Linear -Derivations on C-Algebras

[[abstract]]It is shown that every almost linear almost -derivation h : A ! A on a unital C-algebra, JC-algebra, or Lie C-algebra A is a linear -derivation when h(rx) = rh(x) (r > 1) for all x 2 A. We moreover prove the Cauchy–Rassias stability of linear -derivations on unital C-algebras, on unital JC-algebras, or on unital Lie C- algebras