## Visiting address

Ullevål StadionSognsveien 77B

0855 OSLO

Norway

Time and place:
Sep. 8, 2016 2:15 PM - 3:15 PM,
B637 NHA

In the nineties, Deninger gave a detailed description of a conjectural cohomological interpretation of the (completed) Hasse-Weil zeta function of a regular scheme proper over the ring of rational integers. He envisioned the cohomology theory to take values in countably infinite dimensional complex vector spaces and the zeta function to emerge as the regularized determinant of the infinitesimal generator of a Frobenius flow. In this talk, I will explain that for a scheme smooth and proper over a finite field, the desired cohomology theory naturally appears from the Tate cohomology of the action by the circle group on the topological Hochschild homology of the scheme in question.

Time and place:
Sep. 7, 2016 10:15 AM - 12:00 PM,
B801

Abstract: Exploring connections between subfactors and conformal field theories, Vaughan Jones recently observed that planar algebras give rise to unitary representations of the Thompson group F, and more generally, to unitary representations of the group of fractions of certain categories. Remarkably, this procedure applies to oriented link invariants. In particular, a suitably normalized HOMFLYPT polynomial is a positive definite function on the oriented Thompson group. (Based on joint work with V. Aiello and V. Jones.)

Time and place:
Sep. 6, 2016 10:15 AM - 12:00 PM,
B 738

The motivic Adams spectral sequence is a general tool for calculating homotopy groups of a motivic spectrum X. We will investigate the construction of the motivic Adams spectral sequence, determine the second page of the spectral sequence, and identify what it converges to in good cases. If time permits, we will show how to use the motivic Adams spectral sequence to obtain explicit calculations of the motivic homotopy groups of spheres and other spectra.

Time and place:
Sep. 5, 2016 1:00 PM -
Sep. 7, 2016 4:00 PM,
Meeting room 12th Floor NHA hus

On 5-7 September the first STORE PHD Gathering will take place, with two intensive courses. The first is on the new class of stochastic processes called Trawl processes and instructed by Almut Veraart from Imperial College London, UK. The second is led by Rudiger Kiesel from University of Duisburg-Essen, Germany, and focuses on intra-day trading of electricity.

Time and place:
Sep. 2, 2016 10:15 AM - 11:00 AM,
Undervisningsrom 801, Niels Henrik Abels hus

A class of nonlinear evolution equations of second order

Time and place:
Sep. 1, 2016 2:15 PM - 4:00 PM,
B638, NH Abels hus

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

*"Kummer surfaces and hyperkähler fourfolds, as degeneracy loci"*

Time and place:
Aug. 31, 2016 9:15 AM - 10:00 AM,
Niels Henrik Abels hus, room U26

Arturo Kohatsu-Higa (Ritsumeikan University, Kusatsu, Japan) gives a lecture with the title: Probabilistic interpretation of the parametrix method

Time and place:
Aug. 25, 2016 2:30 PM - 3:30 PM,
Rest area 7.floor NHA

Coffee/Tea/Biscuit from 14.00

Time:
Aug. 25, 2016 2:15 PM

Prof. Yasunori Fujikoshi (Hiroshima University) will give a seminar in Sverdrups plass (lunch area), 8th floor, Niels Henrik Abels hus at 14:15.

Time and place:
Aug. 25, 2016 10:15 AM - 12:00 PM,
9th floor-Ole Johan Dahls hus

The Logic Seminar will take place at the same time and location as in previous terms.

Andrea Cremaschi: Bayesian inference and prediction for high-frequency data using Particle Filtering

Time:
Aug. 16, 2016 2:15 PM

Andrea Cremaschi (earlier University of Kent, now UiO) will give a seminar in the lunch area, 8th floor Niels Henrik Abels hus at 14:15.

Time and place:
Aug. 16, 2016 10:15 AM,
B 738 NHA

Bloch constructed higher cycle class maps from higher Chow groups to Deligne cohomology and étale cohomology. I will define a map from the motivic Eilenberg-Mac Lane spectrum to the spectrum representing Deligne cohomology in the motivic stable homotopy category over C such that it gives Bloch's higher cycle class map on cohomology. The map is induced by the map from Voevodsky's algebraic cobordism spectrum MGL to the Hodge-filtered complex cobordism spectrum defined by Hopkins-Quick. This extends a result of Totaro showing that the usual cycle class map to singular cohomology factors through complex cobordism modulo the coefficients of the Lazard ring MU^{2*} tensor_L Z. This is joint work with Amit Hogadi.

