Unitary couplings, scattering suboperato
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S. S. Boiko; V. K. Dubovoy
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Article
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2005
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John Wiley and Sons
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English
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## Abstract In the paper bilateral shifts are studied which generate factorizations of unitary couplings (in the system theory they play the part of channels). Subspaces of __L__^2^(๐), reducing the multiplication operator by __e__^__it__^, are investigated in the channel language. New criteria for