Sumanta Das


Invited Talks:

  • 30 Jan 2025. The Goldman bracket characterizes homeomorphisms between non-compact surfaces. DMS Topology & Geometry seminar, IISER Kolkata.
  • 29 Jan 2025. Topological rigidity of two- and three-dimensional manifolds. DMS Colloquium, IISER Kolkata.
  • 26 July 2024. Strong topological rigidity of non-compact orientable surfaces. Topology Seminar, IIT Bombay.
  • 11 Sep 2023. Strong topological rigidity of non-compact orientable surfaces. Prospectos en Topología, CCM UNAM, México.
  • 10 Feb 2023. Surfaces of infinite type are non-Hopfian. Geometry & Topology Seminars (GaTs), IISER Bhopal.

Contributed Talks:

  • 6 Oct 2025. Proper homology in the spirit of Brown's proper homotopy theory. Topology Seminar, IIT Bombay.
  • 12 Sep 2025. Geometric kernels of proper maps between non-compact surfaces. Geometry and Topology Seminar, IIT Bombay.
  • 6 Mar 2025. Strong topological rigidity of orientable infinite-type surfaces. New Trends in Teichmüller Theory, ICTS, Bangalore.
  • 31 Jan 2023. The Lusternik-Schnirelmann category. Prime Time Seminars, Department of Mathematics, IISc.
  • 24 Nov 2022. Strong topological rigidity of non-compact orientable surfaces. Postdoc-Student Symposium, Department of Mathematics, IISc.

Service:

I was a co-organizer of Students' Topology & Geometry Seminars. Also, I developed and currently maintain its website: https://stgsiisc.github.io/.