本文给出C＊-代数之间完全正映射的刻画，证明：如果A，B是有单位元的C·-代数，则映射西：A→B为完全正映射当且仅当存在保单位·-同......

The theory of crossed products of C*-algebras by groups of automorphisms is a well-developed area of the theory of opera......