# Gjesteforelesninger, seminarer og konferanser

## Kommende

Tid og sted: 4. mar. 2015 14:15 - 16:00, NHA B735

Bartosz K. Kwaśniewski (University of Southern Denmark, Odense) will talk on: Topological aperiodicity for product systems of C*-correspondences

Abstract:We introduce a semigroup of multivalued maps dual to a product system of $C^*$-correspondences over an Ore semigroup. Under a certain aperiodicity condition on the dual semigroup we obtain a uniqueness theorem and a simplicity criterion for the associated Cuntz-Pimsner algebra. These results generalize similar statements for crossed products by groups (R. J. Archbold, J. S. Spielberg) and Exel’s crossed products (R. Exel, A. Vershik). They also give interesting conditions for topological higher rank graphs, and apply to the new Cuntz $C^*$-algebra $\mathcal{Q}_\mathbb{N}$ arising from the `$ax+b$'-semigroup over natural numbers. (Based on joint work with Wojciech Szymański.)

Tid og sted: 5. mar. 2015 14:15 - 16:00, B62, NH Abels hus

Johannes Kleppe, Høskolen i Buskerud og Vestfold, gives the Seminar in Algebra and Algebraic Geometry:

Modular curves II

Tid: 10. mar. 2015 14:15

John Dagsvik ( Statistics Norway ) gives a seminar in room 107, 1st floor N.H. Abels House at 14:15 March 10th:  How Does the Temperature Vary over Time?  Evidence on the Stationary and Fractal  Nature of Temperature Fluctuations

Tid: 17. mar. 2015 14:15

Olav Breivik (Dept. of Math., UiO ) gives a seminar in room 107, 1st floor N.H. Abels House at 14:15 March 17th:  Bycatch of juvenile cod in the Barents Sea shrimp fishery

Tid og sted: 23. mar. 2015 12:15 - 14:00, VB, Auditorium 2
These are the first two of six 45-min. lectures given by Anders Hansen (Cambridge Univ. and UiO) on Compressed sensing - Theory and Applications.
Tid og sted: 24. mar. 2015 12:15 - 23. mar. 2015 14:00, VB, Auditorium 2

These are the third and fourth lectures given by Anders Hansen (Cambridge Univ. and UiO) on Compressed sensing - Theory and Applications.

Tid og sted: 25. mar. 2015 14:15 - 23. mar. 2015 16:00, VB, Auditorium 2

These are the fifth and and the sixth lectures given by Anders Hansen (Cambridge Univ. and UiO) on Compressed sensing - Theory and Applications.

Tid og sted: 20. apr. 2015 - 24. apr. 2015,

Welcome to the SECOND conference on Stochastics of Environmental and Financial Economics. The conference will bring together leading researchers in the fields of stochastic analysis and finance to discuss recent developments and challenges with an edge towards energy, environmental and financial markets.

The conference is also a celebration of professor Bernt Øksendal's 70th anniversary. On Thursday April 23 the program of the conference will mark this big event with a selected list of speakers.

The conference is organized by the Center of Advanced Studies (CAS), Stochastics of Environmental and Financial Economics. Scientific organizers: Fred Espen Benth and Giulia Di Nunno (UiO)

Tid og sted: 21. mai. 2015 - 22. mai. 2015,
Tid og sted: 23. mai. 2015 - 24. mai. 2015,

Fourteenth International Workshop

Tid og sted: 29. mai. 2015 - 30. mai. 2015,

The statistics groups at the University of Oslo and the Norwegian University of Life Sciences invite all PhD-students and postdocs within statistics in the OIslo-region as well as their teachers and supervisors to a  2-days workshop.

Tid og sted: 7. aug. 2015 20:00 - 11. aug. 2015 06:45, Coastal Express (Hurtigruten), Norway

Please note that participation is by invitation only. Note also that there is an official homepage of the Abel Symposium 2015.

## Tidligere

Tid og sted: 26. feb. 2015 14:15 - 16:00, B62, NH Abels hus

Geir Ellingsrud, UiO, gives the Seminar in Algebra and Algebraic Geometry:

Modular curves I

Tid og sted: 25. feb. 2015 14:15 - 16:00, NHA B71

Adam P.W. Sørensen will talk on Nuclear dimension of UCT Kirchberg algebras

Abstract: Nuclear Dimension is a regularity property for C*-algebras that is based on the type of properties currently being taught in Topics in Operator Algebras. We will go over the definition and motivation and discuss known results.

Tid: 24. feb. 2015 14:15

Kasper Christensen ( Nofima, Ås and  Aarhus university ) gives a seminar in room 107, 1st floor N.H. Abels House at 14:15 February 24th:  Mining for new product ideas.

Tid og sted: 18. feb. 2015 14:15 - 15:15, NHA B735
Tid og sted: 12. feb. 2015 14:15 - 16:00, B62, NH Abels hus

Atanas Iliev, Seoul National University, gives the Seminar in Algebra and Algebraic Geometry:

Fano manifolds - old and new

Tid og sted: 12. feb. 2015 10:15 - 12:00, 9th floor, OJH(Comp Sc.)

Program for the seminar in Mathematical Logic spring 2015

Tid og sted: 11. feb. 2015 14:15 - 16:00, NHA B735

Makoto Yamashita, Ochanomizu University, will give a talk with title: Drinfeld center and representation theory for monoidal categories

Abstract: Motivated by the recently found relation between central completely positive multipliers and the spherical unitary representations of the Drinfeld double for discrete quantum groups, we construct and analyze the representations of fusion algebra of rigid C*-tensor category from the unitary half-braidings. Through the correspondence of Drinfeld center and the generalized Longo-Rehren construction in subfactor theory, these representations are also related to Popa’s theory of correspondences and subfactors. This talk is based on joint work with Sergey Neshveyev.

Tid og sted: 10. feb. 2015 14:15, Room 107, 1st floor N.H. Abels House

Håvard Rue ( Dept. of math., NTNU) gives a seminar in room 107, 1st floor N.H. Abels House at 14:15 February 10th: Penalising model component complexity: A principled practical approach to constructing priors

Tid og sted: 5. feb. 2015 13:00 - 15:00, Undervisningsrom 126 Niels Henrik Abels hus

Her er innledning

Tid og sted: 3. feb. 2015 14:15, rom 107, N.H. Abels hus

Helge Brunborg (Statistisk sentralbyrå)  holder et seminar i rom 107, 1. etasje N.H. Abels Hus kl. 14:15 tirsdag  3. februar: Hva skjer med verdens befolkningsutvikling?

Tid og sted: 29. jan. 2015 14:15 - 29. jan. 2014 16:00, B62, NH Abels hus

Helge Maakestad gives the Seminar in Algebra and Algebraic Geometry:

Generalized enveloping algebras, connections and characteristic classes

Tid og sted: 22. jan. 2015 14:15 - 22. jan. 2014 16:00, B62, NH Abels hus

Jan O. Kleppe, HiOA, gives the Seminar in Algebra and Algebraic Geometry:

On the Hilbert scheme of space curves

Tid og sted: 8. jan. 2015 14:15 - 8. jan. 2014 16:00, B62, NH Abels hus

Geir Ellingsrud, UiO, gives the Seminar in Algebra and Algebraic Geometry:

Abelian varieties XV: Abelian varieties are quotients of Jacobian varieties

Abonner
Abonner Lukk