## Visiting address

Ullevål StadionSognsveien 77B

0855 OSLO

Norway

Time and place:
Aug. 24, 2015 1:15 PM - 2:00 PM,
Niels Henrik Abels hus, room 108

Tijana Levajkovic (University of Innsbruck) holds a lecture with the title: Chaos expansions for stochastic evolution equations.

Time and place:
Aug. 7, 2015 8:00 PM -
Aug. 11, 2015 6:45 AM,
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.

The Abel Symposium is administrated by the Norwegian Mathematical Society.

Time and place:
June 24, 2015 10:15 AM - 12:00 PM,
NHA B735

Klaus Thomsen, Aarhus Universitet, Denmark, will give a talk with title "KMS states and ground states for generalized gauge actions on graph C*-algebras"

Time and place:
June 17, 2015 2:15 PM - 4:00 PM,
NHA B735

John Quigg, Arizona State University at Tempe, USA, will give a talk with title: Landstad duality and a theorem of Pedersen

Abstract:

In joint work with Steve Kaliszewski and Tron Omland, we show how a theorem of Pedersen characterizing exterior equivalent actions on a C*-algebra can be parlayed into an equivalence between two equivariant categories of C*-algebras. In one category, isomorphisms correspond to outer conjugacies of actions, while isomorphisms in the other category are equivariant isomorphisms of the crossed products that respect the generalized fixed point algebras. This category equivalence is a variation of Landstad's original characterization of actions up to equivariant isomorphism, where we now allow more morphisms. Time permitting, we will compare our "outer duality" with Landstad duality and also with Imai-Takai crossed-product duality.

Time and place:
June 9, 2015 2:15 PM - 4:00 PM,
NHA Building B738

Alfons van Daele (University of Leuven, Belgium) will give a talk with title: Constructing locally compact quantum groups from pairs of *-algebras

Abstract: Let (A,\Delta) be a finite-dimensional Hopf *-algebra. The dual B of A is again a finite-dimensional Hopf *-algebra. The entire structure of these two Hopf *-algebras is encoded in the *-algebras A and B and the pairing between the two. We will explain how this works. This is in fact true in many more, and more general situations. In particular, we give an example constructed from a pair of subroups H,K of a group G with the property that the map (h,k)-> hk is a bijection from HxK to G. This method is used in a joined paper with Magnus Landstad where we construct a pair of locally compact quantum groups from such pairs of subgroups of a locally compact group G.

Time and place:
May 29, 2015 -
May 30, 2015,
Klækken Hotell

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 Oslo-region as well as their teachers and supervisors to a 2-days workshop.

Time and place:
May 28, 2015 10:15 AM - 11:00 AM,
room 1036 in Niels Henrik Abels hus

Computable error estimates for Monte Carlo finite element approximation of elliptic PDE with lognormal diffusion coefficients

Time and place:
May 27, 2015 2:15 PM - 4:00 PM,
NHA 738

Adam Sørensen (UiO) will give a talk with title "Leavitt path algebras - a connection between pure algebra and operator algebras"

Abstract: We will discuss Leavitt path algebras, the purely algebraic cousins of the analytic graph C*-algebras. We will discuss similarities and differences, in particular recent work with Brownlowe on a purely algebraic version of Kirchberg's theorem that all exact C*-algebras embed into O_2.

Time and place:
May 26, 2015 2:15 PM - 3:00 PM,
Room U32 (Note: Floor -1), Niels Henrik Abel's Building

Stein Andreas Bethuelsen (Universiteit Leiden) gives a lecture with the title: Random walks in (dynamic) random environment

Time and place:
May 26, 2015 2:00 PM - 4:00 PM,
NHA B735

Marco Matassa (UiO) will give a talk with title The Dolbeault-Dirac operator on quantized projective spaces, revisited

Abstract: In this talk I will present a new construction for the Dolbeault-Dirac operator on quantum projective spaces, the main result being the computation of its square. This clarifies and generalizes some results of D'Andrea-Dąbrowski. Moreover it gives a class of explicit examples of the general construction of Krähmer-Tucker Simmons, which deals with such operators on irreducible generalized flag manifolds.

