On the Stability of Quadratic (∗-) Derivations on (∗-) Banach Algebras
Abasalt Bodaghi, Gholamreza Zabandan
Abstract
The stability of quadratic derivations on a Banach algebra is established. The stability and the superstability of quadratic ∗-derivations on Banach ∗ -algebras are proved as well. In fact, it is modified the result of Jang and Park [1] on a quadratic ∗-derivation.