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most citedThe Minimal Genus of Homology Classes in a Finite 2-Complex

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math.GR2025

Non vanishing of the fourth bounded cohomology of free groups and codimension 2 subspaces

Thorben Kastenholz

In this note we prove that the fouth bounded cohomology of non-abelian free groups with trivial real coefficients is non-zero. In order to prove this, we establish a splitting argu…