Semiorthogonal decompositions of the categories of equivariant coherent sheaves for some reflection groups
This seminar is based on an article with the same name by Polishchuk and van den Bergh [PvdB]. While the motivating problem (categorify the canonical direct sum decomposition of the orbifold cohomology) and the main results of the paper are very nice and easy to explain, the actual construction of the semi-orthogonal decompositions is technical and heavily uses the Springer correspondence.Talks
The seminar will take place in room F128 at the Leibniz Universität Hannover on Saturday, July 9, 2016.
- 10:15 – 11:30
Andreas Krug: Semiorthogonal decompositions of the categories of equivariant coherent sheaves for some reflection groups [PvdB] - 11:45 – 13:00
Jörg Schürmann: A reminder on perverse sheaves - 14:30 – 15:45
David Ploog: Springer resolution and Springer sheaf [C, Section 2] - 16:00 – 17:15
Lutz Hille: Springer functor and Springer correspondence [C, Section 3 & 4]
If you want to be kept informed, please write an email.
Literature
[C] The Springer Correspondence by D. Clausen.[PvdB] Semiorthogonal decompositions of the categories of equivariant coherent sheaves for some reflection groups by A. Polishchuk and M. van den Bergh.