The number of subharmonic solutions of non-linear differential equations of the second order

DOI10.2307/1969356zbMath0041.21203OpenAlexW2326597611MaRDI QIDQ2648993

José L. Massera

Publication date: 1949

Published in: Annals of Mathematics. Second Series (Search for Journal in Brave)

Full work available at URL: https://doi.org/10.2307/1969356

zbMATH Keywords

Ordinary differential equations

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