C*-algebra seminar

Upcoming

Time: Oct. 23, 2020 2:15 PM3:00 PM

C*-algebra seminar talk by Olof Giselsson (University of Oslo)

Time: Nov. 13, 2020 2:15 PM3:00 PM

C*-algebra seminar talk by Eduardo Scarparo (NTNU)

Previous

Time: Oct. 9, 2020 2:15 PM3:00 PM

C*-algebra seminar talk by Ulrik Enstad (University of Oslo)

Time: Oct. 2, 2020 2:15 PM3:00 PM

C*-algebra seminar talk by Ole Brevig (University of Oslo)

Time and place: Mar. 11, 2020 11:00 AM12:00 PM, NHA 108

Roberto Conti (Sapienza University of Rome, Italy) will give a seminar  talk on 

              Connes isometries of the Cuntz algebras

Time and place: Dec. 2, 2019 2:15 PM3:15 PM, NHA 108

Zahra Afsar (The University of Sydney, Australia) will give a talk titled: C*-algebras of self-similar actions of groupoids on higher-rank graphs and their equilibrium states

Time and place: Nov. 20, 2019 2:15 PM4:00 PM, NHA 108

Erik Habbestad (UiO): Asymptotic representation theory of the infinite quantum symmetric group

Floris Elzinga (UiO): Free Monotone Transport for q-Gaussians

Time and place: Oct. 2, 2019 2:15 PM3:15 PM, NHA 720

Nathan Brownlowe (The University of Sydney, Australia) will give a talk titled: Reconstructing directed graphs from their Toeplitz algebras.

Time and place: Sep. 4, 2019 2:15 PM3:15 PM, NHA 723

Kenny De Commer (Vrije Universiteit Brussel, Belgium) will give a talk titled: Spectral *-algebras and quantum group actions

Time and place: Aug. 21, 2019 2:15 PM3:15 PM, NHA 107

Petter Nyland (NTNU) will give a talk titled: Matui’s Conjectures for Étale Groupoids.

Time and place: May 29, 2019 11:00 AM12:00 PM, NHA 723

Andrey Mudrov (University of Leicester, United Kingdom) will give a talk titled: Pseudo-parabolic categories over HPqn

Time and place: May 23, 2019 2:15 PM4:00 PM, NHA 723

Franz Fuchs (SINTEF) will give a talk with title: 

Quantum Computing and Quantum Supremacy

Time and place: May 15, 2019 11:00 AM12:00 PM, NHA 723

Ulrik Enstad (University of Oslo) will give a talk titled: Heisenberg modules and the existence (or lack thereof) of Gabor frames

Time and place: May 8, 2019 11:00 AM12:00 PM, NHA 108

Seung-Hyeok Kye (Seoul National University, Korea) will give a talk titled: Indecomposable exposed multi-linear maps and separable states with unique decomposition.

Time and place: Apr. 24, 2019 11:00 AM12:00 PM, NHA 723

Roberto Conti (Sapienza University of Rome, Italy) will give a talk titled: Endomorphisms of simple C*-algebras generated by isometries.

Time and place: Mar. 27, 2019 11:00 AM12:00 PM, NHA 723

Sanaz Pooya (Stockholm), Sweden, will give a talk titled: On the Baum–Connes assembly map for certain semi-direct products.

Time and place: Mar. 27, 2019 10:00 AM11:00 AM, NHA 723

Sven Raum (Stockholm), Sweden, will give a talk with title: C*-superrigidity of 2-step nilpotent groups

Time and place: Feb. 13, 2019 11:00 AM12:00 PM, B723

Camila Fabre Sehnem (Florianopolis), Brasil, will give a talk with title :

On $C^*$-algebras associated to product systems

 

 

Time and place: Dec. 12, 2018 12:30 PM1:30 PM, Room 723, NH Abels Hus

An abstract of the talk is available here.

Time and place: Nov. 28, 2018 11:00 AM12:00 PM, NHA Room 108
Time and place: Nov. 28, 2018 10:00 AM11:00 AM, NHA 108
Time and place: Nov. 26, 2018 2:00 PM3:00 PM, NHA 723
Time and place: Oct. 31, 2018 11:00 AM12:00 PM, NHA Room 108
Time and place: Sep. 19, 2018 11:15 AM12:00 PM, NHA 108

Prof. Masaki Izumi, Kyoto University, Japan, will give a talk with title:

The classification of poly-Z group actions on Kirchberg algebras

Abstract: We completely classify outer actions of a poly-Z group G on any Kirchberg algebra A in terms of a principal Aut(A x K)-bundle over the classifying space BG. This is joint work with Hiroki Matui.

 

 

Time and place: Sep. 19, 2018 10:15 AM11:00 AM, NHA 108

Becky Armstrong, University of Sydney, Australia, will give a talk with title:

Simple graph algebras

Abstract: Since their introduction twenty years ago, C*-algebras associated to directed graphs have become a popular tool for investigating various classes of C*-algebras, because analytical properties of these C*-algebras depend on much simpler combinatorial properties of the underlying graphs. One such analytical property is simplicity, which plays a fundamental role in the classification program for C*-algebras. In this talk I will first recall the characterisation of simplicity for directed graph C*-algebras. I will then describe the results of my PhD research, in which I characterise simplicity of twisted C*-algebras of topological higher-rank graphs in terms of the underlying graphical and cohomological data. These C*-algebras are constructed using groupoid techniques for the purpose of this simplicity characterisation, but I will also briefly describe two product-system models for twisted C*-algebras of topological higher-rank graphs. (This is joint work with my PhD supervisors, Nathan Brownlowe and Aidan Sims.)