Time and place:
Aug. 11, 2016 2:15 PM - 3:00 PM,
Niels Henrik Abels hus, room 935

Yaozhong Hu (University of Kansas, USA) gives a lecture with the title: Rate of convergence and asymptotic error distribution of Euler approximation schemes for fractional diffusions

Time and place:
Aug. 11, 2016 1:15 PM - 2:00 PM,
Niels Henrik Abels hus, room 935

Olfa Draouil (University of Tunis El Manar, Tunisia) gives a lecture with the title: Optimal insider control of stochastic partial differential equations

Time and place:
July 5, 2016 8:30 AM -
July 7, 2016 6:00 PM,
Wolfgang Pauli Institute, Vienna

On 5-7 July 2016, there will be a conference on the mathematics of energy markets organized at the Wolfgang Pauli Institute (WPI) in Vienna, Austria. The conference is an activity within the thematic program "Mathematics for Risk in Finance and Energy" at the WPI.

We welcome participants from academia and industry to take part in this event.

A **pre-conference intensive course** on stochastic modelling of energy markets will be organized on Monday July 4. The course leader will be Professor Fred Espen Benth. Click here to get more information about the intensive course.

Time and place:
July 4, 2016 9:00 AM - 4:00 PM,
Wolfgang Pauli Institute, Vienna

By participating in this intensive course, you will learn about recent developments in the modelling of the random dynamics of forward and futures prices in energy (and commodity) markets. A general theoretical framework for stochastic processes with values in function space is developed, and applied to the particular situation of forward price modelling, yielding a class of space-time random fields.

The course requires a knowledge in stochastic analysis.

Time and place:
June 27, 2016 1:15 PM,
Aud. 4 Vilhelm Bjerknes' hus

M.Sc. Reidar Kvale Joki ved Matematisk institutt vil forsvare sin avhandling for graden ph.d.:

*Failure Mechanisms in Fibre Reinforced Polymer Composites - Experimental and Numerical Analysis*

Time and place:
June 27, 2016 10:15 AM,
Aud. 4 Vilhelm Bjerknes' hus

M.Sc. Reidar Kvale Joki ved Matematisk institutt avholder prøveforelesning over oppgitt emne: "Overview of recent development of fatigue driven delamination of composites".

Time and place:
June 24, 2016 10:15 AM - 11:00 AM,
NHA, room 1036

Multi-index Monte Carlo and Multi-index Stochastic Collocation

Time and place:
June 23, 2016 -
June 28, 2016,
Quality Hotel, Tønsberg, Norway

The conference is part of a joint French-Norwegian conference series on curves and surfaces. In Norway previous meetings were held in Oslo 1988, Biri 1991, Ulvik 1994, Lillehammer 1997, Oslo 2000, Tromsø 2004, Tønsberg 2008, and Oslo 2012. In France the last meeting was in Paris 2014.

Time and place:
June 16, 2016 10:15 AM - 12:00 PM,
NHA B735

In this talk I will present a paper by D. Bisch, R. Nicoara and S. Popa where continuous families of irreducible subfactors of the hyperfinite II_1 factor which are non-isomorphic, but have all the same standard invariant are constructed. In particular, they obtain 1-parameter families of irreducible, non-isomorphic subfactors of the hyperfinite II_1 factor with Jones index 6, which have all the same standard invariant with property (T).

Time:
June 14, 2016 2:15 PM - 3:00 PM

Igor Barros Barbosa (PhD candidate at Department of Computer and Information Science at NTNU) gives a seminar on deep learning at Department of Mathematics on the 8th floor of Niels Henrik Abels hus.

Time and place:
June 9, 2016 2:15 PM - 4:00 PM,
B738, NH Abels hus

Ritwik Mukherjee (TIFR) gives the Seminar in Algebra and Algebraic Geometry:

**Title: **Enumerative Geometry of singular curves in a Linear System

**Abstract:** Enumerative geometry is a branch of mathematics that deals with the following question: "How many geometric objects satisfy certain constraints". A well known class of enumerative question is to count curves in a linear system H^0(X,L) that have some prescribed singularities. In this talk we will describe a topological method to approach this problem. We will express the enumerative numbers as the Euler class of an appropriate bundle. We will then go on to explain how we compute the degenerate contribution of the Euler class using a topological method.

Time and place:
June 1, 2016,
Abels utsikt, 12.etasje i Niels Henrik Abels hus

We invite you to a one-day workshop celebrating Professor Bent Natvig's 70th anniversary. Invited speakers will present recent developments in some of the areas where Bent has made significant contributions, including reliability theory and mathematical statistics.

Bent Natvig has, since 1986, been a professor of mathematical statistics at the Department of Mathematics. He is the author of a long list of important papers published in top-ranked scientific journals as well as the recent book entitled "Multistate Systems Reliability Theory with Applications" (John Wiley & Sons). At our department, Bent has taken the leading role in the area of reliability theory. On August 1 this year, he turns 70.

Time and place:
May 30, 2016 2:15 PM - 3:00 PM,
Niels Henrik Abels hus, room 801

Dr. Nacira Agram (University of Biskra, Algeria) gives a lecture with the title: Stochastic optimal control of McKean-Vlasov equations with anticipating law.