David Rydh: Canonical reduction of stabilizers for stacks with good moduli spaces
Time: Wed 2018-02-21 13.15 - 14.15
Location: Room 306, House 6, Kräftriket, Department of Mathematics, Stockholm University
Participating: David Rydh (KTH)
Some natural moduli problems give rise to stacks with infinite stabilizers. I will report on recent work with Dan Edidin where we give a canonical sequence of saturated blow-ups that makes the stabilizers finite. This generalizes earlier work in GIT by Kirwan and Reichstein, and on toric stacks by Edidin–More. Time permitting, I will also mention a recent application to
generalized Donaldson–Thomas invariants by Kiem–Li–Savvas.