2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/110031This note gives a generalization of spherical twists, and describe the autoequivalences associated to certain non-spherical objects. Typically these are obtained by deforming the structure sheaves of (0,-2)-curves on threefolds, or deforming $\mathbb{P}$-objects introduced by D.Huybrecht and R.Thomas14pagesAlgebraic Geometry18E30, 14J32text