Friday Fish Seminar | This is the official website for the Friday Fish seminar hosted at Utrecht University. The Friday Fish is a weekly seminar on differential geometry which has been taking place in Utrecht since 2004. At the moment, the seminar deals in general with differential geometry and topology.

Welcome to the website to the Friday Fish seminar at Utrecht University. On this site you can find announcements for upcoming talks, our previous talks, and the reading seminars we are hosting and have hosted.

If you want to add upcoming talks to your calendar, you can use the following iCalandar-link.

Upcoming Talks

March 27, 2026
Jakob Hedicke - Orderability in Contact Geometry
Time: 15:00 — Location: HFG 707
April 10, 2026
Bas Wensink - TBA
Time: 15:00 — Location: HFG 707
April 24, 2026
Douwe Hoekstra - TBA
Time: 15:00 — Location: HFG 707
May 29, 2026
Lucas Dahinden - TBA
Time: 15:00 — Location: HFG 707

Previous Talks

March 13, 2026
Alba Sendón Blanco - Cobordism of nested manifolds
Video
March 6, 2026
Gil Cavalcanti - Iterated sphere bundles, Massey products and T-duality
Video
February 27, 2026
Rui Loja Fernandes - Polar groupoids and their resolutions
Video
February 27, 2026
Aldo Witte - Poisson geometry of the space of truncated polynomials
Video
February 20, 2026 | Seiberg-Witten theory (Fall 2025)
Bas Wensink - Surgeries, Seiberg-Witten and smooth structures
Video