John Quigg (ASU): Duality theory for C*-crossed products, part I


This lecture is the first of a mini-course consisting of five lectures given by Professor John Quigg (Arizona State University, Tempe, USA), one of the world leading experts on the topic of C*-dynamical systems.

This course is a part of the project "Pure Mathematics in Norway, 2018-2022", supported by the Trond Mohn Foundation (earlier called the Bergen Research Foundation) and the Tromsø Research Foundation.  

Image may contain: Forehead, Chin, Glasses.

John Quigg

The next lectures will be given on June 7, June 11, June 13 and June 14 from 10.15 to 12.00 in the same room. 

Abstract of the course:

The aim of the mini-course is to give an introduction to actions and coactions of locally compact groups on C*-algebras and their associated C*-crossed products, with emphasis on duality aspects (including the duality theorems of Takesaki-Takai, Imai-Takai, Katayama, and Landstad). It will also include a brief outline of how this theory is being applied to shed light on recent attempts to «fix» the Baum-Connes conjecture, using «exotic» crossed products.


The target group is master- and PhD-students in Norway with a basic knowledge of the fundamental aspects of C*-algebras, but anyone interested in the topic of the lectures is welcome to participate. No pre-registration is necessary, and no financial support is available from the organizers. 

Here are the notes for the course.


Contact person: Erik Bédos (UiO).



The group in operator algebras at UiO.
Published May 5, 2019 12:31 PM - Last modified Aug. 6, 2020 12:39 PM