For a Noetherian local domain $R$ let $R^+$ be the absolute integral closure of $R$ and let $R_{ \infty}$ be the perfect closure of $R$, when $R$ has prime characteristic. In this paper we investigate the projective dimension of residue rings of certain ideals of $R^+$ and $R_{ \infty}$. In particular, we show that any prime ideal of $R_{ \infty}$ has a bounded free resolution of countably generated free $R_{ \infty}$-modules. Also, we show that the analogue of this result is true for the maximal ideals of $R^+$, when $R$ has residue prime characteristic. We compute global dimensions of $R^+$ and $R_{ \infty}$ in some cases. Some applications of these results are given.
Categories: math.AC