Symplectic groups and Cobordism categories

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• Fabian Hebestreit (Bielefeld)
• Wednesday 19 November 2025, 16:00-17:00
• MR13.

If you have a question about this talk, please contact Oscar Randal-Williams.

In joint work with Land and Nikolaus, we recently computed a large part of the stable cohomology of symplectic groups over the integers. In the talk I will try to explain our approach highlighting two perhaps surprising facts: That we import surgery techniques from differential topology and that it is necessary to include derived symplectic forms to facilitate this.

This talk is part of the Geometry and Topology colloquium series.

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