## Visiting address

Niels Henrik Abels husMoltke Moes vei 35 (map)

0851 OSLO

Norway

Time and place:
Sep. 20, 2019 10:15 AM,
"Abels utsikt", 12. etasje, Niels Henrik Abels hus.

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M.Sc. Vegard Vinje ved Matematisk institutt avholder prøveforelesning over oppgitt emne:

"*Integrated artificial intelligence and computational fluid dynamic approaches for patient-specific simulations - current state of the art and potential applications in the cerebrospinal fluid area*".

M.Sc. Knut Dagestad Rand ved Matematisk institutt avholder prøveforelesning over oppgitt emne:

*"Methods for measuring and estimating cell type composition and heterogeneity in tissue samples using single cell sequencing data"*.

M.Sc. Knut Dagestad Rand ved Matematisk institutt vil forsvare sin avhandling for graden ph.d.

**Towards Inference with Graph Based Genome Representations**

Time and place:
Sep. 20, 2019 1:15 PM,
"Abels utsikt", 12. etasje, Niels Henrik Abels hus.

M.Sc. Vegard Vinje ved Matematisk institutt vil forsvare sin avhandling for graden ph.d.

*Mathematical Modeling of Cerebrospinal Fluid Pulsatility and Pathways*

Olli Saarela (Dalla Lana School of Public Health, University of Toronto, CAN) will give a talk on September 24th at 14:15 in the Erling Sverdrups plass, Niels Henrik Abels hus, 8th floor.

Where do you store assignments? What about lists of personell information for a research group? What about their phone numbers? Do you have interviews of people? Pictures? What about research data? What kind of data is it? How to share different types of data with others in a functional and legal manner? This talk will provide a practical guide for users in the current framework of laws and regulations. Attendance to the talk is highly recommended for everyone at the Department.

During the past 25 years there has been a significant activity constructing and analyzing C*-algebras and C*-algebraic dynamical systems from semigroups of number theoretic origin. Among these are the semigroup C*-algebras of the affine semigroup of the ring of algebraic integers in a number field, which are closely related to the Bost-Connes systems giving a thermodynamic interpretation of the Riemann and Dirichlet zeta-functions. The K-theory of the associated boundary quotients has been computed and also the phase transition of equilibrium states at low temperature has been exhibited via a natural parametrization. There is an intriguing, and still not understood, parallel in that the same C*-algebra lies at the heart of the solution of both problems. The goal of the master class is to introduce the participants to these and related topics lying at the intersection of several branches of mathematics.

The master class is a part of the project "Pure Mathematics in Norway, 2018-2022", supported by the Bergen Research Foundation and the Tromsø Research Foundation.

Time and place:
Sep. 17, 2019 2:15 PM–3:15 PM,
Niels Henrik Abels hus, 8th floor

Nicola Sartori (Department of Statistical Sciences, University of Padova, ITA) will give a talk on September 17th at 14:15 in the Erling Sverdrups plass, Niels Henrik Abels hus, 8th floor.

Time and place:
Sep. 16, 2019 10:00 AM–11:00 AM,
Niels Henrik Abels Hus: Room 1120

Prof. Rüdiger Kiesel from the University of Duisburg-Essen will give a Seminar Lecture with the Title: **"Carbon Risks on Financial Markets"**

Time and place:
Sep. 5, 2019 2:00 PM–4:30 PM,
Vienna, Austria

You are cordially invited to an afternoon of three seminar talks on recent topics in stochastic analysis in high dimensions. The talks take place at the Wolfgang Pauli Institute in Vienna, Austria (https://www.wpi.ac.at).

Time and place:
Sep. 4, 2019 2:15 PM–3:15 PM,
NHA 723

Kenny De Commer (Vrije Universiteit Brussel, Belgium) will give a talk titled: Spectral *-algebras and quantum group actions

Time and place:
Sep. 3, 2019 2:15 PM–3:15 PM,
Niels Henrik Abels hus, 8th floor

Lara Lusa (Department of Mathematics, University of Primorska, SLO) will give a talk on September 3rd at 14:15 in the Erling Sverdrups plass, Niels Henrik Abels hus, 8th floor.

