Hosseini, A. (2017). Characterization of $\delta$-double derivations on rings and algebras. Journal of Linear and Topological Algebra (JLTA), 06(01), 55-65.

A. Hosseini. "Characterization of $\delta$-double derivations on rings and algebras". Journal of Linear and Topological Algebra (JLTA), 06, 01, 2017, 55-65.

Hosseini, A. (2017). 'Characterization of $\delta$-double derivations on rings and algebras', Journal of Linear and Topological Algebra (JLTA), 06(01), pp. 55-65.

Hosseini, A. Characterization of $\delta$-double derivations on rings and algebras. Journal of Linear and Topological Algebra (JLTA), 2017; 06(01): 55-65.

Characterization of $\delta$-double derivations on rings and algebras

^{}Department of Mathematics, Kashmar Higher Education Institute, Kashmar, Iran

Abstract

The main purpose of this article is to offer some characterizations of $\delta$-double derivations on rings and algebras. To reach this goal, we prove the following theorem: Let $n > 1$ be an integer and let $\mathcal{R}$ be an $n!$-torsion free ring with the identity element $1$. Suppose that there exist two additive mappings $d,\delta:R\to R$ such that $$d(x^n) =\Sigma^n_{j=1} x^{n-j}d(x)x^{j-1}+\Sigma^{n-2}_{k=0} \Sigma^{n-2-k}_{i=0} x^k\delta(x)x^i\delta(x)x^{n-2-k-i}$$ is fulfilled for all $x\in \mathcal{R}$. If $\delta(1) = 0$, then $d$ is a Jordan $\delta$-double derivation. In particular, if $\mathcal{R}$ is a semiprime algebra and further, $\delta^2(x^2) = \delta^2(x)x + x\delta^2(x) + 2(\delta(x))^2$ holds for all $x\in \mathcal{R}$, then $d-\frac{1}{2}\delta^2$ is an ordinary derivation on $\mathcal{R}$.

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