2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/108858We investigate the behaviour of Rasmussen's invariant $s$ under the sharp operation on knots and obtain a lower bound for the sharp unknotting number. This bound leads us to an interesting move that transforms arbitrary knots into non-alternating knots.5 pages, 3 figures, one remark addedGeometric Topology57M25text