2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/116521We define two complexes on which the group Aut$(F_n)$ acts freely. The homotopy groups of these are studied. They map to the K-groups of Z and are themselves a sort of pre-K-theory.98 pages, 64 figuresK-Theory and HomologyGroup Theory20F28text