Hilbert schemes of points for a surface are a well studied subject with many famous results like Göttsche’s formula for its Betti numbers. A natural generalization comes from studying Grothendieck’s Quot-schemes and the associated enumerative invariants. Unlike the former, punctual Quot-schemes are smooth only virtually admitting perfect obstruction theories and virtual fundamental classes. This has recently been used to study invariants counting zero-dimensional quotients of trivial vector bundles by multiple authors who used virtual localization and therefore could not treat the case of a general vector bundle. We rely on other techniques which use a general wall-crossing framework of D. Joyce to study these. Our methods rely on existence of a Lie algebra coming from vertex algebras constructed out of topological data. I will explain how these arise naturally in the Quot-scheme setting and how one can obtain explicit invariants and study their symmetries.

REAL Gruppelærerstart

Tid og stad: 20. jan. 2022 16:15–18:00, zoom-lenke

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Et godt læringsmiljø legger grunnlaget for læring, og gruppelærerne har en viktig rolle for å bidra til å skape dette læringsmiljøet. Nå får gruppelærerne sin egen kick-start på semesteret!

21 jan.

Mastereksamen: Knut Hauge Engvik

Tid og stad: 21. jan. 2022 09:30, Seminarrom 4512, Kristine Bonnevies hus

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Applications of k-mer count tables in community ecology

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Shut up & write - digital meetup!

Tid og stad: 21. jan. 2022 10:00–14:00, Zoom: Academic Writing Centre

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Is it difficult to set aside time to write? The Academic Writing Centre arranges joint, structured “Shut Up & Write” sessions.

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STAR seminar: Gabriel J. Lord

Tid og stad: 21. jan. 2022 11:00–12:00, Online

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Njord Seminar with Kristina Dunkel

Tid og stad: 21. jan. 2022 14:00–15:00, https://uio.zoom.us/j/61687425496

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Njord Seminar with Kristina Dunkel (University of Oslo): Earthquakes in the lower crust - origins and consequences

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Mastereksamen: Charlotte Aurora Schmedling

Tid: 24. jan. 2022

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Licence to Krill: Diel Vertical Migration and the Predator-Prey Interaction between Meganyctiphanes norvegica and Fish in the Oslofjord

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Producing Speed on Demand: Reconfiguration of Space and Time in Food Delivery Platform Work

Tid og stad: 25. jan. 2022 10:15–11:45, zoom

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Research Seminar Series features, Yingqin Zheng, Senior Lecturer at Centre for Research into Sustainability, School of Business and Management, Royal Holloway, University of London, UK

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Tuesday talk for CBA members: Andrea Popp and Nicolas Valiente Parra

Tid og stad: 25. jan. 2022 12:00–13:00, Zoom

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Every second Tuesday, CBA staff gather for lunch and a talk. On January 25h 2022, it will be given by two CBA postdocs. Titl: Integrating hydrology and biogeochemistry in the high Arctic.

SPARK Norway Educational Forum

Tid og stad: 26. jan. 2022 17:00–19:00, Forskningsparken / Zoom

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SPARK Norway Educational Forum are monthly open meetings organized by UiO:Life Science and SPARK Norway partners.

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CANCELLED - dScience Lunch Seminar: Norbert Pirk

Tid og stad: 27. jan. 2022 11:45–13:00, The Science Library

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Cancelled due to the ongoing Covid-19 situation.

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