文摘
Let \(R\) be a prime ring, \(L\) a noncentral Lie ideal of \(R\) , \(F\) a generalized derivation with associated nonzero derivation \(d\) of \(R\) . If \(a\in R\) such that \(a(d(u)^{l_1} F(u)^{l_2} d(u)^{l_3} F(u)^{l_4} \ldots F(u)^{l_k})^{n}=0\) for all \(u\in L\) , where \(l_1,l_2,\ldots ,l_k\) are fixed non negative integers not all are zero and \(n\) is a fixed integer, then either \(a=0\) or \(R\) satisfies \(s_4\) , the standard identity in four variables.