School of Mathematics Colloquium

Betti bounds of polynomials

by Prof. Tibar Mihai-Marius (University of Lille-1, France)

Asia/Kolkata
AG-69 (Colaba Campus)

AG-69

Colaba Campus

Description
We initiate a classification of polynomial functions $f : {\mathbb C}^n \to {\mathbb C}$ of degree d having the top Betti number of the general fibre close to the maximum. We find a range in which the polynomial must have isolated singularities and another range where it may have at most one line singularity of Morse transversal type. Our method uses deformations into particular pencils with non-isolated singularities. This is a joint work with Dirk Siersma.