## Visiting address

Niels Henrik Abels husMoltke Moes vei 35 (map)

0851 OSLO

Norway

Time:
Nov. 13, 2020 2:15 PM–3:00 PM

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

Time:
Oct. 23, 2020 2:15 PM–3:00 PM

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

Time:
Oct. 9, 2020 2:15 PM–3:00 PM

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

Time:
Oct. 2, 2020 2:15 PM–3:00 PM

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

Time and place:
Mar. 11, 2020 11:00 AM–12:00 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 PM–3:15 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 PM–4:00 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 PM–3:15 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 PM–3:15 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 PM–3:15 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 AM–12:00 PM,
NHA 723

Andrey Mudrov (University of Leicester, United Kingdom) will give a talk titled: Pseudo-parabolic categories over **H***P _{q}^{n}*

Time and place:
May 23, 2019 2:15 PM–4:00 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 AM–12:00 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 AM–12:00 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 AM–12:00 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 AM–12:00 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 AM–11:00 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 AM–12:00 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 PM–1:30 PM,
Room 723, NH Abels Hus

An abstract of the talk is available here.

Time and place:
Nov. 28, 2018 11:00 AM–12:00 PM,
NHA Room 108

Time and place:
Nov. 28, 2018 10:00 AM–11:00 AM,
NHA 108

Time and place:
Nov. 26, 2018 2:00 PM–3:00 PM,
NHA 723

Time and place:
Oct. 31, 2018 11:00 AM–12:00 PM,
NHA Room 108

Time and place:
Sep. 19, 2018 11:15 AM–12:00 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 AM–11:00 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.)