# Events - January 2016

Friday, January 15, 2016 — 4:30 PM EST

## String Theory Seminar

Henry Liu, Department of Pure Mathematics, University of Waterloo

“Quantizing the String”

Friday, January 15, 2016 — 3:30 PM EST

## Analysis Seminar

Jimmy He, Pure Math Department, University of Waterloo

“Smoothness of convolution products of orbital measures on rank one compact symmetric spaces”

Thursday, January 14, 2016 — 3:30 PM EST

## Model Theory Learning Seminar

Christopher Hawthorne, Pure Mathematics, University of Waterloo

We will work through chapter 7 of Tent and Ziegler. We will develop the notions of forking and dividing as measures of how strongly a set depends on a set of parameters. We will then introduce simple theories, an important generalization of stable theories.

Thursday, January 14, 2016 — 2:30 PM EST

## Universal Algebra Seminar

Ian Payne, Department of Pure Mathematics, University of Waterloo

"A result on constraint satisfaction problems"

Thursday, January 14, 2016 — 1:30 PM EST

## Number Theory Seminar

Kevin Hare, Pure Math Department, University of Waterloo

“Beta representations and Pisot numbers”

Thursday, January 14, 2016 — 1:00 PM EST

## Model Theory Learning Seminar

Christopher Hawthorne, Pure Mathematics, University of Waterloo

We will work through chapter 7 of Tent and Ziegler. We will develop the notions of forking and dividing as measures of how strongly a set depends on a set of parameters. We will then introduce simple theories, an important generalization of stable theories.

Thursday, January 14, 2016 — 11:30 AM EST

## Ring theory learning seminar

Ehsaan Hossain, Pure Mathematics, University of Waterloo

"Morita theory 1: Modules"

Let $\mathrm{Mod}_R$ be the category of right $R$-modules. Two rings $R,S$ are \textit{Morita equivalent}, denoted $R\sim S$, if $\mathrm{Mod}_R$ and $\mathrm{Mod}_S$ are equivalent as categories. For example $\mathbf{C}$ is Morita equivalent to $M_2(\mathbf{C})$, because any $\mathbf{C}$-vector space can double up to become an $M_2(\mathbf{C})$-module. Many properties are Morita invariant; for instance simplicity, semisimplicity, and chain conditions.

Wednesday, January 13, 2016 — 3:30 PM EST

## Computability Learning Seminar

Jonathan Stephenson, Department of Pure Mathematics, University of Waterloo

“2-randomness and complexity”

We will begin our proof that Z is 2-random if and only infinitely many of its initial segments are incompressible in the sense of plain complexity.

Wednesday, January 13, 2016 — 2:30 PM EST

## Fractal Geometry Seminar

Kevin Hare, University of Waterloo

“Self Affine Maps”

Wednesday, January 13, 2016 — 1:00 PM EST

## Algebraic Geometry Working Seminar

Raymond Cheng, Department of Pure Mathematics, University of Waterloo

"Topologies in Algebraic Geometry"

Tuesday, January 12, 2016 — 3:30 PM EST

## Model Theory of Berkovich Spaces

Deirdre Haskell, McMaster University

Abstract

This term we will be reading through Ducros Bourbaki article, “Les espaces Berkovich sont moderes [dapres Ehud Hrushovski et Francois Loeser]. We start with the overview given in the introduction.

MC 5403

Tuesday, January 12, 2016 — 1:00 PM EST

## Model Theory Learning Seminar

Christopher Hawthorne, Pure Mathematics, University of Waterloo

We will work through chapter 7 of Tent and Ziegler. We will develop the notions of forking and dividing as measures of how strongly a set depends on a set of parameters. We will then introduce simple theories, an important generalization of stable theories.

Friday, January 8, 2016 — 4:30 PM EST

## String Theory Seminar

Henry Liu, Department of Pure Mathematics, University of Waterloo

“Stringy Actions and Gauge Fixing”

Friday, January 8, 2016 — 3:30 PM EST

## Analysis Seminar

Robert Martin, University of Cape Town

“Multipliers between deBranges-Rovnyak subspaces of Drury-Arveson space”

Thursday, January 7, 2016 — 2:10 PM EST

## Geometric Analysis Working Seminar

Geometric Analysis Working Seminar

Organizational Meeting

Wednesday, January 6, 2016 — 3:30 PM EST

## Computability Learning Seminar

Jonathan Stephenson, Department of Pure Mathematics, University of Waterloo

“Stronger Notions of Randomness”

Last semester we studied Martin-Lof randomness, and the weaker notion of Schnorr ran- domness. We will now introduce 2-randomness and weak 2-randomness, which are stronger notions than Martin-Lof randomness.

Tuesday, January 5, 2016 — 3:30 PM EST

## Analysis Seminar

Michael Brannan, Texas A M University

“Matricial microstates for quantum group von Neumann algebras”

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