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LIE IDEALS AND DERIVATIONS OF $\sigma$-PRIME RINGS  

Shuliang, Huang (DEPARTMENT OF MATHEMATICS, CHUZHOU UNIVERSITY)
Publication Information
The Pure and Applied Mathematics / v.17, no.1, 2010 , pp. 87-92 More about this Journal
Abstract
Let R be a 2-torsion free $\sigma$-prime ring with an involution $\sigma$, U a nonzero square closed $\sigma$-Lie ideal, Z(R) the center of Rand d a derivation of R. In this paper, it is proved that d = 0 or $U\;{\subseteq}\;Z(R)$ if one of the following conditions holds: (1) $d(xy)\;-\;xy\;{\in}\;Z(R)$ or $d(xy)\;-\;yx\;{\in}Z(R)$ for all x, $y\;{\in}\;U$. (2) $d(x)\;{\circ}\;d(y)\;=\;0$ or $d(x)\;{\circ}\;d(y)\;=\;x\;{\circ}\;y$ for all x, $y\;{\in}\;U$ and d commutes with $\sigma$.
Keywords
$\sigma$-prime ring; derivation; $\sigma$-Lie ideal;
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