On the stability of J${}^{\ast }-$derivations

M. Eshaghi Gordji, S. Shams, A. Ebadian +1

In this paper, we establish the stability and superstability of $J^{\ast }-$derivations in $J^{\ast }-$algebras for the generalized Jensen--type functional equation $$rf(\frac{x+y}{r})+rf(\fra…