Events

Michael Albanese, UQAM

"The Yamabe Invariant of Non-Kähler Surfaces"

The Yamabe invariant is a real-valued diffeomorphism invariant coming from Riemannian geometry. Using Seiberg-Witten theory, LeBrun showed that the sign of the Yamabe invariant of a Kähler surface is determined by its Kodaira dimension. We consider the extent to which this remains true when the Kähler hypothesis is removed.

This seminar will be held jointly online and in person:

Luke MacLean, Department of Pure Mathematics, University of Waterloo

"Coding isomorphisms without using relations"

Benoit Charbonneau and Spencer Whitehead, Department of Pure Mathematics, University of Waterloo

"Zometool workshop"

Hanging from the rafters of M3 is a Zometool construction of a projection of the 120-cell: one of five exceptional convex regular polytopes, and the four-dimensional analogue of the dodecahedron. This seminar is a hands-on learning activity, where participants have the chance to construct a Zometool 120-cell, as well as other projections of four-dimensional geometric constructions as time permits. 

Luke MacLean, Department of Pure Mathematics, University of Waterloo

"Coding isomorphisms without using relations (part 2)"

A grand introduction to computability theory will be given so that in part 3 we can answer the questions posed in part 1.

MC 5403

Talk #1 (9:30-10:30): Spiro Karigiannis, Department of Pure Mathematics, University of Waterloo 

Title: Calibrated subbundles of R^7, part II
Abstract: I will continue, and hopefully conclude, the discussion of calibrated subbundles in R^7. We will quickly review the previous talk and then focus on the coassociative case, which corresponds to negative superminimal surfaces.

Spencer Whitehead, Department of Pure Mathematics, University of Waterloo

"Clifford Algebras and Dirac Operators"

Sean Monahan, Department of Pure Mathematics, University of Waterloo

"An introduction to horospherical varieties"

I will introduce horospherical varieties, which are a generalization of toric varieties. Similarly to toric varieties, these have a combinatorial description in terms of polyhedral geometry. I will outline the key parts from the combinatorial description for toric varieties, and we will see how to generalize these to the horospherical setting.

MC 5403

Talk #1 (9:30 - 11:00 am): Daren Cheng, Department of Pure Mathematics, University of Waterloo

"A strong stability condition on minimal submanifolds and its implications, Part 1"

Speaker: None - this is a discussion-based seminar

Title: A Discussion on Universal Design for Learning

Please join us on Thursday, May 19 for the first teaching seminar of the Spring 2022 term. This session will be an open discussion on Universal Design for Learning (UDL): a way of thinking about teaching and learning that helps give all students an equal opportunity to succeed.

Spencer Whitehead, Department of Pure Mathematics, University of Waterloo

"Decomposing Clifford curvature"

In this talk we further refine the curvature term in the Weitzenbock formula to obtain the Lichnerowitz formula. As time allows, we will go through examples of Clifford bundles and their Dirac operators.

MC 5403