Here you will find the list of upcoming speakers
2026-11-02 : Ronan Terpereau (Universite de Lille).
Title: Equivariant automorphism groups and real forms of complexity-one varieties
Abstract: Let G be a connected reductive algebraic group over a perfect field. I will discuss the representability of equivariant automorphism groups of certain G-varieties. More precisely, for a broad class of G-varieties, called G-varieties of complexity one, I will explain why this group is representable by a group scheme locally of finite type, and even by a linear algebraic group in the almost homogeneous case. Finally, I will show how understanding the equivariant automorphism group, particularly through a description in terms of an exact sequence, allows us to address the question of the finiteness of real forms of G-varieties of complexity one. This is joint work with Giancarlo Lucchini Arteche (arXiv:2507.18475).
2026-12-07 : Hendrik Suess (Universitaet Jena).
Title: Equivariant Milnor fillings for non-standard constant structures on lens spaces
Abstract: For some non-standard contact structures on lens spaces we realise every minimal symplectic filling as the Milnor fibre of some non-normal toric surface singularity. This is joint work with Shahryar Ghaed Sharaf.
2027-01-04 : Mikhail Zaidenberg (Université de Grenoble).
Title: TBA
Abstract: TBA.
2027-02-01 : Algebraic Transformation Groups Day.
10:30 -- 11:30 Shigeru Kuroda
11:45 -- 12:45 Neena Gupta
14:15 -- 15:15 Ivan Cheltsov
15:30 -- 16:30 Lukas Braun
17:00 -- 18:00 Mohamed Ali Belabbas