Tidligere arrangementer
UiO:Energy and Environment is relaunching our popular series of short talks from early career researchers. Grab some food and refreshments while you learn about exciting research in sustainable energy, climate and environment. The event is free and open for all.
*NB! The workshop has been postponed to the autumn term due to illness*
Kick-off workshop for the HF Strategic Research Priorities Project 'Communication with Large Language Models' (2024-2028)
The interactive full day event Oslo Hydrogen Seminar the 23rd of April is dedicated storage of hydrogen. The seminar is organised by researchers at Section for Environmental Geosciences at Dept. of Geosciences in collaboration with the HYSTORM research project, and University of Edinburgh.
International Conference
Webinar held by Nuno Antunes, Partner at Miranda & Associados, Portugal, Lead of the AIEN Hydrogen Taskforce.
Join us for the first NoRMAS meeting aimed at fostering collaboration and advancing research in the field of astronomy at long wavelengths, i.e infrared, (sub)millimeter and radio.
Welcome to the first Norwegian Planetary Health Alliance conference.
Welcome to our dScience lunch seminar in the Science Library, with Trude Storelvmo from the Department of Geosciences.
The Green Office celebrates its first year, and we invite you to join the birthday celebration!
University of Oslo and University of Gothenburg invite to an informal workshop within machine learning with a focus on statistical aspects related to Machine Learning.
Det ?rlige m?tepunktet for alle som arbeider med formidling og utstillinger p? museum. ?rets tema: Relevans.
The Cultural Heritage Day is a day for dialogue and inspiration for everyone who studies and works with cultural heritage.
Kulturarvsdagen er en dag for dialog og til inspirasjon for alle som studerer og arbeider med kulturarv og kulturminner.
I forbindelse med den internasjonale Morsm?lsdagen inviterer Senter for flerspr?klighet - MultiLing og Nationaltheatret til et arrangement med fokus p? kunstens rolle for forsoning og revitalisering av minoriteters spr?k og kultur. Arrangementet er gratis og ?pent for alle, men p?melding kreves.
Do you want to learn more about sustainability work at UiO? Maybe you have a great idea for how to make UiO greener? Or possibly you have THE idea that will save us from the climate crisis? Then sign up for the Green Office’s Sustainathon!
Phase tropical surfaces can appear as a limit of a 1-parameter family of smooth complex algebraic surfaces. A phase tropical surface admits a stratified fibration over a smooth tropical surface. We study the real structures compatible with this fibration and give a description in terms of tropical cohomology. As an application, we deduce combinatorial criteria for the type of a real structure of a phase tropical surface.
Phase tropical surfaces can appear as a limit of a 1-parameter family of smooth complex algebraic surfaces. A phase tropical surface admits a stratified fibration over a smooth tropical surface. We study the real structures compatible with this fibration and give a description in terms of tropical cohomology. As an application, we deduce combinatorial criteria for the type of a real structure of a phase tropical surface.
In 1962 Ehrhart proved that the number of lattice points in integer dilates of a lattice polytope is given by a polynomial — the Ehrhart polynomial of the polytope. Since then Ehrhart theory has developed into a very active area of research at the intersection of combinatorics, geometry and algebra.
The Ehrhart polynomial encodes important information about the polytope such as its volume and the dimension. An important tool to study Ehrhart polynomials is the h*-polynomial, a linear transform of the Ehrhart polynomial which is given by the numerator of the generating series. By a famous theorem of Stanley the coefficients of the h*-polynomial are always nonnegative integers. In this talk, we discuss generalizations of this result to weighted lattice point enumeration in rational polytopes where the weight function is given by a polynomial. In particular, we show that Stanley’s Nonnegativity Theorem continues to hold if the weight is a sum of products of linear forms that a nonnegative over the polytope. This is joint work with Esme Bajo, Robert Davis, Jesús De Loera, Alexey Garber, Sofía Garzón Mora and Josephine Yu.
In 1962 Ehrhart proved that the number of lattice points in integer dilates of a lattice polytope is given by a polynomial — the Ehrhart polynomial of the polytope. Since then Ehrhart theory has developed into a very active area of research at the intersection of combinatorics, geometry and algebra.
The Ehrhart polynomial encodes important information about the polytope such as its volume and the dimension. An important tool to study Ehrhart polynomials is the h*-polynomial, a linear transform of the Ehrhart polynomial which is given by the numerator of the generating series. By a famous theorem of Stanley the coefficients of the h*-polynomial are always nonnegative integers. In this talk, we discuss generalizations of this result to weighted lattice point enumeration in rational polytopes where the weight function is given by a polynomial. In particular, we show that Stanley’s Nonnegativity Theorem continues to hold if the weight is a sum of products of linear forms that a nonnegative over the polytope. This is joint work with Esme Bajo, Robert Davis, Jesús De Loera, Alexey Garber, Sofía Garzón Mora and Josephine Yu.
In this talk we define a new category of matroids, by working on matroid polytopes and rank preserving weak maps. This lets us introduce the concept of categorical valuativity for functors, which can be seen as a categorification of the ordinary valuativity for matroid invariants.
We also show that this new theory agrees with what we know about valuative polynomials: several known valuative polynomials can be seen as a Hilbert series of some graded vector space and we prove that these graded vector spaces let us define a valuative functor in the new sense.
Lastly, we sketch how to categorify a Theorem by Ardila and Sanchez, which states that the convolution of two valuative invariants (respectively, valuative functors) is again valuative.
This is based on a joint ongoing project with Ben Elias, Dane Miyata and Nicholas Proudfoot.
In this talk we define a new category of matroids, by working on matroid polytopes and rank preserving weak maps. This lets us introduce the concept of categorical valuativity for functors, which can be seen as a categorification of the ordinary valuativity for matroid invariants.
We also show that this new theory agrees with what we know about valuative polynomials: several known valuative polynomials can be seen as a Hilbert series of some graded vector space and we prove that these graded vector spaces let us define a valuative functor in the new sense.
Lastly, we sketch how to categorify a Theorem by Ardila and Sanchez, which states that the convolution of two valuative invariants (respectively, valuative functors) is again valuative.
This is based on a joint ongoing project with Ben Elias, Dane Miyata and Nicholas Proudfoot.
Join us for two days of activities and discussions about how we can make our digital products circular through design, repair, and regulation.
- On Thursday, January 25, from 12-16: open house with poster exhibition, taking laptops and mobile phones apart, materials library, and energy visualisation. No registration needed.
- On Friday, January 26, from 10:30-14:30: panel discussions on repair of IT equipment at the University of Oslo and the regulation of repair in Norway, Sweden, and the EU. Please register here if you will participate online (not needed when you participate in person).
We prepared for the seminar a brochure with environmental data on different repair scenarios for mobile phone and laptop, which can be downloaded here.