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DMS Topology & Geometry Seminar - IISER Kolkata

Autumn 2026

Welcome to the Topology and Geometry Seminar at IISER Kolkata! Our seminars focus on the latest developments and cutting-edge research in topology and geometry, as well as related areas of mathematics. Seminars are open to all and may be held offline or online. While there is no fixed schedule, please check back frequently for updates. Join mailing group (or if you want to give a talk) for the latest seminar schedule and format updates. Stay connected with our community and don't miss out on exciting events. Thank you for your interest in the Topology and Geometry Seminar at IISER Kolkata! An archive of previous talks can be found in the following links: Spring 2023, Autumn 2023, Spring 2024, Autumn 2024, Spring 2025, Autumn 2025, Spring 2026.

Upcoming Talks

  • Published on

    Monodromy and vanishing cycles for curves in a simply connected surface.
    Ishan Banerjee (The Ohio State University, USA)

    I will describe some joint work with Nick Salter in understanding the monodromy group associated to a complete linear system of curves in some smooth projective surface X. We prove that if X is simply connected and the linear system is sufficiently ample, then the monodromy group is of finite index in the mapping class group. I will try to be fairly concrete throughout the talk, in particular I will define the terms 'monodromy' and 'mapping class group'. I will also mostly focus on the concrete case of plane curves throughout the talk.

    Date: Friday (14th August 2026)
    Time: 11:45 am
    Venue: LHC 110

Previous Talks