Topology Seminar

Date and time: Thursday 30 March 2023 at 10 AM

Venue: Video call link: https://meet.google.com/faa-xzqt-xyn

Host: Rekha Santhanam

Speaker:  Bikramjit Kundu 

Affiliation: ISI Bangalore

Title: The index of some Stiefel and flag manifolds

Abstract:  In this talk I will do the Fadell-Husseini index calculations for certain
group actions on Stiefel manifolds and flag manifolds. The calculations for the
Stiefel manifold are related to generalizations of the Kakutani’s theorem in geom-
etry. I will also briefly discuss index of flag manifolds of equal dimensional p orthogonal
subspaces on which C_p acts by the cyclic permutation. The result bears geometric consequences about
measures of orthogonal shadows of convex subsets. This is an odd primary ana-
logue of a calculation of Blagozevic et al for the Grassmannian.

Commutative algebra seminar

4 pm on Thursday, 30 March, 2023

=========================

Venue: Ramanujan Hall

Host: Tony Puthenpurakal

Speaker: Manoj Keshari

Affiliation: IIT Bombay

Title: On complete intersection ideals

Abstract: I will give a survey on the problem of complete intersection 
ideals in a polynomial ring