2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/129599We prove that pure braid groups of closed surface are almost-direct products of residually torsion free nilpotent groups and hence residually torsion free nilpotent. As a Corollary, we prove also that braid groups on 2 strands of closed surfaces are residually nilpotent.Group Theory20F36text