## 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

Thursday, December 15, 2022 — 2:30 PM EST

**Hongyi Liu, University of California, Berkeley**

**"A compactness theorem for hyperkähler 4-manifolds with boundary"**

Thursday, December 8, 2022 — 4:30 PM EST

**Rian Neogi, Combinatorics & Optimization, University of Waterloo**

**"The Birth of Computation"**

In 1928, Hilbert posed the Entscheidungsproblem, which is informally stated as follows: "Given a mathematical statement, is there a well-defined procedure by which one can decide whether the statement is true or false?". This is a natural question for mathematicians to ask. Essentially the question asks whether one can solve mathematical problems in some automatic and structured manner, or must we rely on human insight, wit and intuition?

Thursday, December 8, 2022 — 2:30 PM EST

**Adrian Zahariuc, University of Windsor**

**"Configurations of points modulo translation"**

Tuesday, December 6, 2022 — 4:00 PM EST

**Yash Singh, Department of Pure Mathematics, University of Waterloo**

**"Galois theory and the Jugendtraum"**

The talk will be a gentle introduction to Galois theory and the problem of abelian extensions of number fields known as Kronecker's Jugendtraum. We also focus on a particular case of this problem which will showcase a remarkable connection with elliptic curves.

MC 5501

Tuesday, December 6, 2022 — 2:00 PM EST

**Paul Cusson, Department of Pure Mathematics, University of Waterloo**

**"A proof of the Newlander-Nirenberg Theorem"**

Thursday, December 1, 2022 — 2:30 PM EST

**Eric Riedl, University of Notre Dame**

**"Plane curves, log tangent sheaves and the Geometric Lang-Vojta Conjecture"**

Thursday, December 1, 2022 — 1:00 PM EST

**Sean Monahan, Department of Pure Mathematics, University of Waterloo**

**Local structure results and toroidal horospherical varieties**

I plan to talk about some local structure results for horospherical varieties, and look at the special case of so-called “toroidal” horospherical varieties. As of right now, this should be the last talk of the semester; we plan to continue next term (possibly at a new time/location).

This seminar will be held jointly online and in person:

Thursday, December 1, 2022 — 10:30 AM EST

**Xinyue (Cynthia) Xie & Layth Al-Hellawi, Department of Pure Mathematics, University of Waterloo **

**"Effectiveness properties of the Walker's Cancellation Theorem - Part IV"**

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.