Tidligere arrangementer - Side 104

Program for the seminar in Mathematical Logic spring 2015

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.

H?vard 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

Friday seminar by Andreas Hejnol, Sars International Centre for Marine Molecular Biology

J?rn Harald Hurum, Associate Professor - Norwegian Center for Paleontology

Guest lecture by Dr. Matthew Genge from the Imperial College, London, one of the leading scientists on micro meteorites.

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

Per ?berg, Universitetet i G?teborg

Einar Uggerud, Professor, Seksjon for fysikalsk kjemi og Senter for teoretisk og beregningsbasert kjemi (CTCC) Kjemisk institutt Universitetet i Oslo

Helge Maakestad gives the Seminar in Algebra and Algebraic Geometry:

Generalized enveloping algebras, connections and characteristic classes

Friday seminar by Rolf A. Ims

Ola Nilsen, Associate Professor - Department of Chemistry

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

On the Hilbert scheme of space curves

Join us at the seminar where The Research Council in Norway, represented by NCP Trude Dypvik, will provide information about the COST Action for our researchers.

Friday seminar by Terrence W. Deacon from Dept. of Anthropology, University of California, Berkeley. Now with abstract.

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

Abelian varieties XV: Abelian varieties are quotients of Jacobian varieties

Ingunn K. Wehus, Resercher, JPL, Caltech 

Asgeir Johan S?rensen, Director Centre for Autonomous Marine Operations and Systems (AMOS) Department of Marine Technology Norwegian University of Science and Technology,NTNU 

Christian Voigt (Glasgow) will give a talk with title: The structure of quantum permutation groups

Abstract: Quantum permutation groups, introduced by Wang, are a quantum analogue of permutation groups. These quantum groups have a surprisingly rich structure, and they appear naturally in a variety of contexts, including combinatorics, operator algebras, and free probability. In this talk I will give an introduction to these quantum groups, and review some results on their structure. I will then present a computation of the K-groups of the C*-algebras associated with quantum permutation groups, relying on methods from the Baum-Connes conjecture.  

Alfons van Daele, University of Leuven (Belgium), will give a talk with title: Separability idempotents and quantum groupoids

Andrea Riebler ( Dept. of math., NTNU) gives a seminar in room 107, 1st floor N.H. Abels House at 15:15 December 2nd: Projecting the future burden of cancer: Bayesian APC analysis made simple.

Modular forms are certain complex-analytic functions on the upper-half plane. They can also be interpreted as giving linear-algebraic invariants of elliptic curves, perhaps equipped with some extra structure, and in this way they reveal their algebraic-geometric nature. One of the most fundamental modular forms is the Dedekind eta function. However, it seems that only recently has it been pinned down precisely what extra structure on an elliptic curve is needed to define eta. Namely, Deligne was able to express this extra structure in terms of the 2- and 3-power torsion of the elliptic curve. Deligne's proof, apparently, is computational. In this talk I'll describe a conjectural reinterpretation of Deligne's result, together with some supporting results and a hint at a possible conceptual proof. The reinterpretation is homotopy theoretic, the key being to think of an elliptic curve as giving a class in framed cobordism. This directly connects the number "24" which often appears in the study of eta to the 3rd stable stem in topology. 

Friday seminar by Arnaud Le Rouzic. NEW TIME: 12.15

P?l Kristian Eriksen - Institutt for lingvistiske og nordiske studier, UiO