Abstract
If F,D:R -> R are additive mappings satisfyingF(xnyn)=alpha(xn)F(yn)+beta(yn)D(xn) for all x,y is an element of R, where alpha,beta are automorphisms on R, then F becomes generalized left (alpha,beta)-derivation with associated Jordan left (alpha,beta)-derivation D on R under suitable torsion restriction.