Time and place:
Sep. 3, 2019 1:15 PM–2:00 PM,
Niels Henrik Abels hus: Undervisningsrom 1120

Prof. Andrey Pilipenko from The National Academy of Sciences of Ukraine will give a seminar lecture with the title:

**On Exponential Stability of SDEs with Discontinuous Drift**

Time and place:
Aug. 30, 2019–Aug. 31, 2019,
Tøyen hovedgård

The scope of the workshop: This international workshop brings together scientist from a wide range of fields with a special interest in bio-mechanics phenomena from cellular scale to the size of organs. Through a series of short talks the participants will present their work, where the workshop strives to stimulate scientific exchange and to initiate new collaborations.

Time and place:
Aug. 29, 2019 2:30 PM–3:30 PM,
Rest area, 10th floor NHA

**Abstract:**

A well-studied problem in computer vision is "structure from motion", where 3D structures and camera poses are reconstructed from given 2D images taken by the unknown cameras. The most classical instance is the 5-point problem: given 2 images of 5 points, the 3D coordinates of the points and the 2 camera poses can be reconstructed. In fact, given 2 generic images of 5 points, this problem has 20 solutions (i.e., 3D coordinates + 2 camera poses) over the complex numbers. Reconstruction problems which have a finite positive number of solutions given generic input images, such as the 5-point problem, are called "minimal". These are the most relevant problem instances for practical algorithms, in particular those with a small generic number of solutions.

We formally define minimal problems from the point of view of algebraic geometry. Our algebraic techniques lead to a classification of all minimal problems for point-line arrangements and any number of cameras. We compute their generic number of solutions with symbolic and numerical methods.

This is joint work with Timothy Duff, Anton Leykin, and Tomas Pajdla.

NB! Coffee/Tea/Biscuits from 14.00.

Time:
Aug. 29, 2019 10:15 AM–Sep. 5, 2019 12:00 PM

The seminar in Mathematical Logic will take place in the meeting room of the Computer Science building Thursdays 10.15 - 12.00.

Time and place:
Aug. 25, 2019 9:00 AM–Aug. 30, 2019 4:00 PM,
Risør hotell

The purpose of the conference is to bring together leading researchers and students in stochastic analysis and applications, to discuss new results and research challenges, with emphasis on stochastic analysis, stochastic control and information, random fields, and applications to risk models in finance, biology, insurance and physics.

Time and place:
Aug. 21, 2019 2:15 PM–3:15 PM,
NHA 107

Petter Nyland (NTNU) will give a talk titled: Matui’s Conjectures for Étale Groupoids.

Time and place:
Aug. 21, 2019 1:15 PM,
"Abels utsikt", 12. etasje, Niels Henrik Abels hus

M.Sc. Jonas Irgens Kylling ved Matematisk institutt vil forsvare sin avhandling for graden ph.d.

**Calculations of Motivic Invariants**

Time and place:
Aug. 21, 2019 11:15 AM–12:00 PM,
Seminar room 1119, Niels Henrik Abels hus

Time and place:
Aug. 21, 2019 10:15 AM,
"Abels utsikt", 12. etasje, Niels Henrik Abels hus

M.Sc. Jonas Irgens Kylling ved Matematisk institutt avholder prøveforelesning over oppgitt emne:

"The Grothendieck–Lefschetz trace formula".

Time and place:
Aug. 20, 2019 2:10 PM–3:15 PM,
Niels Henrik Abels hus, 8th floor

Jesse Hemerik (Department of Biostatistics, University of Oslo) will give a talk on August 20th at 14:15 in the Erling Sverdrups plass, Niels Henrik Abels hus, 8th floor.

Time and place:
Aug. 19, 2019 10:15 AM–12:00 PM,
Niels Henrik Abels hus: Undervisningsrom 1119

Monday 19 August 2019 **Mohamed MNIF** from the **Ecole Polytechnique de Tunisie** and **Yaozhong HU** from the **University of Alberta** will give two seminar lectures at the section of Stochastic analysis, Finance and risks. Titles and Abstracts below.

Time and place:
June 21, 2019 2:15 PM–3:15 PM,
Niels Henrik Abels hus, 8th floor

Johannes Lederer (Faculty of Mathematics, Ruhr-Universität of Bochum, GER) will give a talk on June 21st at 14:15 in the Erling Sverdrups plass, Niels Henrik Abels hus, 8th floor.