Products of generalized derivations on rings

S. R. Behresi, M. J. Mehdipour

In this paper, we show that if the product $(D_1{D}_2,d_1{d}_2)$ of generalized derivations $(D_1,d_1)$ and $(D_2,d_2)$ on an algebra $A$ is a generalized derivation, then $d_1{D}_2$…