On a theorem of Posner for 3-prime near-rings with $(sigma,tau)$ derivation

On a theorem of Posner for 3-prime near-rings with $(sigma,tau)$ derivation

The analog of Posner's theorem on the composition of two derivations in prime rings is proved for 3-prime near-rings with $d_1 a (sigma,tau)$-derivation and $d_2$ a derivation.

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