2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/63272This is a continuation of a previous paper of same title. The degeneration, i.e. curvature blow-up, of sequences of metrics appoaching the Sigma constant, assumed non-positive, is analysed. The degeneration is related to the sphere decomposition of the 3-manifold M, in case M is sigma-tame.61ppDifferential GeometryGeometric Topologytext