# Events - July 2021

Thursday, July 29, 2021 — 9:30 AM EDT

## PhD thesis defence

Ragini Singhal, Department of Pure Mathematics, University of Waterloo

"Deformation theory of nearly $\rm{G}_2$-structures and nearly $\rm{G}_2$ instantons"

Wednesday, July 28, 2021 — 3:00 PM EDT

## Analysis Student Seminar

Padraig Daly, Department of Pure Mathematics, University of Waterloo

"Quantum Superchannels"

Wednesday, July 28, 2021 — 12:30 PM EDT

## Differential Geometry Working Seminar

Daren Cheng, Department of Pure Mathematics, University of Waterloo

"The second variation of area of minimal surfaces in four-manifolds (Part 2)"

Wednesday, July 28, 2021 — 11:00 AM EDT

## Differential Geometry Working Seminar

Max Chemtov, Department of Pure Mathematics, University of Waterloo

"Subalgebras of so(7) Induced by the Coassociative 4-Form on R^7"

Consider the 2-forms on R^7 resulting from evaluating the coassociative 4-form on two vectors. It turns out that, when such vectors are restricted to an associative 3-plane P, these 2-forms along with those in Λ^2(P) give a subalgebra of so(7) isomorphic to so(3) ♁ so(3). After giving some brief context, we will discuss this fact and characterize the intersections of such subalgebras for different choices of P.

Monday, July 26, 2021 — 11:00 AM EDT

## Algebraic Geometry Working Seminar

Spencer Whitehead, Department of Pure Mathematics, University of Waterloo

"A brief introduction to characteristic classes"

Wednesday, July 21, 2021 — 3:00 PM EDT

## Analysis Student Seminar

Adina Goldberg, Department of Pure Mathematics, University of Waterloo

"Quantum Arrows"

Wednesday, July 21, 2021 — 12:00 PM EDT

## Math Faculty Teaching Seminar

Ryan Clemmer and Sarah DeDecker, University of Guelph

"Designing Assessments to Encourage Problem Analysis"

Wednesday, July 21, 2021 — 11:00 AM EDT

## Differential Geometry Working Seminar

Spiro Karigiannis, Department of Pure Mathematics, University of Waterloo

"Metric compatible connections in dimension 3"

Wednesday, July 21, 2021 — 9:00 AM EDT

## Student Number Theory Seminar

Nolan Pyott, Department of Pure Mathematics, University of Waterloo

"Counting Primes using Seldberg's Sieve"

Monday, July 19, 2021 — 11:00 AM EDT

## Algebraic Geometry Working Seminar

Sean Monahan, Department of Pure Mathematics, University of Waterloo

"Divisors on toric varieties"

I will continue from the last few talks on divisors by highlighting some important features of the toric case. The focus will be on torus invariant divisors and tools for computing the class group and Picard group of toric varieties.

Zoom meeting:

• Meeting ID: 811 2094 8164
• Passcode: 033003
Wednesday, July 14, 2021 — 3:00 PM EDT

## Analysis Student Seminar

Nick Manor, Department of Pure Mathematics, University of Waterloo

"Nonunital operator systems and noncommutative convexity"

Wednesday, July 14, 2021 — 11:00 AM EDT

## Differential Geometry Working Seminar

Daren Cheng, Department of Pure Mathematics, University of Waterloo

"The second variation of area of minimal surfaces in four-manifolds"

Monday, July 12, 2021 — 11:00 AM EDT

## Algebraic Geometry Working Seminar

Ruxandra Moraru, Department of Pure Mathematics, University of Waterloo

"Divisors and line bundles, Part III"

In this week's talk, we finally describe the relationship between divisors and line bundles on complex varieties, illustrating it with some explicit examples.

Zoom meeting:

• Meeting ID: 811 2094 8164
• Passcode: 033003
Wednesday, July 7, 2021 — 3:00 PM EDT

## Analysis Student Seminar

Daniel Perales Anaya, Department of Pure Mathematics, University of Waterloo

"On the anti-commutator of two free random variables"

Wednesday, July 7, 2021 — 11:00 AM EDT

## Differential Geometry Working Seminar

Aidan Patterson, Department of Pure Mathematics, University of Waterloo

"Local Normal Forms for Hamiltonian Actions of Poisson-Lie Groups"

Wednesday, July 7, 2021 — 9:00 AM EDT

## Student Number Theory Seminar

Spencer Gao, Department of Pure Mathematics, University of Waterloo

"Representation of General Linear Group over Finite Field"

This talk aims at discussing the techniques used in finding all the irreducible representations of general linear groups over finite fields. A brief overview of representation theory is also provided, but no such overview is provided for group theory and field theory.

Monday, July 5, 2021 — 11:00 AM EDT

## Algebraic Geometry Working Seminar

Ruxandra Moraru, Department of Pure Mathematics, University of Waterloo

"Divisors and line bundles, Part II"

This week, we finish the discussion we started last week on the relationship between divisors and line bundles on complex varieties. We also describe the divisor class groups and the Picard groups of toric varieties.

The seminar will meet on Zoom:

• Meeting ID: 811 2094 8164
• Passcode: 033003

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