Forskningsarrangementer

Kommende

Tid og sted: 20. okt. 2017 11:15 - 12:00, Hurricane

Reyna Ramirez

Tid og sted: 23. okt. 2017 12:45 - 13:45, 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.  
 
Tid og sted: 8. nov. 2017 12:00 - 9. nov. 2017 13:00, Seminar room: "Gates of Eden", Matematisk Institutt, 2nd Floor, Sognsveien 77B, Ullevål Stadion

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. 

Tid: 24. nov. 2017 11:15 - 12:00

Elisabeth Seland

Tidligere

Tid og sted: 16. okt. 2017 12:45 - 13:45, 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.

Tid og sted: 11. okt. 2017 13:15 - 14:00, Seminar room: "Hurricane", Matematisk Institutt, Ullevål stadion (Sognsveien 77 B, 2nd floor)

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

Tid og sted: 19. sep. 2017 12:45 - 13:45, 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.  

Tid og sted: 15. sep. 2017 11:15 - 12:00, Hurricane
Tid og sted: 7. sep. 2017 10:15 - 12:00, 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.

Tid og sted: 6. sep. 2017 13:15 - 14:00, 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

Tid og sted: 31. aug. 2017 11:00 - 15:45, Runde Auditorium, Domus Medica, UiO

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!

Tid og sted: 11. aug. 2017 11:00 - 12:00, room 108, Niels Henrik Abels hus

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

Tid og sted: 7. aug. 2017 - 11. aug. 2017, Svolvær, Lofoten

The Abel symposium 2017

Tid og sted: 27. juni 2017 11:00 - 12:00, "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

 

Tid og sted: 14. juni 2017 10:15 - 15:30, VB Aud 4 (Aud 5 fra kl. 13.30)

Den 14. juni 2017 er det 100 år siden Atle Selberg ble født. Han regnes som en av de fremste tallteoretikerne i verden gjennom tidene og mottok bl.a. Fieldsmedaljen i 1950 og Wolfprisen i 1986. Han hadde hele sin studietid ved UiO, der han tok doktorgraden i 1942.  

Matematisk Institutt ved UiO vil markere jubileet på selve dagen den 14. juni.

Tid og sted: 14. juni 2017 10:15 - 15:30, VB Aud 4 (Aud 5 fra kl. 13.30)

Den 14. juni 2017 er det 100 år siden Atle Selberg ble født. Han regnes som en av de fremste tallteoretikerne i verden gjennom tidene og mottok bl.a. Fieldsmedaljen i 1950 og Wolfprisen i 1986. Han hadde hele sin studietid ved UiO, der han tok doktorgraden i 1942.  

Matematisk Institutt ved UiO vil markere jubileet på selve dagen den 14. juni.

Tid og sted: 9. juni 2017 09:15 - 13:00, Niels Henrik Abels hus, room 126

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

Tid og sted: 8. juni 2017 14:15 - 16:00, Niels Henrik Abels hus, room 126

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

Tid og sted: 7. juni 2017 14:15 - 16:00, Niels Henrik Abels hus, room 126

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

Tid og sted: 7. juni 2017 13:15 - 14:00, Niels Henrik Abels hus, room 1036

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 $H\in (0,1/2)$.

Tid og sted: 31. mai 2017 13:15 - 15:00, Niels Henrik Abels hus, room 107

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

Tid: 30. mai 2017 14:15

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). 

Tid og sted: 29. mai 2017 13:15 - 15:00, Niels Henrik Abels hus, room 107

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

Tid og sted: 18. mai 2017 14:30 - 15:30, Rest area 7. floor

Abstract: I will discuss the two main syntheses that occured duing the "wavelet revolution" in the second half of the 1980s: one concerning the many aspects of what we now call wavelets, another concerning the relations between conjugate mirror filters, multiresolution approximations and orthonormal wavelet bases.

Coffee/tea and cookies will be served from 14.00 to 14.30.

Tid og sted: 12. mai 2017 12:15 - 14:00, NH Abel's hus, room U26

This is the second of two lectures by Anders Hansen (Cambridge Univ. and UiO) on  Foundational Computational Problems in l^1 and Total Variation Regularisation.