Titlebook: Convolution Operators and Factorization of Almost Periodic Matrix Functions; Albrecht Böttcher,Yuri I. Karlovich,Ilya M. Spitko Book 2002

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Changing requirements for work performances obviously invertible on (R). We here prove that the converse is also true, that is, the symbol a necessarily has a canonical right APW factorization if W (a) is invertible. The proof of this result requires some heavy tools. We first establish an isomorphism theorem for C*-dynamical systems, which

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