2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/138387We study the notion of twisting elements $da=a\cup_1a$ with respect to $\cup_1$ product when it is a part of homotopy Gerstenhaber algebra structure. This allows to bring to one context the two classical concepts, the theory of deformation of algebras of M. Gerstenhaber, and $A(\infty)$-algebras of J. Stasheff.24 pagesAlgebraic Topologytext