For more information about this program please contact George
Elliott

### Ontario Non-Commutative Geometry and Operator Algebras Seminars --

July 2005 - June 2006

Seminars are held every Tuesday and Thursday at Fields 2:00 p.m.

June 29, 2006

**Zhuang Niu**

*Will give a talk on his recent work*

June 27, 2006

**Devang Odedra**

*Will give a talk on his recent work*

June 22, 2006

**Ana Savu**

*Will talk on her most recent work*

June 20, 2006

**Nadish De Silva**

*Will give a talk on his recent work*

June 15, 2006

**Leonel Robert**

*Will give a talk on his recent work*

June 13, 2006

Working Seminar

June 6, 2006

**Efren Ruiz**

*Will give a talk on his recent work *

May 25, 2006

**Efren Ruiz**

*Will give a talk on his recent work *

May 23, 2006

**Kris Coward**

*Will give a talk on his most recent work*

May 18, 2006

**Ping Wong Ng**

*Will give a talk on his most recent work*

May 16, 2006

**Alin Ciuperca**

*Will give a talk on his most recent work*

May 11, 2006

**Luis Santiago**

*Will give a talk on his most recent work*

May 9, 2006

**Greg Malone**

*Will give a talk on his most recent work*

April 27, 2006

**Gunnar Restorff**

*Will give a talk on his most recent work*

April 25, 2006

**Alin Ciuperca**

*Will give a talk on his most recent work*

April 20, 2006

**Toan Ho Minh**

*Will give a talk on his recent work*

April 18, 2006

**Giovanni Landi**, University of Trieste.

Noncommutative instantons and twisted conformal symmetries

I report on recent work on deformation of spaces, in particular
spheres, and deformation of vector bundles which are relevant in physics,
notably monopole and instanton bundles.A first class of examples consists
of toric noncommutative manifolds which were introduced out of cycles
in homology. These examples have non-trivial global features and can
be endowed with the srtucture of noncommutative manifold, defined in
terms of Connes spectral triple. In particular,

noncommutative spheres are isospectral deformations of usual spherical
geometries. Instanton bundles and Yang-Mills duality equations can be
introduced and a geometric analysis paralleling the one on commutative
spaces can be performed. Twisted conformal symmetries are used to generate
instanton solutions (i.e. solutions of the duality equations); these
are absolute minima of the Yang-Mills functionals.A second class of
examples is made of spaces coming from quantum groups, some of which
can again be endowed with a spectral triple. Also one can construct
generalizations of instanton bundles.

April 13, 2006

**Greg Malony**

*Will give a talk on his most recent work*

April 6, 2006

**Zhuang Niu**

*Will give a talk on his most recent work*

April 4, 2006

**Zhuang Niu**

*Will give a talk on his most recent work*

March 30, 2006

**Kris Coward**

*Will give a talk on his most recent work*

March 28, 2006

**Alin Ciuperca**

*Will give a talk on his most recent work*

March 21 & 23, 2006

**Christopher Phillips**, University of Oregon

Abstract:

The interesting actions of the finite groups on the rotation algebra
are those of Z mod2, Z mod 3, Z mod 4, and Z mod 6. For example the
action of Z mod 4 is generated by the "noncommutative Fourier transform",
the automorphism determined by the assignments of U to V and of V to
U*. We prove that for the irrational rotation algebra, the cross product
by any of these four actions is an AF-algebra. This has been known for
some time for the action of Z mod 2, and Z mod 4, but the other cases
are new. The proofs combine a variety of methods. In particular, they
use the fact that the actions in question have the tracial Rokhlin property,
Lin's classification result for simple separable C*-algebras with tracial
rank zero and satisfying the Universal Coefficient Theorem and the Baum-Connes
conjecture for countable amenable groups.

March 16, 2006

**Kris Coward**

*Will give a talk on his most recent work*

March 14, 2006

**Luis Santiago**

*Will give a talk on his most recent work*

March 9, 2006

**Leonel Robert **

*Will give a talk on his most recent work*

and

**Andriy Z**, Nipissing University

*Spectra of Algebras of Entire Functions on Banach spaces*

An entire function on a Banach space is said to be a function of
bounded type if it is bounded on bounded subsets. We will consider the
spectrum (set of maximal ideals) of the algebra of bounded analytic
functions on a Banach space and describe a natural linear structure
of the spectrum.

March 7, 2006

**Zhuang Niu**

* Will give a talk on his most recent work*

March 2, 2006

**Leonel Robert **

*Will give a talk on his most recent work*

February 28, 2006

**Efren Ruiz**

*Will give a talk on his recent work*

February 23, 2006

**Alin Ciuperca**

*Will give a talk on his most recent work*

February 21, 2006

**Zhuang Niu**

* Will give a talk on his most recent work*

February 16, 2006

**Toan Ho Minh**

*Will give a talk on his most recent work*

February 14, 2006

**Gunnar Restorff**

*Will give a talk on his most recent work*

February 9, 2006

**John Roe**, Penn State University

*Amenability and topology. *

In attempting to generalize the analysis of yesterday talk from
Z to other groups, one encounters the amenability property that G. Yu
calls "property A". This property has significant topological
implications. We shall explain how one passes from a representation
theoretic property such as property A to results about the homotopy
invariance of various characteristic numbers and their "secondary"
generalizations.

