Bonn Topology Group

General Information - Members - Activities - Topology Seminar

This page displays the schedule for the Topology Seminar at the Mathematical Institute.

The seminar takes place on Tuesdays from 5:00 to 6:00 pm, via Zoom. The Meeting-ID will be announced at the start of the semester. If you want to participate, but are not registered in the Bonn topology mailing list, you can receive the credentials by contacting the organiser.
Tea and cookies will be served at home, if you are lucky, but the Zoom-session should be available at least 30 minutes in advance to chat.
The program of previous semesters is here. If you are interested in giving a talk or want to suggest a speaker, please contact the organiser.


  • April 20th, 2021
    Mauricio Bustamante (University of Cambridge, England): Diffeomorphisms of solid tori
  • April 27th, 2021
    Mikala Ørsnes Jansen (Københavns Universitet, Denmark): The reductive Borel-Serre compactification and unstable algebraic K-theory
  • May 4th, 2021
    Andrea Bianchi (Københavns Universitet, Denmark): Mapping class groups on configuration spaces and the Johnson filtration
  • May 11th, 2021
    Rune Haugseng (NTNU, Trondheim, Norway): Homotopy-coherent distributivity and the universal property of bispans
  • May 18th, 2021
    Tobias Lenz (RFWU Bonn): G-global algebraic K-theory
  • May 25th, 2021
    no seminar (Pentecost)
  • June 1st, 2021
    Hans-Werner Henn (Université de Strasbourg, France): On Hopkins' Picard groups
  • June 8th, 2021, at 6pm
    Jens Eberhardt (RFWU Bonn): Algebraic K-Theory and Grothendieck-Witt theory in non-additive settings
  • June 15th, 2021
    Rudolf Zeidler (WWU Münster): Scalar and mean curvature comparison via the Dirac operator
  • June 22nd, 2021
    Calista Bernard (Stanford University, Palo Alto, USA): Twisted homology operations
  • June 29th, 2021
    Andrew Blumberg (University of Texas, Austin, USA): Floer homotopy theory and Morava K-Theory
  • July 6th, 2021
    Rita Jiménez Rolland (UNAM, Oaxaca, Mexico): Puncture stability for the cohomology of mapping class groups
  • July 13th, 2021
    Giles Gardam (WWU Münster): Kaplansky's conjectures
  • July 20th, 2021
    Hadrian Heine (Universität Osnabrück): A coalgebra model for p-adic homotopy types