scientific article; zbMATH DE number 3286522
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Publication:5569864
zbMATH Open0179.20403MaRDI QIDQ5569864
Publication date: 1967
Title of this publication is not available (Why is that?)
Cauchy problemminimax methodseparable Hilbert spacealmost periodic solutionsself-adjoint positive operatormethod of harmonic analysismethod of integral energy
Nonlinear differential equations in abstract spaces (34G20) General theory of ordinary differential operators (47E05) Almost and pseudo-almost periodic solutions to ordinary differential equations (34C27)
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