative Tree Seminar

Rahim Moosa, Department of Pure Mathematics, University of Waterloo

"Dynamics on the Berkovich line II"

I will continue to discuss how algebraic dynamics on the affine or projective line extend to the Berkovich  line. My aim is still Theorem 4.7 of Jonsson's notes.

MC 5403

Tuesday, March 10, 2020 — 2:30 PM EDT

## Algebra Seminar

Hongdi Huang, Department of Pure Mathematics, University of Waterloo

"On Hopf Ore Extensions and Zariski Cancellation Problems"

Tuesday, March 10, 2020 — 2:00 PM EDT

## Computability Learning Seminar

Luke MacLean, Department of Pure Mathematics, University of Waterloo

"Kleene's $\mathcal{O}$"

A computable ordinal is one that corresponds to the order type of some computable linear well ordering. It can be shown that these are a subset of the countable ordinals, but there is still an issue on how to name these ordinals. We would like a system of notation that allows us to compare two arbitrary ordinals.

Tuesday, March 10, 2020 — 1:30 PM EDT

## Number Theory Seminar

Siddhi Pathak, Penn State University

"Convolution of values of the Lerch zeta-function"

Tuesday, March 10, 2020 — 10:30 AM EDT

## Model Theory Learning Seminar

Christopher Hawthorne & Wilson Poulter, Department of Pure Mathematics, University of Waterloo

"NIP XIV"

We continue section 4.2 of Simon's Guide to NIP theories.

MC 5479

Tuesday, March 10, 2020 — 10:00 AM EDT

## Frobenius Algebras and TQFT Learning Seminar

Ben Anderson-Sackaney, Department of Pure Mathematics, University of Waterloo

We will begin discussing Frobenius algebras.

MC 5417

Monday, March 9, 2020 — 4:00 PM EDT

## Colloquium

Andrew Putman, University of Notre Dame

"The topology of the moduli space of curves"

The moduli space of curves is a remarkable space with connections to algebraic geometry, complex analysis, differential geometry, and low-dimensional topology.  I'll give an elementary introduction to it and discuss some recent work on its topology.

MC 5501

Friday, March 6, 2020 — 3:30 PM EST

Hayley Reid, Department of Pure Mathematics, University of Waterloo

Friday, March 6, 2020 — 3:00 PM EST

## Geometry & Topology Seminar

Gavin Ball, Université du Québec à Montréal and Centre de recherches mathématiques

"Closed G2-structures inducing a conformally flat metric"

Wednesday, March 4, 2020 — 2:30 PM EST

## Valuative Tree Seminar

Rahim Moosa, Department of Pure Mathematics, University of Waterloo

"Dynamics on the Berkovich line"

I will discuss how algebraic dynamics on the affine or projective line extend to the Berkovich  line. My aim is Theorem 4.7 of Jonsson's notes.

MC 5403

Tuesday, March 3, 2020 — 2:00 PM EST

## Computability Learning Seminar

Luke MacLean, Department of Pure Mathematics, University of Waterloo

"Kleene's $\mathcal{O}$"

Kleene's $\mathcal{O}$ is a system for ordinal notation used in computability theory that relates the concepts of constructive and computable ordinals. This notation allows one to unambiguously perform transfinite induction on ordinals by ensuring that there is a unique representation for each ordinal.

We will prove some properties about the notation system and show that there are ordinals which are not computable.

MC 5413

Tuesday, March 3, 2020 — 1:30 PM EST

## Number Theory Seminar

Sacha Mangarel, Centre de Recherches Mathématiques

"On Low Discrepancy Multiplicative Sequences"

Tuesday, March 3, 2020 — 10:30 AM EST

## Model Theory Learning Seminar

Wilson Poulter, Department of Pure Mathematics, University of Waterloo

"NIP XIII"

We continue section 4.1 of Simon's Guide to NIP theories.

MC 5479

Tuesday, March 3, 2020 — 10:00 AM EST

## Frobenius Algebras and TQFT Learning Seminar

Hongdi Huang, Department of Pure Mathematics, University of Waterloo

In the half part, we will complete the leftover on the generators and relations. Then we will setup for Frobenius algebras. Finally, we will go-ahead to the algebra structure.

MC 5417

Monday, March 2, 2020 — 4:00 PM EST

## Colloquium

Ilan Hirshberg, Ben Gurion University of the Negev

"Mean dimension and radius of comparison"

### March 2020

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