AUTOMORPHIC-DIFFERENTIAL IDENTITIES OF SEMIPRIME RINGS

Let R be a semiprime ring and S its Martindale left quotient ring. Using V. K. Kharchenko's work, we show that the use of some intermediate ring extension, enable us to solve two questions of J. Bergen on automorphic-differential identities. In this direction, we give a generalization of L. O. Chung and J. Luh's result.