Jordan *-derivation pairs and quadratic functionals on modules over *-rings. (Summary).
On centralizers of semiprime rings
Let be a semiprime ring and an additive mapping such that holds for all . Then is a left centralizer of . It is also proved that Jordan centralizers and centralizers of coincide.
On the structure of Jordan *-derivations
An application of the Sakai's theorem to the characterization of - algebras.
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