Institut for Matematik og Datalogi

Dagens oplægsholdere er: Thomas R. S. Albrechtsen med oplægget:Knowledge Ecology in NAFAog Niels Bonderup Dohn med oplægget:Elevers interesse for naturfagAlle er velkomne.På FNUG Forskningsseminarer mødes forskere og studerende om videndeling og udvikling af forskning inden for temaerne fagdidaktik, forskningsperspektiver på undervisningsudvikling på videregående uddannelsesniveau, STEM uddannelse, videnskabskommunikation, læremidler, professionsudvikling og uddannelsesinnovation.

Speaker: Jiahe Cai, University of Copenhagen Abstract: Let G be a finite group. By evaluation of a once-extended 3-2-1-dimensional G-equivariant topological field theory Z on the circle one obtains a G-ribbon category C. From a homotopy G-fixed point in this G-ribbon category C, we can construct two representations of framed braid groups fBn with n strands for any n ≥ 1: 1) We can construct a representation of fBn by evaluating Z on genus zero surfaces with G-bundle decoration. 2) We can orbifoldize the G-ribbon category C and obtain the fBn representation algebraically by using the braiding and twist of the orbifold category. We prove that these two representations are equivalent.

Speaker: Marco Volpe (MPIM Bonn) Abstract: Poincaré and Atiyah duality theorems are fundamental results in the study of the (co)homology of smooth manifolds. However, due to their purely cohomological nature, one may naturally wonder whether it is necessary to impose geometric conditions on a topological space to ensure the validity of these theorems. In this presentation, we will review and reinterpret both Poincaré and Atiyah duality theorems using the framework of sheaves of infinity categories. We will employ the formalism of six operations to extend these duality theorems beyond the realm of manifolds. Even more, we will provide a comprehensive characterization of the class of topological spaces that satisfy Poincaré and Atiyah duality. This class essentially consists of what are known as integral homology manifolds. This is a joint work with Markus Land.

Hør om økodannelse i uddannelsessektoren til NiSE den 10. oktober.Der er oplæg af:Katrine Bergkvist Borch, Ph.d.-stipendiat ved Forskningscenter for Naturvidenskabelig Uddannelse og Formidling på SDU:Wicked Heritage - eksemplificeret med sanseudstillingen 'Havet'Dorte Ruge, Lektor ved læreruddannelsen og Ph.d., Seniorforsker, Center for Anvendt Skoleforskning, UCL Erhvervsakademi og Professionshøjskole:'Undervisning for Bæredygtig Udvikling på læreruddannelsen - cases for UCL University College og perspektiver på 2023 bekendtgørelse'Martin Hauberg Lund Laugesen, Postdoc ved Institut for Medier, Design, Læring og Erkendelse på SDU:Økodannelse i grundskolen: Om klima-, miljø- og bæredygtighedsundervisning i den kapitalocæne epokeAfsluttende plenum ved Martin Hauberg Lund Laugesen og Gitte Miller Balslev:Fokus på skoleorganisering og ledelseGitte Miller Balslev, Centerleder af CESE, Center of Excellence in Science Education ved Københavns Professionhøjskole og Lektor i Uddannelsesinnovation ved Forskningscenter for Naturvidenskabelig Uddannelse og Formidling på SDU, er moderator.Mødet er online, og alle er velkomne.

Kom og hør et oplæg om SDU’s supercomputer – der stadig står i kælderen – og har du spørgsmål om hardware, så er systemadministrator Erik Madsen, nok også frisk på at svare på det. Alle studerende og undervisere er velkomne. Vi sørger for kage. Tilmelding ikke nødvendig.

Speaker: Saebyeok Jeong (Department of Theoretical Physics, CERN) Abstract: TBA

Vil du vide, hvad der foregår bag kulisserne hos IMADA? Kom og vær med til 2 x 20 min. inspirerende foredrag, mens du nyder en gratis "afslappet after-work" øl med dine medstuderende, kollega eller lærer. Ved dette IMADA Talks kan du møde adjunkt Kristin Courtney og adjunkt Dorte Moeskær Larsen.

