## Contact Info

Pure MathematicsUniversity of Waterloo

200 University Avenue West

Waterloo, Ontario, Canada

N2L 3G1

Departmental office: MC 5304

Phone: 519 888 4567 x43484

Fax: 519 725 0160

Email: puremath@uwaterloo.ca

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

**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

**Ben Webster, University of Virginia **

“Representation theory of symplectic singularities”

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

**Martijn Caspers, Utrecht University **

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

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

**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

**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

**Hongdi Huang, Department of Pure Mathematics, University of Waterloo **

“Semisimple and Co-semisimple Hof algebras”

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

**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

**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

**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

**Michael Deveau, Department of Pure Mathematics, University of Waterloo **

“Hereditarily Finite Superstructures - Part 2”

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

**Benjamin Hayes, Vanderbilt University**

“Fuglede-Kadison determinants and sofic entropy”

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

**Michael Wibmer, University of Pennsylvania**

“Groups defined by algebraic difference equations”

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

**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

**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

**Stefan Steinerberger, Yale University **

“Mysterious New Interactions between Analysis and Number Theory”

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

**Bradd Hart, University of McMaster**

"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

**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

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

**Vorrapan Chandee, Burapha University **

“Moments of L-functions”

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

**Ignacio Garcia, Department of Pure Mathematics, University of Waterloo **

“Assouad dimensions of complementary sets”

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

**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

**Ehsaan Hossain, Department of Pure Mathematics, University of Waterloo **

“Polycyclic groups and primitive group rings”

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

**Gregory Chambers, University of Chicago **

“Problems in Quantitative Geometry”

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

**Please note change of time**

**Michael Wan, University of California, Berkeley **

“Towards a model theory of almost complex manifolds”

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

**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

University of Waterloo

200 University Avenue West

Waterloo, Ontario, Canada

N2L 3G1

Departmental office: MC 5304

Phone: 519 888 4567 x43484

Fax: 519 725 0160

Email: puremath@uwaterloo.ca

University of Waterloo

University of Waterloo

43.471468

-80.544205

200 University Avenue West

Waterloo,
ON,
Canada
N2L 3G1

The University of Waterloo acknowledges that much of our work takes place on the traditional territory of the Neutral, Anishinaabeg and Haudenosaunee peoples. Our main campus is situated on the Haldimand Tract, the land granted to the Six Nations that includes six miles on each side of the Grand River. Our active work toward reconciliation takes place across our campuses through research, learning, teaching, and community building, and is centralized within our Office of Indigenous Relations.