Some remarks on acyclicity in bounded cohomology

Marco Moraschini, George Raptis

We show that a surjective homomorphism $\phi :\Gamma \to K$ of (discrete) groups induces an isomorphism $H_b^{\bullet }(K;V)\to H_b^{\bullet }(\Gamma ;{\phi }^{-1}V)$ in bounded cohomology for all d…