2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/116520In this paper we describe graded automorphisms and antiautomorphisms of finite order on matrix algebras endowed with a group gradings by a finite abelian group over an arbitrary algebraically closed field of charcteristic different from 2.Rings and Algebras17B20, 17B40, 16W10, 16W50text