Tidlegare arrangement - Side 71

A tropical curve is a graph embedded in R^2 satisfying a number of conditions. Mikhalkin's celebrated correspondence theorem establishes a correspondence between algebraic curves on a toric surface and tropical curves. This translates the difficult question of counting the number of algebraic curves through a given number of points to the question of counting tropical curves, i.e. certain graphs, with a given notion of multiplicity through a given number of points which can be solved combinatorially.  To get an invariant count, real rational algebraic curves are counted with a sign, the Welschinger sign and there is a real version of the correspondence theorem. Furthermore, Marc Levine defined a generalization of the Welschinger sign that allows to get an invariant count of algebraic curves defined over an arbitrary base field. For this one counts algebraic curves with a certain quadratic form.

In the talk I am presenting work in progress joint with Andrés Jaramillo Puentes in which we provide a version Mikhalkin's correspondence theorem for an arbitrary base field, that is a correspondence between algebraic curves counted with the above mentioned quadratic form and tropical curves counted with a quadratic enrichment of the multiplicity. Then I will explain how to use this quadratic correspondence theorem to do the count of algebraic curves over an arbitrary base field.

Learn about DataverseNO - a new institutional data archive for open data at UiO.

We will discuss the recent theory of Nikulin orbifolds and orbifolds of Nikulin type in dimension 4. Nikulin orbifolds are irreducible holomorphic symplectic orbifolds which are partial resolutions of quotients of IHS manifolds of K3^[n] type. Their deformations are called orbifolds of Nikulin type. Our main aim will be the description of the first known locally complete family of projective irreducible holomorphic symplectic orbifolds of dimension 4 which are of Nikulin type. It is a family of IHS orbifolds that appear as double covers of special complete intersections (3,4) in P^6. This is joint work with Ch. Camere and A. Garbagnati.

C*-algebra seminar talk by Lucas Hataishi (University of Oslo)

Welcome to a talk by Dr Dmitry Chernyshov, SNBL at the ESRF, Grenoble, France. (ESRF.fr)

Doctoral candidate Yu-Ping Fu at the Department of Pharmacy, Faculty of Mathematics and Natural Sciences, is defending the thesis "Bioactive polysaccharides and phenolic compounds from two Aconitum plants: Aconitum carmichaelii and Aconitum septentrionale"for the degree of Philosophiae Doctor.

By José Pablo Vázquez-Medina from the University of Bekerley

Mattia L. Mazzucchelli is a Alexander Von Humboldt Fellow at Johannes Gutenberg University of Mainz. 

Hylleraas seminar, hosted in Tromsø

Welcome to our GEOHYD Lunch Seminar Friday 17th of February @ 12:15 in Aud. 2, Geology building or via videolink using Zoom. The seminar is helt by Lizz Ultee, Middlebury College.

Doctoral candidate Maged Helmy at the Department of Informatics, Faculty of Mathematics and Natural Sciences, is defending the thesis A Software Architecture for AI-based, Efficient, Real-Time, Resource Limited Medical Image Analysis: A Case Study of a Quantitative Analysis of Microcirculatory System for the degree of Philosophiae Doctor.

Jan Eivind Myhre, Professor Emeritus at the Department of Archaeology, Conservation and History, University of Oslo.

Sender/mottaker svitsj for ekkolodd med PIN-diode

Is it difficult to set aside time to write? The Academic Writing Centre organsises structured writing sessions for doctoral students.

Following Givental, enumerative mirror symmetry can be stated as a relation between genus zero Gromov-Witten invariants and period integrals. I will talk about a relative version of mirror symmetry that relates genus zero relative Gromov-Witten invariants of smooth pairs and relative periods. Then I will talk about how to use it to compute the mirror proper Landau-Ginzburg potentials of smooth log Calabi-Yau pairs.

Welcome to our dScience lunch seminar in the Science Library! This event is open to everyone.

Mange dyr viser kompleks atferd som å bygge reder, verktøybruk, lek, og sosialisering. Noen dyr kan også utføre avanserte oppgaver som å trykke på brytere for å få belønning, navigere byer, og i noen tilfeller rudimentært tegnspråk.

Bioteknologi spiller en stadig større rolle i livene våre, og på Bioteknologidagen får du høre om høydepunktene fra året som gikk og hva vi tror vil prege 2023 videre.

Bioteknologi spiller en stadig større rolle i livene våre, og på Bioteknologidagen får du høre om høydepunktene fra året som gikk og hva vi tror vil prege 2023 videre.

Sarif Khan, University of Göttingen

_{Weekly Theory Seminar.}