# Events - November 2014

Friday, November 28, 2014 — 3:30 PM EST

## Analysis seminar

### Matthew Mazowita, Department of Pure Mathematics, University of Waterloo

#### “Weights and topological centres”

Friday, November 28, 2014 — 2:30 PM EST

## Geometry & Topology seminar

### Steven Gindi, Department of Pure Mathematics, University of Waterloo

#### “Holomorphic Twistor Spaces and Bihermitian Geometry”

Friday, November 28, 2014 — 1:00 PM EST

## Geometry working seminar

### Alan Thompson, Department of Pure Mathematics, University of Waterloo

#### “Yet more separatedness, and an introduction to projective schemes”

Wednesday, November 26, 2014 — 2:30 PM EST

## Algebra seminar

### Alexander Berenbeim, Department of Pure Mathematics, University of Waterloo

#### “What Is Equivalence?: An Introduction to weak ω-groupoids”

Tuesday, November 25, 2014 — 1:00 PM EST

## Geometry working seminar

### Spiro Karigiannis, Pure Mathematics Department, University of Waterloo

#### “Calibrations, Instantons, and Branes: Part II”

Monday, November 24, 2014 — 4:00 PM EST

## Special Colloquium

### Paul Skoufranis, Texas A&M University

#### “Free Probability for Pairs of Faces”

Friday, November 21, 2014 — 4:00 PM EST

## Special colloquium

### Xiaoheng Jerry Wang, Princeton University

#### “Rational points on hyperelliptic curves”

Friday, November 21, 2014 — 2:30 PM EST

## Analysis seminar

### Jingbo Xia, SUNY Buffalo

#### “Hankel operators in Lorentz ideals”

Friday, November 21, 2014 — 2:30 PM EST

## Geometry & Topology seminar

### Savdeep Sethi, University of Chicago

#### “Triples, Instantons and Domain Walls”

Friday, November 21, 2014 — 1:00 PM EST

## Geometry working seminar

### Robert Garbary, Department of Pure Mathematics, University of Waterloo

#### “Separated and Proper Maps”

Thursday, November 20, 2014 — 4:30 PM EST

## Student colloquium

### Boyu Li, Department of Pure Mathematics, University of Waterloo

#### “Asymptotic Distributions of Noncrossing Partitions”

Thursday, November 20, 2014 — 1:30 PM EST

## Number Theory seminar

### Lassina Dembele, University of Warwick

#### “Supercuspidal types and the Jacquet-Langlands correspondence for GL2”

Wednesday, November 19, 2014 — 4:00 PM EST

## Special presentation

### David Savitt, University of Arizona

#### "Galois Representations"

Wednesday, November 19, 2014 — 1:30 PM EST

## Algebra learning seminar

### Phillip Xiao, Department of Pure Mathematics, University of Waterloo

We’ve seen the definition of K1 and a six term exact sequence, but we still have no intuition for what they are and how to compute them. This talk will be devoted to filling that gap by showing you some examples.

Tuesday, November 18, 2014 — 3:30 PM EST

## Computability learning seminar

### Sam Eisenstat, Department of Pure Mathematics, University of Waterloo

#### “Computable Model Theory of Torsion-Free Abelian Groups”

Tuesday, November 18, 2014 — 1:00 PM EST

## Tuesday Geometry Working seminar

### Jon Herman, Pure Mathematics, University of Waterloo

#### “Geometric Interpretations of Curvature”

Monday, November 17, 2014 — 4:00 PM EST

## Special presentation

### Matthew Kennedy, Carleton University

#### "Operator algebras and analytic group theory"

Friday, November 14, 2014 — 3:30 PM EST

## Analysis seminar

### Nicola Watson, University of Toronto

#### "Classification, Covering Dimension and Lifting Properties"

Whilst classification results may not, on the surface, appear too
interesting, the classification program for nuclear C*-algebras has
raised numerous thought-provoking questions and led to the development of many useful, structural tools that have applications outside of the
program. In this talk, we shall discuss why this is, and give a number of

Friday, November 14, 2014 — 2:30 PM EST

## Geometry and Topology seminar

### Lorenzo Foscolo, Stony Brook University

#### "Moduli spaces of monopoles and gravitational instantons"

Friday, November 14, 2014 — 1:30 PM EST

## Geometry working seminar

### Ty Ghaswala, Department of Pure Mathematics, University of Waterloo

#### “Schemes of the Separated Variety”

Thursday, November 13, 2014 — 3:30 PM EST

## Special presentation

### Peter Sarnak, Princeton University

#### “Randomness in geometry - the topology of random real hypersurfaces and percolation”

Wednesday, November 12, 2014 — 4:00 PM EST

## Pure Mathematics special colloquium

### Patrick Ingram, University of Colorado

#### "The arithmetic of postcritically finite maps"

Wednesday, November 12, 2014 — 1:30 PM EST

## Algebra learning seminar

### Ty Ghaswala, Pure Mathematics, University of Waterloo

#### "Grothendieck, Whitehead and a reasonably short exact sequence"

For an ideal $I \triangleleft R$, we will define the relative $K$-groups $K_0(R,I)$, $K_1(R,I)$ and talk about the (not long, not short, but just right) exact sequence.  This sequence will provide us with a useful tool for computing $K$-groups.

Wednesday, November 12, 2014 — 11:30 AM EST

## K-Theory for C* Algebras and Vector Bundles seminar

### Philip Xiao, Pure Mathematics, University of Waterloo

#### "K-theory of C*-algebras and of topological spaces -- Part II"

We will continue and finish the proof that $K^0 (X) \cong K_0 (C(X))$
for $X$ a compact Hausdorff space. We'll see some simple examples, but
computing the $K_0$ (or $K^0$) can be difficult in general. In hope to
aid computation, we'll take a look at the functoriality of $K_0$ and

Tuesday, November 11, 2014 — 4:00 PM EST

## Pure Mathematics special colloquium

### Jack Huizenga, University of Illinois at Chicago

#### "Interpolation problems in algebraic geometry"

Classical Lagrangian interpolation states that one can always prescribe
$n+1$ values of a single variable polynomial of degree $n$. This result
paves the way for many beautiful generalizations in algebraic geometry.
I will discuss a few of these generalizations and their relevance to

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