## 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

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

Thursday, November 17, 2016 — 12:30 PM EST

**Nickolas Rollick, Department of Pure Mathematics, University of Waterloo **

“The grand scheme of things”

Wednesday, November 16, 2016 — 4:30 PM EST

**Kanstantsin Pashkovich, Combinatorics & Optimization, University of Waterloo**

"Four Dimensional Polytopes of Minimum Positive Semidefinite Rank"

For a given polytope the smallest size of a semidefinite extended

formulation can be bounded from below by the dimension of the polytope

plus one. This talk is about polytopes for which this bound is tight,

i.e. polytopes with positive semidefinite (psd) rank equal to their

dimension plus one.

Wednesday, November 16, 2016 — 4:00 PM EST

**Aaron Tikuisis, University of Aberdeen **

“C*-algebras: quasidiagonality and amenability”

Wednesday, November 16, 2016 — 1:00 PM EST

**Christopher Hawthorne, Department of Pure Mathematics, University of Waterloo **

“Continuous model theory IV”

We begin section 5 of Model theory for metric structures; we present ultraproducts and, time permitting, compactness.

MC 5403

Tuesday, November 15, 2016 — 3:30 PM EST

**Jonathan Stephenson, Department of Pure Mathematics, University of Waterloo **

“The Adjacency Relation”

We will show that the adjacency relation is structurally complete in linear orders, by expressing rice relations in terms of universal sentences over it.

MC 5417

Tuesday, November 15, 2016 — 11:00 AM EST

**Charles W. Clark, National Institute of Standards and Technology **

“Twisting the neutron wavefunction”

Friday, November 11, 2016 — 4:00 PM EST

**Lorenzo Foscolo, Stony Brook University **

“New Einstein metrics on the 6-sphere and the product of two 3-spheres, nearly K ̈ahler 6-manifolds and G2 cones”

Friday, November 11, 2016 — 3:10 PM EST

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

“Polycyclic groups”

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.