2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/137540We discuss the crossed product by the dual action of the circle on the crossed product of a C*-algebra A by a Hilbert C*-bimodule X. When X is an A-A Morita equivalence bimodule, the double crossed product is shown to be Morita equivalent to the C*-algebra A.16 pagesOperator Algebras46L08text