2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/167378We introduce the concept of a strongly t-logarithmic t-generating set for a Z[t,t^{-1}]-module, which enables us to prove that a large class of soluble groups are not almost convex. We also prove some results about dead-end depth.34 pagesGroup Theory20F16 (Primary) 20F65 (Secondary)text