# Guest lectures and seminars

## Upcoming

Time and place: Oct. 23, 2017 12:45 PM - 1:45 PM, Gates of Eden

Erik Bedos (UiO) will give a talk with title "On Exel-Pardo algebras as Cuntz-Pimsner algebras"

Abstract:

In a joint work with S. Kaliszweski and J. Quigg (https://arxiv.org/pdf/1512.07302.pdf, to appear in JOT), we consider a continuous action of a locally compact group G on a topological graph E, equipped with a G-valued continuous cocycle, and show how to construct a C*-correspondence from these data, giving rise to a Toeplitz algebra and a Cuntz-Pimsner algebra. In the talk we will sketch this construction, but restrict ourselves to the discrete case. We will also describe these algebras in terms of generators and relations when E is row-finite. As a corollary we get that the associated Cuntz-Pimsner algebra coincides with the C*-algebra recently introduced by Exel and Pardo when E is finite and sourceless.

Time and place: Oct. 26, 2017 2:15 PM - 4:00 PM, Ullevål
Time and place: Nov. 8, 2017 12:00 PM - Nov. 9, 2017 1:00 PM,

Welcome to the second FINEWSTOCH Networkshop. The workshop will bring together leading researchers in stochastics and probability theory to discuss recent developments with a particular focus on finance, insurance, energy and weather.

Time: Nov. 24, 2017 11:15 AM - 12:00 PM

Elisabeth Seland

## Previous

Time and place: Oct. 20, 2017 11:15 AM - 12:00 PM, Hurricane

Reyna Ramirez

Time and place: Oct. 19, 2017 2:15 PM - 4:00 PM, Ullevål
Time and place: Oct. 16, 2017 12:45 PM - 1:45 PM, Gates of Eden, Ullevål

Nicolai Stammeier (Oslo) will give a talk with title: The inner structure of boundary quotients of right LCM semigroups

Abstract: In joint work with Roberto Conti, Stefano Rossi, and Valeriano Aiello, we use semidirect products built from algebraic dynamical systems to model right LCM semigroups to study various structural aspects in connection with a selection of distinguished subalgebras of the associated boundary quotients. Our two guiding examples are integral dynamics as considered in work of Barlak - Omland - Stammeier, and exact injective group endomorphisms of discrete abelian groups with finite cokernel as studied by Cuntz and Vershik.

Time and place: Oct. 12, 2017 2:15 PM - 4:00 PM, Ullevål
Time and place: Oct. 11, 2017 1:15 PM - 2:00 PM,

Eric Schaanning (Norges Bank) gives a lecture with the title: Interbank contagion and systemic risk: How robust are estimates?

Time and place: Sep. 27, 2017 2:15 PM - 4:00 PM, B638, NH Abels hus
Time and place: Sep. 21, 2017 2:15 PM - 4:00 PM, B638, NH Abels hus
Time and place: Sep. 19, 2017 12:45 PM - 1:45 PM, Gates of Eden

Adam Sørensen (UiO) will give a talk with title: C*-stable groups.

Abstract: In this talk we will look at when group C*-algebra have stable relations, which loosely speaking means that any almost representation of the group in a C*-algebra will be close to an exact representation. A particularly interesting case is if we assume the C*-algebra is finite dimensional. I will mostly discuss a collection of examples. The talk is based on ongoing joint work with Søren Eilers and Tatiana Shulman.

Time and place: Sep. 15, 2017 11:15 AM - 12:00 PM, Hurricane
Time and place: Sep. 7, 2017 10:15 AM - 12:00 PM, Ole Johan Dahls hus

The seminar takes place in the meeting room, floor 9 of Ole Johan Dahls hus.

The room has been reserved Thursdays 10.15 - 12.00 from August 31 to November 30.

The program is subject to changes.

Time and place: Sep. 6, 2017 1:15 PM - 2:00 PM, Meeting room End of the Line, Ullevål stadion (Sognsveien 77 B, second floor)

Nils Detering (University of California, Santa Barbara) gives a lecture with the title: Managing Default Contagion in Inhomogeneous Financial Networks

Time and place: Aug. 31, 2017 11:00 AM - 3:45 PM,

On the occasion of Professor Sylvia Richardson, University of Cambridge, receiving a Honorary Doctorate from the University of Oslo, we arrange a workshop in her honour. Please join us in the celebration of Sylvia and the statistics community at the University of Oslo, with presentations of some of the ongoing statistical research in the life sciences at our university!

Time and place: Aug. 11, 2017 11:00 AM - 12:00 PM, room 108, Niels Henrik Abels hus

Please access the abstract for detailed information on the contents of this talk.

Time and place: Aug. 7, 2017 - Aug. 11, 2017,

The Abel symposium 2017

Time and place: June 27, 2017 11:00 AM - 12:00 PM, "Desolation Row", 3rd floor, Sognsv. 77

Prof. Lia Vas (University of the Sciences, Philadelphia, USA) will give a talk with title:

Algebraization of Operator Theory

Time and place: June 9, 2017 9:15 AM - 1:00 PM,

Andrey Pilipenko (Institute of Mathematics of Ukrainian National Academy of Sciences) gives a minicourse with the title: Reflected Stochastic Differential Equations.

Time and place: June 8, 2017 2:15 PM - 4:00 PM,

Andrey Pilipenko (Institute of Mathematics of Ukrainian National Academy of Sciences) gives a minicourse with the title: Reflected Stochastic Differential Equations.

Time and place: June 7, 2017 2:15 PM - 4:00 PM,

Andrey Pilipenko (Institute of Mathematics of Ukrainian National Academy of Sciences) gives a minicourse with the title: Reflected Stochastic Differential Equations.

Time and place: June 7, 2017 1:15 PM - 2:00 PM,

Yaozhong Hu (University of Kansas) gives a lecture with the title: Feynman-Kac formula for the stochastic heat equation driven by fractional noise in time with $H\in (0,1/2)$.

Time and place: May 31, 2017 1:15 PM - 3:00 PM,

Yaozhong Hu (University of Kansas) gives a minicourse with the title: Some aspects of stochastic heat equations.

Time: May 30, 2017 2:15 PM

A double seminar will be held in the lunch area, 8th floor Niels Henrik Abels hus at 14:15. We will have talks by Ruth Keogh (Department of Medical Statistics,  London School of Hygiene and Tropical Medicine) and Maximilian Coblenz (Institute of Operations Research, Karlsruhe Institute of Technology).

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