((σ,t) – (U,R) – DERIVATIONS ON PRIME RINGS

Let R be an associative ring with center Z(R). A well known results proved by Bell and kappe concreing derivations in prime rings have been extensively studied by many authors, several of these outhers extended these results for a - derivation like Yenigual and Argac and some of them extended these results for a (s,t) – derivations like M. Asharf. The main purpose of this paper is to study the action of a (s,t) – (U,R) – derivation and a left (s,t) – (U,R) – derivation on lie ideals