Group cohomology and $L^p$-cohomology of finitely generated groups

Let $G$ be a finitely generated, infinite group, let $p>1$, and let $L^p(G)$ denote the Banach space ${\sum_{x\in G} a_xx \mid \sum_{x\in G} |a_x |^p < \infty }$\mathrm{.}Inthispaperwewillstudythefirstcohomologygroupof$G$ with coefficients in $L^p(G)$, and the first reduced $L^p$-cohomology space of $G$. Most of our results will be for a class of groups that contains all finitely generated, infinite nilpotent groups.