The Stavanger Algebraic Geometry Seminar

Spring 2015: The seminar takes place on Wednesdays 9:15-11:00 (at most) in room E541 in the Kjølv Egeland building. When nothing else (guests) is on, we will be reading Newstead's book Introduction to Moduli Problems and Orbit Spaces

Wednesday May 13: Martin G. Gulbrandsen

The dual cell complex of a Hilbert scheme degeneration

Tuesday April 28: Michał Kapustka

EPW cubes

Wednesday April 22: Sammy Alaoui Soulimani

Newstead's book: Chapter 5 (IV)

Wednesday April 15: Sammy Alaoui Soulimani

Newstead's book: Chapter 5 (III)

Wednesday April 8: Martin G. Gulbrandsen

Newstead's book: Chapter 5 (II)

Wednesday March 25: Martin G. Gulbrandsen

Newstead's book: Chapter 5 (I)

Wednesday March 18: Sammy Alaoui Soulimani

Newstead's book: Chapter 4 (II)

Wednesday March 4: Michal Kapustka (NB! 9:15-11:00)

Newstead's book: Chapter 4

Wednesday February 25: Wanmin Liu (Hong Kong UST)

Bayer-Macri decomposition on Bridgeland moduli spaces over surfaces

Bayer and Macri etablished a determinant line bundle theory on the Bridgeland moduli space over surface, which induced birational geometry of the moduli space via wall-crossing of stability conditions. We find a decomposition of the local Bayer-Macri map and obtain its image in the Neron-Severi group of the moduli space. The geometric meaning of the decomposition is given. As application, we obtain a precise correspondence between Bridgeland walls and Mori walls. Some toy models on Hilbert scheme of points will be discussed.

Monday February 9: Grzegorz Kapustka (Jagiellonian University)

20 planes and IHS 4-folds

Martin G. Gulbrandsen