Events

Oğuz Şavk, Bogaziçi University

"Classical and new plumbings bounding contractible manifolds and homology balls"

A central problem in low-dimensional topology asks which homology 3-spheres bound contractible 4-manifolds and homology 4-balls. In this talk, we address this problem for plumbed 3-manifolds and we present the classical and new results together. Our approach is based on Mazur’s famous argument which provides a unification of all results in a fairly simple way.

We’re starting up an arithmetic geometry seminar, online, and we’d like to include anyone who wants to participate.  The starting point will be the book by Hindry and Silverman on Diophantine Geometry, but we may quickly diverge into other directions.  I don’t expect this to be the regular meeting time – the most important part of the first meeting will be to decide on a regular meeting time.  So if you can’t make it to the organizational meeting, please email David McKinnon to say what your scheduling constraints are.

Linda Westrick, Pennsylvania State University

"Luzin's (N) and randomness reflection"

Sean Monahan, Department of Pure Mathematics, University of Waterloo

Da Rong Cheng, Department of Pure Mathematics, University of Waterloo

"Non-minimizing solutions to the Ginzburg-Landau equations"

Shengda Hu, Wilfrid Laurier University

"Some computations for connections in generalized geometry"

We look at generalized connections on a Riemannian manifold. We will consider curvature in generalized geometry and look to extend classical computations to the generalized situation.

Zoom meeting: contact Spiro Karigiannis (karigiannis@uwaterloo.ca) or Ragini Singhal (r4singha@uwaterloo.ca) for link.

Shuo Gao, Department of Pure Mathematics, University of Waterloo

"Introduction to Elementary Sieve"

This talk aims at introducing sieve theory in an elementary way. Sieve problem and two elementary sieves  - larger sieve and square sieve - will be discussed in detail, as well as their applications and a broad overview of the historical development of sieve theory. Some standard results including the Mobius inversion formula will also be covered in this talk to make the proof self-contained.

Jason Siefken, University of Toronto

"Onboarding Instructors to an Active Learning Class"

Shayla Redlin, Department of Combinatorics & Optimization, University of Waterloo

"Counting Antichains in the Boolean Lattice"

Sean Monahan, Department of Pure Mathematics, University of Waterloo

"An introduction to toric varieties"

Toric varieties are a special kind of variety equipped with a group action from an algebraic torus. These varieties are very nice to work with because they have a combinatorial interpretation involving polyhedral geometry. I will (very quickly) introduce toric varieties and focus on some concrete examples.

The seminar will meet on Zoom.
Meeting ID: 811 2094 8164
Passcode: 033003