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Bounded cohomology and displacement
Speaker: Francesco Fournier-Facio


Bounded cohomology is a functional-analytic analogue of group cohomology that is central to rigidity theory, dynamics, geometric topology, and geometric group theory. A major drawback is the failure of excision, which renders even basic computations currently out of reach.

One of the few cases where non-trivial computations are possible is transformation groups with certain displacement properties that are classically used in homology and stable commutator length. I will introduce a new algebraic criterion that captures this, is satisfied in many interesting settings, and implies vanishing in all degrees and with a large class of coefficients.

Joint with Caterina Campagnolo, Yash Lodha, and Marco Moraschini


To see the schedule of the RTG Day in Karlshure, go to:


Date : Tue, Apr 23

Time: 09:45