## 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

Tuesday, April 4, 2023 — 9:00 AM EDT

**Eric Boulter, Department of Pure Mathematics, University of Waterloo**

**"Vector bundles on non-Kähler elliptic surfaces"**

Tuesday, April 4, 2023 — 10:00 to 10:00 AM EDT

**Aahan Chatterjee, Department of Pure Mathematics, University of Waterloo**

**"On Freimann’s Theorem"**

We discuss a proof of Freimann’s Theorem that states :

If A is a set of integers for which there is a set B such that |A|=|B| and |A+B| is at most C|A|, then there are constants d and S such that A is contained in a Generalized Arithmetic Progression of dimension at most d and size at most S|A|.

This seminar will be held both online and in person:

Tuesday, April 4, 2023 — 2:30 PM EDT

**Lucia Martin Merchan, Department of Pure Mathematics, University of Waterloo**

**"Formality of Joyce's manifolds (Part 2)"**

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.