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On operator nodes and their characteristic functions. (English. Russian original) Zbl 0231.47011

Sov. Math., Dokl. 12, 696-700 (1971); translation from Dokl. Akad. Nauk SSSR 198, 16-19 (1971).

MSC:

47A48 Operator colligations (= nodes), vessels, linear systems, characteristic functions, realizations, etc.
46C99 Inner product spaces and their generalizations, Hilbert spaces
47A05 General (adjoints, conjugates, products, inverses, domains, ranges, etc.)