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arXiv 0908.0295math.FA
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近似n-Jordan导子:一个不动点方法

Approximately n--Jordan derivations: A fixed point approach

A. Ebadian

摘要:

设$n\in \Bbb N-\{1\},$和$A$是Banach代数.如果对所有$a \in {A}$都有$$D(a^n)=D(a)a^{n-1}+aD(a)a^{n-2}+...+a^{n-2}D(a)a+a^{n-1}D(a),$$,则称一个可加映射$D: A\to A$为n-Jordan导子.利用不动点方法研究了巴拿赫代数($C^*-$代数)上的n-Jordan导子(n-Jordan $^*-$导子)的稳定性.证明了对于$C^*-$代数中的每一个近似$^*-$ Jordan导子$f$,都对应着一个唯一的靠近$f$的$^*-$导子.

英文摘要:

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 $f$.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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