Events

Romina Arroyo, McMaster University

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

One of the most important open problems on Einstein homogeneous manifolds is ”Alekseevskii’s conjecture”. This conjecture says that any homogeneous Einstein space of negative scalar curvature is diffeomorphic to a Euclidean space.

Raphael Clouatre, Department of Pure Mathematics, University of Waterloo

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

A measure on the sphere is said to be Henkin for the ball algebra if it has a certain weak-* continuity property.

Ross Willard, Department of Pure Mathematics, University of Waterloo

“Adding Gaussian elimination to local consistency checking”

In this first of several lectures, I will present a polynomial-time consistency checking algorithm for constraint networks over a finite template having a

Spiro Karigiannis, Pure Mathematics Department, University of Waterloo

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

Let L be an immersed oriented submanifold of a Riemannian manifold (M, g) endowed with the induced metric.

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.

Jason Bell, Department of Pure Mathematics, University of Waterloo

“Etale Groupoid algebras, II: Leavitt path algebras”

This next lecture will consider a special type of Etale group algebras, namely Leavitt path algebras, which are algebraic analogues of graph C*-algebras.

Rahim Moosa, Department of Pure Mathematics, University of Waterloo

“A model theory for meromorphic dynamics?”

A rational dynamical system is a pair (X,f) where X is a projective algebraic variety and f is a dominant rational map from X to itself.

Fang Song, Institute for Quantum Computing University of Waterloo

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

Computing the unit group of a number field is one of the central problems in computational algebraic number theory.

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.

David Pitts, University of Nebraska

"Cartan Pairs and Extensions of Inverse Semigroups”

A pair (M, D) consisting of a von Neumann algebra M containing a MASA D is a Cartan pair if the span of

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Geometry & Topology seminar