- April 12, 14:15-16:00 in 656: N. Christopher Phillips (University of Oregon) “Strict comparison for crossed products by free minimal actions of Z^d”.
- Abstract: Let X be a compact manifold,and let h be a smooth free minimal action of Z^d on X. Then C*(Z^d,X,h) has strict comparison of positive elements. That is,the order on the Cuntz semigroup is essentially determined by the dimension functions coming from traces. It follows that the order on projections over C*(Z^d,X,h) is determined by traces in the sense of Blackadar. We will describe, in particular,the construction of a “large” subalgebra of the crossed product, which plays a role similar to that of the Putnam subalgebra of C*(Z,X,h)_y for a minimal homeomorphism h of a compact metric space X and a point y in X.
The operator algebra group at NTNU
The operator algebra group at NTNU is an informal group of people at NTNU working in the field of operator algebra. It currently consists of the following people:
We are participating in the NordForsk supported research network Operator Algebra and Dynamics and in the NFR-project Operator Algebras. This is a joint project with participants from NTNU, Oslo University College and the University of Oslo.
In connection with these projects, we have hosted the following events:
- Joint Oslo-Trondheim Operator Algebra Seminar (May 2011).
Recent Ph.D. courses given by the operator algebra group:
- C*-crossed products (spring 2010).
- K-theory for C*-algebras (fall 2009).
If you are interested in writing a project or master's thesis in operator algebra, then you can take a look at this list of projects (in Norwegian).
The operator algebra seminar
Upcoming talks
More information about the seminar including a list of previous talks and the seminar's calendar.
Current and upcoming visitors of the operator algebra group
- N. Christopher Phillips, University of Oregon (9-14 April 2012).