Document Zbl 0222.47011

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J. Fac. Sci. Univ. Tokyo, Sect. I A 17, 241-258 (1970).

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scan of Zbl 0222.47011

47D06	One-parameter semigroups and linear evolution equations
47D03	Groups and semigroups of linear operators
35R20	Operator partial differential equations (= PDEs on finite-dimensional spaces for abstract space valued functions)

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