Sur l'existence des solutions périodiques de l'équation différentielle x + f(x,x')x' + g(x) = p(t)

DOI10.4064/ap-11-2-149-159zbMath0104.06601OpenAlexW758162652MaRDI QIDQ3288266

Z. Opial

Publication date: 1961

Published in: Annales Polonici Mathematici (Search for Journal in Brave)

Full work available at URL: https://eudml.org/doc/208166

zbMATH Keywords

ordinary differential equations

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