Bi-Additive s-Functional Inequalities and Quasi-∗-Multipliers on Banach Algebras

Abstract

Using the fixed point method, we prove the Hyers-Ulam stability of quasi-∗-multipliers on Banach ∗-algebras and unital C*-algebras, associated to bi-additive s-functional inequalities.

Keywords

• quasi-multiplier on C*-algebra
• quasi-∗-multiplier on Banach algebra
• Hyers-Ulam stability
• fixed point method
• bi-additive s-functional inequality