Approximately n--Jordan derivations: A fixed point approach

Details Approximately n--Jordan derivations: A fixed point approach Approximately n--Jordan derivations: A fixed point approach

2009-08-03

arxiv.org/abs/0908.0295v1

Mathematics

Functional Analysis

Scientific paper

Let $n\in \Bbb N-\{1\},$ and let $A$ be a Banach algebra. An additive map $D: A\to A$ is called n-Jordan derivation if $$D(a^n)=D(a)a^{n-1}+aD(a)a^{n-2}+...+a^{n-2}D(a)a+a^{n-1}D(a),$$ for all $a \in {A}$. Using fixed point methods, we investigate the stability of n--Jordan derivations (n--Jordan $^*-$derivations) on Banach algebras ($C^*-$algebras). Also we show that to each approximate $^*-$Jordan derivation $f$ in a $C^*-$ algebra there corresponds a unique $^*-$derivation near to $f$.

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