Unitary Colligations, Reproducing Kernel
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Joseph A Ball; Tavan T Trent
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Article
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1998
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Elsevier Science
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English
⚖ 669 KB
Recently J. Agler studied the class S d of scalar-valued, analytic functions of d complex variables f for which f (T 1 , ..., T d ) has norm at most 1 for any collection of d commuting contractions (T 1 , ..., T d ) on a Hilbert space H. Among other results he obtained a characterization of such fun