Events - 2014

Friday, October 24, 2014 — 1:00 PM EDT

Ruxandra Moraru, Department of Pure Mathematics, University of Waterloo

“Varieties versus schemes”

Last week, we saw the definition of a scheme. In this weeks talk, well present more examples of schemes and illustrate how, in some cases, schemes provide a better framework than varieties for studying certain geometric questions.

Thursday, October 23, 2014 — 4:30 PM EDT

Jonathan Herman, Pure Mathematics, University of Waterloo

"The Curvature of Curves and Surfaces"

Thursday, October 23, 2014 — 1:30 PM EDT

Jonas Jankauskas, Pure Mathematics, University of Waterloo

"There are no two non-real conjugates of a Pisot number with the same imaginary part"

In this talk, we will present the results from the recent arXiv paper by A. Dubickas, K. G. Hare and J. Jankauskas on the solution of three and four term linear equations in the conjugates of a Pisot number.

Tuesday, October 21, 2014 — 10:30 PM EDT

Ross Willard, Pure Mathematics, University of Waterloo

"Adding Gaussian elimination to local consistency checking - 2"

In this second of several lectures, I will present a polynomial-time consistency checking algorithm for constraint networks over a finite template having a Taylor polymorphism. I conjecture that the algorithm is complete for Maltsev templates, and in future lectures will provide evidence supporting this conjecture.

Tuesday, October 21, 2014 — 3:30 PM EDT

Mohammad Mahmoud, Pure Mathematics, University of Waterloo

"Torsion-free groups: linear independence and computable categoricity"

We continue through Melnikov's survey paper on Computable  
Abelian Groups. We use the effective analysis of linear independence
(discussed before by Sam) to characterize computable categoricity. We
go through the proof that "Every computable torsion-free

Tuesday, October 21, 2014 — 1:00 PM EDT

Jason Lotay, University College London

“Hyperkaehler 4-manifolds with boundary”

Monday, October 20, 2014 — 4:00 PM EDT

Jacob Tsimmerman, University of Toronto

“Bounding Torsion in Geometric Families of Abelian Varieties”

Friday, October 17, 2014 — 3:30 PM EDT

David Pitts, University of Nebraska

"Cartan Pairs and Extensions of Inverse Semigroups”

Friday, October 17, 2014 — 1:00 PM EDT

Shuntaro Yamagishi, Pure Mathematics, University of Waterloo

"Five or six things Ehsaan wants me to talk about"

Ehsaan gave me a list of five or six things he wants me to talk about this Friday. The list includes: the definition of ringed spaces, locally ringed spaces, schemes; an example of a non-affine scheme, etc. I plan to talk about these things.

Thursday, October 16, 2014 — 1:30 PM EDT

Fang Song, Institute for Quantum Computing University of Waterloo

“An efficient quantum algorithm for computing the unit group of an arbitrary degree number field”

Wednesday, October 15, 2014 — 3:30 PM EDT

Rahim Moosa, Department of Pure Mathematics, University of Waterloo

“A model theory for meromorphic dynamics?”

Wednesday, October 15, 2014 — 2:30 PM EDT

Jason Bell, Department of Pure Mathematics, University of Waterloo

“Etale Groupoid algebras, II: Leavitt path algebras”

Wednesday, October 15, 2014 — 1:30 PM EDT

Ritvik Ramkumar, Department of Pure Mathematics, University of Waterloo

“More K0”

Continuing where Philip left off, we will finish talking about K0of local rings and Dedekind domains.

Tuesday, October 14, 2014 — 1:00 PM EDT

Spiro Karigiannis, Pure Mathematics Department, University of Waterloo

“The first and second variation formulas for the volume functional in Riemannian geometry”

Tuesday, October 14, 2014 — 10:30 AM EDT

Ross Willard, Department of Pure Mathematics, University of Waterloo

“Adding Gaussian elimination to local consistency checking”

Friday, October 10, 2014 — 3:30 PM EDT

Raphael Clouatre, Department of Pure Mathematics, University of Waterloo

“Henkin measures for the multiplier algebra of the Drury-Arveson space”

Friday, October 10, 2014 — 2:30 PM EDT

Romina Arroyo, McMaster University

“Homogeneous Ricci solitons and the Alekseevskii conjecture in low dimensions”

Friday, October 10, 2014 — 1:00 PM EDT

Ty Ghaswala, Department of Pure Mathematics, University of Waterloo

“Intro-spec-tion”

So far we have been streaming ahead, defining an affine scheme without a moment’s hesitation. It is time to take a moment to still our minds and reflect.

Wednesday, October 8, 2014 — 1:30 PM EDT

Philip Xiao, Department of Pure Mathematics, University of Waterloo

K0 continued”

Tuesday, October 7, 2014 — 1:00 PM EDT

Jon Herman, Pure Mathematics Department, University of Waterloo

“Gauss’s Theorema Egregium”

Tuesday, October 7, 2014 — 1:00 PM EDT

Jon Herman, Pure Mathematics Department, University of Waterloo

“Gauss’s Theorema Egregium”

Friday, October 3, 2014 — 3:30 PM EDT

Dilian Yang, University of Windsor

“Cycline subalgebras of k-graph C*-algebras”

Friday, October 3, 2014 — 1:00 PM EDT

Ehsaan Hossain, Department of Pure Mathematics, University of Waterloo

“Defining Schemes: The Home Stretch”

Thursday, October 2, 2014 — 4:30 PM EDT

Ian Payne, Department of Pure Mathematics, University of Waterloo

“Normal Subgroups, Ideals, and Kernels”

Wednesday, October 1, 2014 — 1:30 PM EDT

Ty Ghaswala, Department of Pure Mathematics, University of Waterloo

“It will be OK: The adventures of K0

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