Seminar by Dr. Ishan Banerjee on October 14, 2026 at 11 am

We are very happy to announce the following seminar by Dr. Ishan Banerjee. The details are as follows:

Abstract

Given an algebraic surface X and an embedding of X in Pⁿ, we can construct the family of smooth hyperplane sections of X arising from the embedding. Let Σ denote a fixed hyperplane section; this is a curve of some genus g. The above family of curves induces a monodromy representation, with target the mapping class group of Σ.

In the case when X is simply connected and the embedding is sufficiently ample, we determine that the image of this representation is a finite index subgroup of the mapping class group. This is based on joint work with Nick Salter.