Tidligere gjesteforelesninger og seminarer - Side 73

Are Raklev, førsteamanuensis, Fysisk institutt, UiO.

Rüdiger Kiesel,Uni. Essen/CMA, holder et seminar med tittelen: Model Risk for Energy Markets

Hsiao-Hsuan Lin, post doc. ved Institutt for teoretisk astrofysikk, UiO

Abstract: We introduce the notion of Arakelov motivic cohomology, and discuss the beautiful reformulation (due to Jakob Scholbach) of the Beilinson conjectures on special values of L-functions. 

Andre Suess, Uni. Barcelona, holder et seminar med tittelen: Integration theory for infinite dimensional processes

Nils Detering, Frankfurt School of Finance and Management, holder et seminar med tittelen: Measuring the model risk of contingent claims

Peder Østbye (Simonsen Advokatfirma) will talk about

Econometrical and statistical models in competition law evidence assessments

Friday seminar by Reiichiro Nakamichi

Øystein Elgarøy, Institutt for teoretisk astrofysikk, UiO

Raazesh Sainudiin (Department of Mathematics and Statistics, University of Canterbury) will talk about

Minimum Distance Estimation over Adaptive Histograms from Randomized Priority Queues on Statistical Regular Pavings

Kristin Mikkelsen, phd-stipendiat, Institutt for teoretisk astrofysikk, UiO

Atsushi Takeuchi, Uni. Osaka City, holder et seminar med tittelen: Asymptotic behavior of densities for stochastic functional differential equations

Guest lecture by Professor Gail D. Hughes.

Friday seminar by Eske Willerslev

Iain Brown, Institutt for teoretisk astrofysikk, UiO

Joint seminar of the Theory group and the AMCS group

Speaker: Professor Constantino Tsallis, Brazilian Center for Physics Research and National Institute of Science and Tech  

Abstract: The Kolmogorov decomposition of positive scalar valued kernels has played an important role in applications of operator theory to function theory.  It has been vastly generalised, finding its apotheosis in the result of Baretto, Bhat, Liebscher and Skeide which states that a positive $L(A,B)$-valued kernel, $A$ and $B$ $C^*$-algebras, has a Kolmogorov decomposition if and only if it is completely positive; that is, the restriction of the kernel to any finite set of index points gives a completely positive map.  The result may be viewed as a generalisation of the Stinespring dilation theorem from single point to multi-point index sets.  This talk presents the analogue of the Haagerup-Paulsen-Wittstock decomposition theorem for $L(A,B)$-valued kernels (where now $B$ is assumed to be injective).  It happens that in general complete boundedness of the kernel (ie, complete boundedness of the map resulting from restriction of the kernel to any finite index set) is not quite enough to ensure a decomposition: a certain regularity condition must also hold.  This condition can be seen to be automatic if the kernel is completely positive or the index set is countable.  This is joint work with Tirthankar Bhattacharyya and Chris Todd.  

Hans Pecseli, professor, Fysisk institutt, UiO.

Abstract: In topology, there is a correspondence between generalized cohomology theories (in the sense of the Eilenberg-Steenrod axioms) on one hand and spectra on the other hand, the latter being objects in the stable homotopy category SH. In algebraic geometry and motivic homotopy theory, the situation is much more complicated in several ways. Firstly, there are many stable homotopy categories, one for each scheme, and various functors between them. Secondly, there are many sets of axioms for what a cohomology theory should be (Weil cohomology, Bloch-Ogus cohomology, oriented cohomology, ...) and a huge zoo of cohomology theories. The aim of the talk will be to give an overview of all generalized cohomology theories in algebraic geometry, using the language of motivic stable homotopy theory. 

Jukka Lempa, EMMOS/CMA, holder et seminar med tittelen: Some Properties of Harmonic Functions for Diffusion Processes

Friday seminar by Hervé Seligmann

NOTE: This will NOT be a Friday Seminar, but rather a Friday Tutorial. It will be two hours rather than one, using blackboard and live demos rather than slides.

Abstract: Klassifikasjon av mangfoldigheter leder ofte til spørsmål om h-kobordente mangfoldigheter er homeomorfe eller ikke. Jeg skal presentere noen nye resultater av Slawomir Kwasik og meg selv om dette viktige problemet.