Events tagged with webnotice

Monday, January 30, 2023 — 2:30 PM EST

Ian Hambleton, McMaster University

"Euler Characteristics and 4-manifolds"

The topology and total curvature of a Riemann surface is determined by a single integer, the Euler characteristic (Leonhard Euler, 1707-1783). In dimension four and higher, the Euler characteristic gives an interesting invariant for finitely presented groups. The talk will survey some recent joint work with Alejandro Adem on this theme.

MC 5501

Tuesday, January 31, 2023 — 10:00 AM EST

Jeremy Champagne, Department of Pure Mathematics, University of Waterloo

"Geometry of numbers as a tool for Diophantine approximation"

Anybody who has taken a course on algebraic number theory, has probably seen Minkowski's convex body theorem as a mean to prove the finiteness of class groups. However, less people know about Minkowski's second convex body theorem, which gives much more insight into this problem of finding integer points with certain properties.

Tuesday, January 31, 2023 — 2:30 PM EST

Spiro Karigiannis, Department of Pure Mathematics, University of Waterloo

"Nearly Kahler 6-manifolds have SU(3)-structures"

Tuesday, January 31, 2023 — 2:30 PM EST

Elliot Kaplan, McMaster University

"Hilbert polynomials for finitary matroids"

Tuesday, January 31, 2023 — 3:30 PM EST

David McKinnon, Department of Pure Mathematics, University of Waterloo

"Gaussian integers and gcds"

Wednesday, February 1, 2023 — 11:00 AM EST

Changho Han, Department of Pure Mathematics, University of Waterloo

"A Brief Introduction to the General MMP Part 2"

Continuing from where we left off last time, I will discuss singularities of the MMP. Then, I will give a brief explanation of how the higher-dimensional MMP works; note that there will be some key differences from the surface case, including flips.

This seminar will be held jointly online and in person:

Wednesday, February 1, 2023 — 1:00 PM EST

Leo Jimenez, Department of Pure Mathematics, University of Waterloo

"Not pfaffian, Part II"

James Freitag has shown that the j-function is not Pfaffian using the model theory of differentially closed fields. We will work though his paper, entitled "Not pfaffian".

MC 5417

Thursday, February 2, 2023 — 10:00 AM EST

Nicolas Banks, Department of Pure Mathematics, University of Waterloo

"Dual Isogenies, the Weil Pairing, and the Structure of Endomorphism Rings"

We conclude our review of the geometry of elliptic curves by studying dual isogenies. This allows us to prove important results on torsion elements on elliptic curves, culminating in the construction of the Weil pairing and the algebraic structure of rings of isogenies.

MC 5403

Thursday, February 2, 2023 — 2:30 PM EST

Michael Albanese, Department of Pure Mathematics, University of Waterloo

"Spin^h and further generalisations of spin"

Friday, February 3, 2023 — 3:00 PM EST

Robert Martin, University of Manitoba

"Non-commutative measure theory"

Friday, February 3, 2023 — 4:30 PM EST

Sean Monahan, Department of Pure Mathematics, University of Waterloo

"Spot it! and why it! (works)"

Do you like to play games? Can you easily distinguish different shapes? Are you at least 6 years old? Well then I've got the perfect game for you! It's called Spot it! (or Dobble if you're not from 'Merica). Fundamentally, the game is about quickly spotting the common symbol displayed on a given pair of cards. In this talk we will see the math behind why this game works. Spoiler: it's projective geometry!

Monday, February 6, 2023 — 2:30 PM EST

Ronnie Nagloo, University of Illinois at Chicago

"Applications of model theory to functional transcendence"

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