Previous events - Page 123

Alfredo Galindo-Uribarri, Oak Ridge National Laboratory / University of Tennessee, Knoxville.

Certain 3-dimensional lens spaces are known to smoothly bound 4-manifolds with the rational homology of a ball. These can sometimes be useful in cut-and-paste constructions of interesting (exotic) smooth 4-manifolds. To this end it is interesting to identify 4-manifolds which contain these rational balls. Khodorovskiy used Kirby calculus to exhibit embeddings of rational balls in certain linear plumbed 4-manifolds, and recently Park-Park-Shin used methods from the minimal model program in 3-dimensional complex algebraic geometry to generalise Khodorovskiy's result. The goal of this talk is to give an accessible introduction to the objects mentioned above and also to describe a much easier topological proof of Park-Park-Shin's theorem.  

Bartosz Kwasniewski (Odense) will give a talk with title: Paradoxicality and pure infiniteness of  C*-algebras associated to Fell bundles

Abstract: Abstract: In this talk we present conditions implying  pure infiniteness of the reduced cross-sectional $C^*$-algebra $C^*_r(\mathcal{B})$ of a Fell bundle $\mathcal{B}$ over a discrete group $G$. We introduce notions of aperiodicity, $\mathcal{B}$-paradoxicality and  residual $\mathcal{B}$-infiniteness.  We discuss their relationship with similar conditions studied, in the context of crossed products, by the following duos: Laca, Spielberg; Jolissaint, Robertson; Sierakowski, R{\o}rdam;  Giordano, Sierakowski and Kirchberg, Sierakowski.    (based on  joint work with Wojciech Szyma{\'n}ski)

Master i klinisk ernæring Lise Berven ved Farmasøytisk institutt vil forsvare sin avhandling for graden ph.d: Regulation of the tumor-associated protease legumain by dietary fiber and endogenous carbohydrate polymers.

Francesca Biagini, professor in mathematical finance from Ludwig-Maximillian University of Munich, will give an intensive course from Tuesday Sept 13 to Friday Sept 16.

Ata karakci, Postdoctoral Researcher , ITA

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.

Seckin Adali (UiO), gives the Seminar in Algebra and Algebraic Geometry:

Singularities of Restriction Varieties in OG(k,n)

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.  

The official opening of the national Ivar Giæver geomagnetic lab will be done September 7. Presentations and invited lectures are helt in the ZEB building, Aud 3. 

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.)

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. 

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. 

Open for all! Speakers: Corina E. Tarnita from Princeton University and Jan M. Nordbotten from Department of Mathematics, University of Bergen. This event is part of the University’s annual celebration.

A class of nonlinear evolution equations of second order

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

"Kummer surfaces and hyperkähler fourfolds, as degeneracy loci"

The Wilson Lecture speaker in 2016 will be Hope Jahren, Wilson Professor at CEED. The lecture will present the 30 most dramatic ways in which our planet has changed since the 1980’s — the numbers may surprise you. The lecture is in English and is open to all interested.

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

Upcoming seminar in meteorology and oceanography:

Speaker: Dr. Patrick Büker, Stockholm Environmental Institute (SEI),  York University, UK

The upcoming Friday Mingle will be special. The MSc graduates of summer 2016 will receive their diplomas. The newly enrolled MSc students will also be there. And there will of course be room for chat and eating of cake.

After the Friday Mingle - at 12.00 - there will also be a BBQ in the garden. 

Hope all of you are able to attend. 

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

Habiba Ismail Mtongori at the Department of Geosciences will be defending her dissertation: Climate change and the impacts on crop-agriculture in Tanzania

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

Doctoral candidate Habiba Ismail Mtongori at the Department of Geosciences will give a trial lecture on the given topic: El Niño, climate change and global food production