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Friday, October 21, 2022 10:30 am - 10:30 am EDT (GMT -04:00)

Logic Seminar

Ross Willard, Department of Pure Mathematics, University of Waterloo

"Finite axiomatizability problems for finite algebras"

Friday, October 21, 2022 4:30 pm - 4:30 pm EDT (GMT -04:00)

Pure Math Grad Colloquium

Xingchi Ruan, Department of Pure Mathematics, University of Waterloo

"Lower bounds on solubility of Diophantine systems"

Given a system of r homogeneous polynomial equations with degree d with rational coefficients, we study the number of variables it needs to possess a non-trivial p-adic solution. We focus on the lower bound of this number. We learn the history and prototype of the problem, as well as the most precise estimation of the lower bound so far.

MC 5479

Tuesday, October 18, 2022 10:00 am - 10:00 am EDT (GMT -04:00)

Student Number Theory Seminar

Owen Sharpe, Department of Pure Mathematics, University of Waterloo

"Primality Testing and Integer Factorization"

Primality testing and integer factorization are mathematical problems which have occupied number theorists throughout the centuries. They have become very important in the field of cryptography over the last fifty years. We give a brief history of primality testing and integer factorization algorithms, from the sieve of Eratosthenes to the AKS test, and from trial division to Shor's algorithm.

Monday, October 17, 2022 2:30 pm - 2:30 pm EDT (GMT -04:00)

Colloquium

**This talk is rescheduled for November 28, 2022**

Catherine Pfaff, Queen's University

"Deformation Spaces, R-Trees, & What Happens When You Iterate a Free Group Automorphism"

Tuesday, October 4, 2022 12:30 pm - 12:30 pm EDT (GMT -04:00)

Algebraic Geometry Working Seminar

Changho Han, Department of Pure Mathematics, University of Waterloo

“Periods I: Elliptic Curves and Hodge Theory”


This is the first talk in the series of two talks with the goal of introducing a method of
parametrizing isomorphism classes of certain varieties using analytic techniques; even if it’s
analytic, this particular construction (of using ”periods”) plays key roles in algebraic side of
algebraic geometry and number theory as well. In this first talk, I will showcase the standard

Friday, October 7, 2022 10:30 am - 10:30 am EDT (GMT -04:00)

Logic Seminar

Leo Jimenez, Department of Pure Math, University of Waterloo

"Expansions of the group of integers"