## 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

Friday, March 13, 2020 — 3:03 PM EDT

**Ken Davidson, Department of Pure Mathematics, University of Waterloo**

"Interpolation and duality in algebras of multipliers"

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

**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

**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

**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

**Siddhi Pathak, Penn State University**

"Convolution of values of the Lerch zeta-function"

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

**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

**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

**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**

"The Law of Quadratic Reciprocity"

Friday, March 6, 2020 — 3:00 PM EST

**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

**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

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

**Sacha Mangarel, Centre de Recherches Mathématiques**

"On Low Discrepancy Multiplicative Sequences"

Tuesday, March 3, 2020 — 10:30 AM EST

**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

**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

**Ilan Hirshberg, Ben Gurion University of the Negev**

"Mean dimension and radius of comparison"

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 Office of Indigenous Relations.