Bialynicki-Birula decompositions old and new
ALGEBRAIC GEOMETRY & NUMBER THEORY SEMINAR
Date
Thursday, October 21, 2021 14:00 - 16:00
Speaker
Joachim Jelisiejew (University of Warsaw)
Location
https://mathseminars.org/seminar/AGNTISTA
Series
Seminar/Talk
Tags
Mathematics and CS Seminar, mathematical_seminar_ics
Host
Tamas Hausel
Contact
Url
Bialynicki-Birula decomposition is a powerful tool for analysing a smooth variety with a torus action. In the talk, I will discuss it and recent developments: the generalization to singular varieties and its applications, as well as an analogue of BB decomposition for additive group actions. This last generalization, which is connected to Carrell's rationality conjecture and formal algebraic PDEs, offers several open questions.