Speaker: V Balaji, CMI, Chennai
Time: Monday 12th October 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: 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.The question has
a long history and I will discuss the classical results and discuss the
new difficulties and solutions.