A characterization of relatively hyperbolic groups via bounded cohomology

Federico Franceschini

It was proved by Mineyev and Yaman that, if $(\Gamma ,{\Gamma }^{\prime })$ is a relatively hyperbolic pair, the comparison map $$H_b^k(\Gamma ,{\Gamma }^{\prime };V)\to H^k(\Gamma ,{\Gamma }^{\prime };V)$$ is surjective for every $k\ge 2$,…