Events by date

Sean Monahan, Department of Pure Mathematics, University of Waterloo

"Flipping horospherical varieties"

(the title should be read in John Sawatzky’s voice). In what is likely the final talk of the seminar, we will see how flips work in the context of MMP on horospherical varieties. This is following section 4 of Brion’s paper “Variétés sphériques et théorie de Mori”.

This seminar will be held jointly online and in person:

Leo Jimenez, Department of Pure Mathematics, University of Waterloo

"Uncollapsed Hrushovski constructions"

Hrushovski constructions have been used to construct many counterexamples in model theory, and also have interactions with combinatorics. In their uncollapsed, infinite rank form, they are very similar to the classical Fraisse limits. I will go through the basic properties of uncollapsed Hrushovski constructions, following David Evan's note "An introduction to ampleness".

MC 5417

Ruxandra Moraru, Department of Pure Mathematics, University of Waterloo

"Deformation theory of vector bundles and of Hitchin pairs"