## 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

Tuesday, October 17, 2017 — 1:30 PM EDT

**Diana Castaneda Santos, Department of Pure Mathematics, University of Waterloo**

"Review (Episode 3)"

We will continue our review of schemes. We will mention some examples of schemes that are not affine schemes. We will review the proj construction, and more topological properties of schemes. If time permits we'll define morphisms of schemes.

MC 5413

Tuesday, October 17, 2017 — 4:00 PM EDT

**Levon Haykazyan, Department of Pure Mathematics, University of Waterloo**

"Introduction to Positive Logic"

Wednesday, October 18, 2017 — 3:30 PM EDT

**Sascha Troscheit, Department of Pure Mathematics, University of Waterloo**

"Branching Processes, Martingales, Kingman’s Subadditive Ergodic Theorem, and some applications, Part III: The probability of deviating from the mean behaviour"

Thursday, October 19, 2017 — 1:30 PM EDT

**John Friedlander, University of Toronto**

"Exceptional characters and their consequences"

We review some history about the possible existence of certain Dirichlet characters which might possess a zero very close to the line $Re s = 1$ and the remarkably strong consequences which could be derived under the assumption of their existence.

MC 5501

Thursday, October 19, 2017 — 2:30 PM EDT

**Adam Dor On, Technion**

"Cuntz-Nica-Pimsner algebras over $\mathbb{N}^d$"

An effective model for encoding multivariable dynamical systems via C*-algebras is given by Toeplitz-Nica-Pimsner algebras introduced by Fowler. In the work of Carlsen, Larsen, Sims and Vitadello, the right notion of a "boundary quotient" *Cuntz*-Nica-Pimsner algebra is established, but the precise relations between minimal generators are sometimes very difficult to ascertain.

Thursday, October 19, 2017 — 3:30 PM EDT

**Justin Laverdure, Department of Pure Mathematics, University of Waterloo**

"A finite pointed group with no finite basis, Part 1"

We'll go over a construction of Roger Bryant, by building a finite pointed group (P,p) with no finite basis for its laws, as far as we can go. We'll recap basic equational theory stuff, then wade knee-deep into semidirect products and counting arguments.

MC 5413

Friday, October 20, 2017 — 2:30 PM EDT

**Esther Cabezas-Rivas, Universität Frankfurt**

"Ricci flow beyond non-negative curvature conditions"

We generalize most of the known Ricci flow invariant non-negative curvature conditions to less restrictive negative bounds that remain sufficiently controlled for a short time.

Friday, October 20, 2017 — 3:30 PM EDT

**Yiu-Tung Poon, Iowa State University**

"(*p*,*q*) Matricial Range and Quantum Information Science"

Monday, October 23, 2017 — 4:00 PM EDT

**Damien Roy, University of Ottawa**

"Diophantine curiosities"

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