February 7, 2006

**Alin Ciuperca**

*Will give a talk on his most recent work*

February 2, 2006

**Gunnar Restorff**

*Will give a talk on his most recent work*

January 31, 2006

**Ping Wong Ng**

Will give a talk on his most recent work

January 24, 2006

**Zhuang Niu**

*Will give a talk on his most recent work*

January 19, 2006

**Kris Coward**

*Will give a talk on his most recent work*

January 17, 2006

**Gunnar Restorff**

*Will give a talk on his most recent work*

January 12, 2006

**Leonel Robert **

*Will give a talk on his most recent work*

January 10, 2006

**Leonel Robert **

*Will give a talk on his most recent work*

January 5, 2006

**Alin Ciuperca**

*Will give a talk on his most recent work*

December 22, 2005

**Zhuang Niu**

*Will give a talk on his most recent work*

December 20, 2005

**Leonel Robert **

*Will give a talk on his most recent work*

December 15, 2005

**Zhuang Niu**

*Will give a talk on his most recent work*

December 13, 2005

**Alin Ciuperca**

*Will give a talk on his most recent work*

December 8, 2005

**Kris Coward**

*Will give a talk on his most recent work*

December 6, 2005

**Greg Maloney**

*Will give a talk on his most recent work*

December 1, 2005

**Alin Ciuperca**

*Will give a talk on his most recent work*

November 29, 2005

**Alin Ciuperca**

*Will give a talk on his most recent work*

November 24, 2005

**Gunnar Restorff**

*Will give a talk on his most recent work*

November 22, 2005

**Leonel Robert **

*Will give a talk on his most recent work*

November 17, 20**05**

Toan Ho Minh

*Will give a talk on his most recent work*

November 15, 2005

**Alin Ciuperca**

*Will give a talk on his most recent work*

November 10, 2005

**Kris Coward**

*Will give a talk on his most recent work*

November 8, 2005

**Leonel Robert **

*Will give a talk on his most recent work*

November 3, 2005

**Gunnar Restorff**

*Will give a talk on his most recent work*

November 1, 2005

**Zhuang Niu**

*Will give a talk on his most recent work*

October 27, 2005

**Toan Ho Minh**

*Will give a talk on his most recent work*

October 25, 2005

**Toan Ho Minh**

*Will give a talk on his most recent work*

October 20, 2005

**Michael Bailey**

*Will give a talk on his recent work *

October 18, 2005

**Efren Ruiz**

*Will give a talk on his recent work *

October 13, 2005

**Alin Ciuperca**

*Will give a talk on his most recent work*

October 11, 2005

**Leonel Robert **

*Will give a talk on his most recent work*

October 6, 2005

**Toan Ho Minh**

*Will give a talk on his most recent work*

October 4, 2005

Working Seminar

September 29, 2005

**Gunnar Restorff**

*Will give a talk on his most recent work*

September 27, 2005

**Leonel Robert **

*Will give a talk on his most recent work*

September 22, 2005

**Toan Ho Minh**

*Will give a talk on his most recent work*

September 20, 2005

**Greg Malone**

*Will give a talk on his most recent work*

September 15, 2005

Working Seminar

September 13, 2005

**Greg Malone**

*Will give a talk on his most recent work*

Toan Ho Minh

*Will give a talk on his most recent work*

September 8, 2005

**Gunnar Restorff**

*Will give a talk on his most recent work*

September 6, 2005

**Efren Ruiz**

*Will give a talk on his most recent work*

Aug. 30, 2005

Working Seminar

August 25, 2005

Working Seminar

August 23, 2005

**Toan Ho Minh**

*Will give a talk on his most recent work*

August 18, 2005

**Gunnar Restorff**

*Will give a talk on his most recent work*

August 16, 2005

**Kris Coward**

*will talk on his most recent work*

August 11, 2005

Working Seminar

August 9, 2005

**Dr. Efren Ruiz**

*will talk on his most recent work*

Aug. 4, 2005,

**Dr. Ana Maria Savu**

*will talk on her most recent work*

Aug. 2, 2005

**Leonel Robert **

*will talk on his most recent work*

July 28, 2005

**Toan Ho Minh**

*will talk on his most recent work *

July 26, 2005

**Michael Baiey**

*will talk on his most recent work*** **

July 5, 2005

**Toan Ho Minh**

*will talk on his most recent work *

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