Time and place:
May 23, 2015 -
May 24, 2015,
University of Oslo

Fourteenth International Workshop

Time and place:
May 21, 2015 2:15 PM - 4:00 PM,
B62, NH Abels hus

Carsten Lütken, UiO, gives the Seminar in Algebra and Algebraic Geometry:

Modular curves VIII

Time and place:
May 21, 2015 1:15 PM - 2:15 PM,
Georg Sverdrups hus, Aud. 1

The Skolem Lecture is an annual event in honor of the Norwegian mathematician and logician Thoralf Skolem.

This years Skolem Lecturer will be

Michael Rathjen, The University of Leeds:

"On relating strong type theories and set theories"

Time and place:
May 21, 2015 -
May 22, 2015,
University of Oslo

Time and place:
May 12, 2015 11:00 AM - 12:00 PM,
B735

Roberto Conti (La Sapienza, Rome) will give a talk with title "C*-algebras and Fourier theory"

Time and place:
May 6, 2015 2:15 PM - 4:00 PM,
B735

Robert Yuncken (Univ. Clermont-Ferrand II, France) will give a talk with title: A groupoid approach to pseudodifferential operators

Abstract: Connes introduced the "tangent groupoid" of a manifold as a geometric device for linking a classical pseudodifferential operator to its symbol, yielding a novel proof of the Atiyah-Singer index theorem. Since then, numerous variations on the tangent groupoid have been produced, each adapted to a different class of pseudodifferential operators. In this talk we will consider the reverse problem: associating to a given tangent groupoid a pseudodifferential calculus. We shall show that the kernels of classical pseudodifferential operators are precisely the essentially homogeneous fibrewise distributions on Connes' tangent groupoid. This leads to a natural pseudodifferential calculus of subelliptic type on a manifold with a filtration on its Lie algebra of vector fields.

Time and place:
Apr. 30, 2015 2:15 PM - 4:00 PM,
B62, NH Abels hus

Fredrik Meyer, UiO, gives the Seminar in Algebra and Algebraic Geometry:

Modular curves VII

Time and place:
Apr. 30, 2015 11:15 AM - 12:00 PM,
Room 1036 (Niels Henrik Abels hus)

**Comments on the Galilean limits of Maxwell's equations**

Time and place:
Apr. 27, 2015 11:15 AM - 12:00 PM,
Room 1036 (Niels Henrik Abels hus).

Convex relaxation, graph cut and continuous max-flow algorithms for image processing and computer vision.

Time and place:
Apr. 23, 2015 2:15 PM - 4:00 PM,
B62, NH Abels hus

Pietro De Poi (Udine), gives the Seminar in Algebra and Algebraic Geometry:

A Severi type theorem on surfaces in P^6

Time and place:
Apr. 20, 2015 -
Apr. 24, 2015,
The Norwegian Academy of Sciences and Letters

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)

Time and place:
Apr. 16, 2015 2:15 PM - 4:00 PM,
B62, NH Abels hus

Kristian Ranestad, UiO, gives the Seminar in Algebra and Algebraic Geometry:

Modular curves VI

Time and place:
Apr. 16, 2015 2:00 PM - 3:00 PM,
Niels Henrik Abels hus, room 1036

Prof. Dr. Alois Gisler (ETH Zurich, RiskLab Switzerland) holds a seminar with the title "On the Development of the Swiss Solvency Test"

Time and place:
Apr. 15, 2015 3:00 PM,
Sparebank 1

Prof. Dr. Alois Gisler (ETH Zurich, RiskLab Switzerland) holds a seminar with the title "The Reserve Risk of the Chain-Ladder Reserving Method from a New Perspective"

Time and place:
Apr. 15, 2015 2:15 PM - 3:15 PM,
NHA B735

Réamonn Ó Buachalla (IMPAN) will give a talk with title: Noncommutative Kähler structures on quantum homogeneous spaces

Abstract:

Building on the definition of a noncommutative complex structure for a general algebra A, I will introduce the notion of a noncommutative Kähler structure for A. In the special case where A is a quantum homogeneous space, I show that many of the fundamental results of classical Kähler geometry follow from the existence of such a structure: Hodge decomposition, Serre duality, the Hard Lefschetz theorem, the Kähler identities, and collapse of the Frölicher spectral sequence at the first page. We then apply these results to Heckenberger and Kolb's differential calculus for quantum projective space, and show that they have cohomology groups of at least classical dimension. Time permitting, I will also discuss the relationship of this work to Connes proposal to study positive Hochschild cocycles as a starting point for noncommutative complex geometry, and Fröchlich, Grandjean, and Recknagel's definition of a Kähler spectral tuple.