M. G. Krein, “A remark on a theorem from V. A. Jakubovich article: “The frequency theorem for the case in which the state space and the control space are Hilbert spaces, and its application in certain problems in the synthesis of optimal control. II”' (Sibirsk. Mat. Z. 16 (1975), no. 5, 1081–1102)”, Sibirsk. Mat. Zh., 1977, Volume 18, Number 6,Pages <nobr>1411

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Notes department

A remark on a theorem from V. A. Jakubovich article: “The frequency theorem for the case in which the state space and the control space are Hilbert spaces, and its application in certain problems in the synthesis of optimal control. II”' (Sibirsk. Mat. Z. 16 (1975), no. 5, 1081–1102)

M. G. Krein

UDC: 519.9+517.9

Received: 18.05.1976