Speaker: V Balaji, CMI, Chennai
Time: Monday 2nd November 4 to 5pm (joining time 3.45 pm IST)
Google Meet Link:
https://meet.google.com/qvo-kduy-yco
Title: Torsors on semistable curves and the problem of degenerations.
Abstract: This is part 2 of the previous talk. Let G be an almost simple,
simply connected algebraic group over the field of complex numbers. In
this talk I will discuss a basic question in the classification of
G-torsors on curves, which is to construct a flat degeneration of the
moduli stack G-torsors on a smooth projective curve when the curve
degenerates to an irreducible nodal curve. In this second part I will
discuss the problem addressed earlier in the setting of principal G
bundles for an almost simple algebraic group. We will recall the earlier
picture for the sake of continuity.