Events

Nickolas Rollick, Pure Mathematics, University of Waterloo

"A Proper Separation -- The Variety Show"

Well, it has only taken two years, but we are finally ready to give the scheme-theoretic definition of "variety".  Along the way, we discuss the notions algebraic geometers use in place of "Hausdorff" and "compact Hausdorff", namely "separated" and "proper" morphisms.  Somehow, it seems fitting to talk about "separation" as we bring this seminar to a close...

Tobias Fritz, Max Planck Institute for Mathematics in the Sciences and the Perimeter Institute

"Hypergraph C*-algebras"

David Urbanik, Department of Pure Mathematics, University of Waterloo

"Explicit Equations for Hyperelliptic Jacobians and Their Group Law"

Renzhi Song, Department of Pure Mathematics, University of Waterloo

"Series-Parallel Posets and Polymorphisms"

The complexity of the retraction problem for series-parallel posets is known to be in P for those that satisfy the 4-crown condition. We will show how we can improve on this to show that it is in NL. Furthermore we will show that satisfying the 4-crown condition is equivalent to admitting Freese-McKenzie polymorphisms. This establishes an equivalence between all of properties mentioned above for series-parallel posets. 

MC 2009

Benjamin Anderson-Sackaney, Department of Pure Mathematics, University of Waterloo

"Fourier-Stieltjes algebras"

John Sawatzky, Department of Pure Mathematics, University of Waterloo

"Fourier algebras"

Andrej Vukovic, Department of Pure Mathematics, University of Waterloo

"Homotopy Type Theory and Univalent Foundations"

An organizational meeting for the Model Theory Seminar will be held on Thursday, September 6 at 3:30 pm in MC 5403.

Andrew Nicas, McMaster University

"Metric transforms yielding Gromov hyperbolic spaces"

Tyrone Ghaswala, University of Manitoba

"Amalgamated free products of circularly ordered groups"