Geodesic
Generalized derivations on Lie ideals in prime rings
Czechoslovak Mathematical Journal, Tome 65 (2015) no. 1, pp. 179-190 Cet article a éte moissonné depuis la source Czech Digital Mathematics Library

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Let $R$ be a prime ring with its Utumi ring of quotients $U$ and extended centroid $C$. Suppose that $F$ is a generalized derivation of $R$ and $L$ is a noncentral Lie ideal of $R$ such that $F(u)[F(u),u]^n=0$ for all $u \in L$, where $n\geq 1$ is a fixed integer. Then one of the following holds: \begin {itemize} \item [(1)] there exists $\lambda \in C$ such that $F(x)=\lambda x$ for all $x\in R$; \item [(2)] $R$ satisfies $s_4$ and $F(x)=ax+xb$ for all $x\in R$, with $a, b\in U$ and $a-b\in C$; \item [(3)] $\mathop {\rm char}(R)=2$ and $R$ satisfies $s_4$. \end {itemize} As an application we also obtain some range inclusion results of continuous generalized derivations on Banach algebras.
Let $R$ be a prime ring with its Utumi ring of quotients $U$ and extended centroid $C$. Suppose that $F$ is a generalized derivation of $R$ and $L$ is a noncentral Lie ideal of $R$ such that $F(u)[F(u),u]^n=0$ for all $u \in L$, where $n\geq 1$ is a fixed integer. Then one of the following holds: \begin {itemize} \item [(1)] there exists $\lambda \in C$ such that $F(x)=\lambda x$ for all $x\in R$; \item [(2)] $R$ satisfies $s_4$ and $F(x)=ax+xb$ for all $x\in R$, with $a, b\in U$ and $a-b\in C$; \item [(3)] $\mathop {\rm char}(R)=2$ and $R$ satisfies $s_4$. \end {itemize} As an application we also obtain some range inclusion results of continuous generalized derivations on Banach algebras.
DOI : 10.1007/s10587-015-0167-4
Classification : 16N60, 16W25, 16W80
Keywords: prime ring; derivation; generalized derivation; extended centroid; Utumi quotient ring; Lie ideal; Banach algebra 
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Dhara, Basudeb; Kar, Sukhendu; Mondal, Sachhidananda. Generalized derivations on Lie ideals in prime rings. Czechoslovak Mathematical Journal, Tome 65 (2015) no. 1, pp. 179-190. doi: 10.1007/s10587-015-0167-4

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