## 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.

Tuesday, July 30, 2019 — 1:00 PM EDT

**Matthew Satriano, Department of Pure Mathematics, University of Waterloo **

“The valuative tree in action”

A sketch of Xie’s proof of Medvedev-Scanlon for Affine 2-space

Tuesday, July 30, 2019 — 9:00 AM EDT

**Anton Iliashenko and Spiro Kargiannis, Department of Pure Mathematics University of Waterloo **

“First and Second variation of the Volume functional”

Abstract

In this talk we will derive the first and second variational formulas for the volume functional of a submanifold.

“Vector cross products and calibrations: some non-standard inner product space theory”

Monday, July 29, 2019 — 4:00 PM EDT

**Martin Hils, Universitat Munster **

“Equivariant definable deformation retractions in non-archimedean geometry” (joint work with Ehud Hrushovski and Pierre Simon)”

Monday, July 29, 2019 — 1:30 PM EDT

**Pawel Sarkowicz, Department of Pure Mathematics, University of Waterloo**

“Separable Exact C*-Algebras”

Friday, July 26, 2019 — 1:30 PM EDT

**Hongdi Huang, Department of Pure Mathematics, University of Waterloo**

"The Zariski Cancellation Problem"

Wednesday, July 24, 2019 — 4:30 PM EDT

"Graphs in algebra and algebra in graphs"

Tuesday, July 23, 2019 — 2:30 PM EDT

**Ali Aleyasin, Department of Pure Mathematics, University of Waterloo**

"Riemannian cones in disguise: singular elliptic PDEs"

Monday, July 22, 2019 — 1:00 PM EDT

**Brett Nasserden, Department of Pure Mathematics, University of Waterloo**

"The valuative tree in action"

Friday, July 12, 2019 — 2:30 PM EDT

**Jacob Campbell, Department of Pure Mathematics, University of Waterloo**

This is the first meeting of a learning seminar which will run for most of July and August. The proposed day/time for the seminar is on Fridays, 2:30 to 3:30 pm.

In the first few meetings of the seminar we will look at the representation theory of the finite symmetric groups S_n, following the approach of Okounkov and Vershik, which emphasizes the branching rule and the use of Jucys-Murphy elements (all these terms are to be explained as the seminar goes on).

Thursday, July 4, 2019 — 4:00 PM EDT

**Ian Charlesworth, University of California, Berkeley**

"Free Stein Irregularity"

Thursday, July 4, 2019 — 10:00 AM EDT

**Luke MacLean, Department of Pure Mathematics, University of Waterloo**

"Different extensions of first-order logic (part 2)"

Having given definitions and examples of two different extensions of first-order logic, I will proceed to sketch a proof that a computably axiomatizable theory is finitely axiomatizable using additional predicates. Knowledge of the first part is not necessary.

MC 5479

Wednesday, July 3, 2019 — 10:00 AM EDT

**Anton Mosunov, Department of Pure Mathematics, University of Waterloo**

"Generalizations of the Gap Principle and the Thue-Siegel Principle, With Applications to Diophantine Equations"

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