Divisorial contractions to codimension three orbits
25 Feb 2020
•
Samuel Boissière
•
Enrica Floris
Let $G$ be a connected algebraic group. We study $G$-equivariant extremal contractions whose centre is a codimension three $G$-simply connected orbit...In the spirit of an important result by Kawakita in 2001, we prove that those contractions are weighted blow-ups.(read more)