2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/61116A large class of positive finite presentations of the braid groups is found and studied. It is shown that no presentations but known exceptions in this class have the property that equivalent braid words are also equivalent under positive relations.21 pages, 26 figures, to appear in Math. ZGeometric TopologyGroup Theory57M25; 57M15; 20F36; 05C25text