Finitely summable $\gamma$-elements for word-hyperbolic groups

Jean-Marie Cabrera, Michael Puschnigg

We present two explicit combinatorial constructions of finitely summable reduced "Gamma"-elements ${\gamma }_r\in KK(C_r^{\ast }(\Gamma ),\mathbb{C})$ for any word-hyperbolic group $(\Gamma ,S)$ and obt…