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Effective quasimorphisms on right-angled Artin groups

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NPCW05 - Group actions and cohomology in non-positive curvature

In this talk, I will describe joint work with T. Fernos and M. Forester in which we construct quasimorphisms on right-angled Artin groups that can “see” every nontrivial element. As consequence, there is a uniform lower bound of 1/24 for stable commutator lengths in right-angled Artin groups.

This talk is part of the Isaac Newton Institute Seminar Series series.

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