Семинар Лаборатории алгебраической геометрии: Манфред Ленн

На семинаре Лаборатории Алгебраической Геометрии
 выступит Манфред Лен.

Manfred Lehn (Mainz)
Symplectic hypersurfaces

 We expect hypersurface singularities that carry a holomorphic
 symplectic structure to be a rare phenomenon. If one imposes
 natural technical conditions like equivariance of all data with
 respect to a C*-action with strictly positive weights, the only
 known hypersurfaces are: 1. ADE-singularities, 2. a series of
 4-dimensional examples and 3. a single 6-dimensional exmaple.
 All of these arise as Slodowy slices to nilpotent orbits in
 simple Lie algebras. We will also describe alternative constructions
 that lead to the same singularities. This is joint work with
 Yoshinori Namikawa, Christoph Sorger and Duco van Staten.

место и время как всегда:
пятница, 25 сентября, 17:00, комната 1001.