# Events - 2014

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

Tuesday, November 11, 2014 — 3:30 PM EST

## Computability learning seminar

### Mohammad Mahmoud, Department of Pure Mathematics University of Waterloo

#### “Goncharov’s Theorem”

We continue through the proof of Goncharov’s Theorem from Mcpherson’s research paper.

Tuesday, November 11, 2014 — 1:00 PM EST

## Tuesday Geometry Working seminar

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

#### "Intro to Calibrations, Instantons, and Branes"

Tuesday, November 11, 2014 — 10:30 AM EST

## Universal Algebra seminar

### Ross Willard, Pure Mathematics, University of Waterloo

#### "Adding Gaussian elimination to local consistency checking - 5"

In this fifth of several lectures, I continue the analysis of
singular pairs of variables, studying their effect on the congruence
lattice of their associated constraint relation.

Friday, November 7, 2014 — 3:30 PM EST

## Analysis seminar

### James A. Mingo, Queen’s University

#### “Freeness and the Transpose”

Friday, November 7, 2014 — 2:30 PM EST

## Geometry & Topology seminar

### Xiangwen Zhang, Columbia University

#### “ALEXANDROV’S UNIQUENESS THEOREM FOR CONVEX SURFACES”

Friday, November 7, 2014 — 1:00 PM EST

## Geometry working seminar

### Suzanne Findleton, Pure Mathematics, University of Waterloo

#### "Gluing constructions and separated schemes"

In this talk, we explain how one can obtain new schemes by gluing together a collection of schemes. This is known as the "gluing construction", which can produce for example projective n-space over a given ring. We also introduce the notion of a separated scheme and explain its relation to Hausdorffness.

Thursday, November 6, 2014 — 1:30 PM EST

## Number Theory seminar

### David McKinnon, Department of Pure Mathematics, University of Waterloo

#### “Integral points on punctured varieties”

Wednesday, November 5, 2014 — 1:30 PM EST

## Algebra learning seminar

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

#### “Goodbye K0... Hello K1!”

Tuesday, November 4, 2014 — 1:00 PM EST

## Geometry working seminar

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

#### "Totally Geodesic Immersions"

Given an isometric immersion, we will study further how the second
fundamental form allows the geometry in the ambient space to be
decomposed into geometry on the tangent and normal bundles. In
particular, we'll discuss the Gauss-Codazzi equations. In the second
part of the talk, we will look at totally geodesic immersions and some

Tuesday, November 4, 2014 — 10:30 AM EST

## Universal Algebra seminar

### Ross Willard, Department of Pure Mathematics, University of Waterloo

#### “Adding Gaussian elimination to local consistency checking - 4”

Monday, November 3, 2014 — 4:00 PM EST

## Pure Math colloquium

### Benjamin Steinberg, City College of New York

#### "Groupoid algebras and C*-algebras"

Groupoid C*-algebras form a unifying framework for a number of classes of C*-algebras including commutative ones, group C^*-algebras, group action cross products and Cuntz-Krieger, or graph, C*-algebras. Often purely algebraic properties of these algebras can be understood in terms of the groupoids, e.g., simplicity, Morita equivalence, the primitive ideal structure.

Friday, October 31, 2014 — 2:30 PM EDT

## Geometry & Topology seminar

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

#### “Calabi-Yau threefolds fibred by lattice polarized K3 surfaces”

Friday, October 31, 2014 — 1:00 PM EDT

## Geometry working seminar

### Ruxandra Moraru, Department of Pure Mathematics, University of Waterloo

#### “Varieties versus schemes, Part II”

Wednesday, October 29, 2014 — 11:30 PM EDT

## Special presentation

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

#### “K-theory for C*-algebras and vector bundles - Part I”

Wednesday, October 29, 2014 — 3:30 PM EDT

## Logic seminar

### Denis Hirschfeldt, University of Chicago

#### “Computability Theoretic Reduction between Pi12Principles”

Wednesday, October 29, 2014 — 1:30 PM EDT

## Algebra learning seminar

### Mohamed El Alami, Department of Pure Mathematics, University of Waterloo

#### “More K0”

Tuesday, October 28, 2014 — 10:30 AM EDT

## Universal Algebra Seminar

### Ross Willard, Department of Pure Mathematics, University of Waterloo

#### “Adding Gaussian elimination to local consistency checking”

Monday, October 27, 2014 — 4:00 PM EDT

## Pure Math colloquium

### Denis Hirschfeldt, University of Chicago

#### "Computable Mathematics and Reverse Mathematics"

Friday, October 24, 2014 — 3:30 PM EDT

## Analysis seminar

### Matthew Wiersma, Pure Mathematics, University of Waterloo

#### "Intermediate $C^*$-norms"

Friday, October 24, 2014 — 2:30 PM EDT

## Pages

### February 2014

S M T W T F S
26
27
28
29
30
31
1
2
8
9
15
16
17
21
22
23
24
1
1. 2020 (22)
1. January (22)
2. 2019 (199)
1. December (7)
2. November (26)
3. October (19)
4. September (13)
5. August (7)
6. July (12)
7. June (18)
8. May (22)
9. April (11)
10. March (25)
11. February (17)
12. January (22)
3. 2018 (219)
4. 2017 (281)
5. 2016 (335)
6. 2015 (209)
7. 2014 (235)
1. December (5)
2. November (36)
3. October (34)
4. September (17)
5. August (7)
6. July (17)
7. June (23)
8. May (22)
9. April (13)
10. March (17)
11. February (22)
12. January (22)
8. 2013 (251)
9. 2012 (135)