## 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

**Returning to in-person experiences in February:** Visit the COVID-19 website for more information.

Monday, January 19, 2015 — 2:30 PM EST

Friday, January 16, 2015 — 4:00 PM EST

Friday, January 16, 2015 — 3:30 PM EST

Friday, January 16, 2015 — 1:00 PM EST

Thursday, January 15, 2015 — 4:00 PM EST

In this talk, I will embark on an informal review of the global theory of algebraic number fields: integrality, discriminants and integral bases, Dedekind domains, fractional ideals and the ideal class group, Minkowski theory, Dirichlet's unit theorem, splitting of primes, as time permits. Motivation for class field theory will be discussed.

Wednesday, January 14, 2015 — 2:30 PM EST

Monday, January 12, 2015 — 2:30 PM EST

Friday, January 9, 2015 — 3:23 PM EST

Ross Willard, Pure Mathematics, University of Waterloo

Putting together some of the machinery developed this term, I will prove Larose’s Theorem: if X is a ﬁnite, connected reﬂexive digraph and X admits a Taylor operation, then for every k ≥ 1, the k-th homotopy group of X is trivial.

Friday, January 9, 2015 — 2:30 PM EST

In this talk I will explain why the ancestor GW correlation functions for an elliptic orbifold are quasi-modular forms.

Friday, January 9, 2015 — 1:00 PM EST

Wednesday, January 7, 2015 — 2:30 PM EST

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 Indigenous Initiatives Office.