# Events - 2016

Friday, December 16, 2016 — 2:30 PM EST

## Geometry & Topology Seminar

Karen Yeats, Combinatorics and Optimization, University of Waterloo

“An arithmetic graph invariant with applications in quantum field theory.”

Friday, December 9, 2016 — 4:00 PM EST

## Special Colloquium

Ben Webster, University of Virginia

“Representation theory of symplectic singularities”

Thursday, December 8, 2016 — 3:30 PM EST

## Analysis Seminar

Martijn Caspers, Utrecht University

“Absence of Cartan subalgebras for right angled Hecke von Neumann algebras.”

Friday, December 2, 2016 — 3:30 PM EST

## Analysis Seminar

Laurent Marcoux, Department of Pure Mathematics, University of Waterloo

“The complete boundedness property for amenable operator algebras

Friday, December 2, 2016 — 2:30 PM EST

## Geometry & Topology Seminar

Mark Stern, Duke University

“Instantons on ALF spaces”

I will discuss progress on establishing Cherkis’s Nahm transform for multicenter Taub NUT spaces.

This is joint work with Sergey Cherkis and Andres Larrain.

MC 5413

Friday, December 2, 2016 — 11:30 AM EST

## Ring Theory Seminar

Hongdi Huang, Department of Pure Mathematics, University of Waterloo

“Semisimple and Co-semisimple Hof algebras”

Friday, December 2, 2016 — 9:00 AM EST

## Geometric Analysis Working Seminar

Anthony McCormick, Department of Pure Mathematics, University of Waterloo

“Deformations of Complex Structures”

Today we’ll investigate some basic deformation theory for complex structures, culminating in a proof of the Tian Todorov lemma.

MC 5403

Thursday, December 1, 2016 — 12:30 PM EST

## Algebraic Geometry Seminar

Jiale Xie, Department of Combinatorics and Optimization, University of Waterloo

“Building the base of the Zariski topology”

Tuesday, November 29, 2016 — 3:30 PM EST

## Algebra Seminar

Renzhi Song, Department of Pure Mathematics, University of Waterloo

“Series parallel posets and NU polymorphisms”

In this talk I will try to explain what series parallel posets are and how to find 5-ary NU polymorphism on them.

QNC 1507

Tuesday, November 29, 2016 — 3:30 PM EST

## Computability Learning Seminar

Michael Deveau, Department of Pure Mathematics, University of Waterloo

“Hereditarily Finite Superstructures - Part 2”

Monday, November 28, 2016 — 4:00 PM EST

## Special Colloquium

Benjamin Hayes, Vanderbilt University

Friday, November 25, 2016 — 4:00 PM EST

## Special Colloquium

Michael Wibmer, University of Pennsylvania

Groups defined by algebraic difference equations

Friday, November 25, 2016 — 2:30 PM EST

## Geometry & Topology Seminar

Francesco Sala, Kavli Institute for the Physics and the Mathematics of the Universe

“Moduli spaces and stacks of sheaves on resolutions of toric singularities”

Friday, November 25, 2016 — 11:30 AM EST

## Ring Theory Learning Seminar

Hongdi Huang, Pure Mathematics, University of Waterloo

"Hopf Modules and Integrals"

Let $H$  be a hopf algebra. We will prove the fundamental theorem of $H$ hopf modules.  After that we investigate the connection between integrals and the rational part of $H^*$.

Thursday, November 24, 2016 — 4:00 PM EST

## Math Faculty Special Colloquium

Stefan Steinerberger, Yale University

“Mysterious New Interactions between Analysis and Number Theory”

Thursday, November 24, 2016 — 2:30 PM EST

## Logic Seminar

"Logical unification"

I will talk on preliminary work on the role of [0,1]-valued
logic in unifying the growing number of first order logics. In
particular, elementary classes in [0,1]-valued logic are CATs in the
sense of Ben Yaacov and the class of von Neumann algebras with faithful
actions on Hilbert spaces form an elementary class.

Thursday, November 24, 2016 — 1:30 PM EST

## Number Theory Seminar

Sneha Chaubey, University of Illinois

“Proportion of zeros of combinations of derivatives of Riemann-Xi function on the critical line”

Wednesday, November 23, 2016 — 4:00 PM EST

## Pure Math Graduate Student Colloquium

Satish Pandey, Pure Mathematics, University of Waterloo

"The Dinitz Problem and Five-Colouring Plane Graphs"

G. H. Hardy firmly believed that there is no permanent place for ugly Mathematics. Following his dictum, Paul Erdos liked to talk about "The Book" in which God maintains the perfect proofs for mathematical theorems. This talk is an attempt to explore Erdos'  idea of perfect proofs, and the territory we choose to explore is graph theory.

Monday, November 21, 2016 — 4:00 PM EST

## Special Colloquium

Vorrapan Chandee, Burapha University

“Moments of L-functions”

Friday, November 18, 2016 — 3:30 PM EST

## Analysis Seminar

Ignacio Garcia, Department of Pure Mathematics, University of Waterloo

Friday, November 18, 2016 — 2:30 PM EST

## Geometry & Topology Seminar

Tom Baird, Memorial University of Newfoundland

“The moduli space of Higgs bundles over a real curve and the real Abel-Jacobi ”

Friday, November 18, 2016 — 11:30 AM EST

## Ring Theory Seminar

Ehsaan Hossain, Department of Pure Mathematics, University of Waterloo

“Polycyclic groups and primitive group rings”

Thursday, November 17, 2016 — 3:00 PM EST

## Special Colloquium

Gregory Chambers, University of Chicago

“Problems in Quantitative Geometry”

Thursday, November 17, 2016 — 2:00 PM EST

## Logic Seminar

Michael Wan, University of California, Berkeley

“Towards a model theory of almost complex manifolds”

Thursday, November 17, 2016 — 1:30 PM EST

## Topas Theory Learning Seminar

Edward Lee and Ilia Chtcherbakov, University of Waterloo

“Topos Theory VI”

We finish off chapter 6 of Goldblatt: we discuss logical semantics in the context of an arbitrary topos. We then begin chapter 5: we see some first categorical properties of topoi.

MC 5403

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