Speaker: Hannah Dell (University of Edinburgh) Abstract: The space of Bridgeland stability conditions on a given triangulated category is a complex manifold, which gives us a way to extract geometry from homological algebra. An explicit description is only known in a few cases. In this talk, I will discuss two approaches to studying stability conditions on derived categories of surfaces that are free quotients by finite abelian groups. One method is via Le Potier functions, which characterise the existence of slope-semistable sheaves. The second method uses Deligne’s notion of group actions on triangulated categories to describe a connected component of so-called geometric stability conditions inside the stability manifold of these free abelian quotients when the cover has finite Albanese morphism. A consequence of this is a disproof of the expectation that surfaces with irregularity 0 always admit a wall of the geometric chamber. This is based on arXiv:2307.00815.

Speaker: Pavel Putrov (ICTP) Abstract: I will present a finite-dimensional model for analytically continued Chern-Simons theory on closed 3-manifolds that are described by plumbing trees. From this model, one can define a collection of topological invariants labeled by pairs of flat connections and valued in formal power series with integral coefficients. The coefficients can be roughly interpreted as counting gradient descent flows with respect to Chern-Simons functional in the space of SL(2,C) connections on the 3-manifold. I will also comment on a possible categorification, which can be interpreted as a finite-dimensional model of Fukaya-Seidel category of Chern-Simons functional on the space of SL(2,C) connections.

UCloud is a powerful interactive digital research environment, which provides an intuitive graphical user interface to give easy access to interactive high-performance computing and tools. Advantages for students include: • cloud services (compute and storage) accessible via every type of device, from workstations to laptops and tablets, no need of local software installation • data can be shared in project workspaces, with restricted access to computational resources and teaching materials • high performance computing can be performed at all the level of expertise • easy to share data with collaborators, class mate, teachers in secure virtual environments • support from eScience Center In this seminar Federica Lo Verso will give a basic introduction to UCloud, including how to access the platform, the softwares and manage files and folders.

Speaker: Paolo Ghiggini (Université Grenoble Alpes) Abstract:

Speaker: Zhengping Gui (ICTP) Abstract: We construct a trace map on the chiral homology of chiral Weyl algebra for any smooth Riemann surface. Our trace map can be viewed as a chiral version of the deformed HKR quasi-isomorphism. This also provides a mathematical rigorous construction of correlation function for symplectic bosons in physics. We calculate some examples of trace maps with one insertion and find they are closely related to the variation of analytic torsion for holomorphic bundles on Riemann surfaces.

Informationsmøde om forårets valgfrie kurser i lokalerne U170, U171, U172 og U173. Pizzareservation Tilmelding til pizzamødet er IKKE nødvendig, men hvis du vil have en gratis pizza og sodavand, skal du tilmelde dig på: www.sdu.dk/imadapizza Der er tilmeldingsfrist for pizza torsdag d. 2. november.

Tobias Greisager Rehfeldt forsvarer sin ph.d.-afhandling:“Application of deep learning methods on publicly available mass spectrometry-based proteomics data” ved et offentligt foredrag. Professor Ole Nørregaard Jensen vil være ordstyrer ved arrangementet.

Speaker: David O'Connell (University of Okinawa) Abstract: TBA

Vil du vide, hvad der foregår bag kulisserne hos IMADA? Kom og vær med til 2 x 20 min. inspirerende foredrag, mens du nyder en gratis "afslappet after-work" øl med dine medstuderende, kollega eller lærer. Ved dette IMADA Talks kan du møde lektor Luís Cruz-Filipe og lektor Du Pei.

Speaker: Yu Zhao (IPMU) Abstract: TBA

Speaker: Ingmar Saberi (Ludwig-Maximilians-Universität München ) Abstract: TBA

Speaker: Fei Yan (Rutgers University) Abstract: TBA

Speaker: Charlotte Kirchhoff-Lukat (KU Leuven) Abstract: TBA

Speaker: Guillem Cassasus (QM, SDU) Abstract: TBA

Speaker: Alexander Stottmeister (University of Hannover) Abstract: TBA

Vil du vide, hvad der foregår bag kulisserne hos IMADA? Kom og vær med til 2 x 20 min. inspirerende foredrag, mens du nyder en gratis "afslappet after-work" øl med dine medstuderende, kollega eller lærer. Ved dette IMADA Talks kan du møde lektor Stefan Jänicke og postdoc Konstantin Wernli.