## 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

**University COVID-19 update:** visit our Coronavirus Information website for more information.

Please note: The University of Waterloo is closed for all events until further notice.

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 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