On the positive periodic solutions of the nonlinear Duffing equations with delay and variable coefficients

zbMath1080.34052MaRDI QIDQ1772536

Weigao Ge, Yuji Liu

Publication date: 18 April 2005

Published in: Bulletin of the Belgian Mathematical Society - Simon Stevin (Search for Journal in Brave)

Full work available at URL: https://projecteuclid.org/euclid.bbms/1093351383

zbMATH Keywords

conefixed-point theorempositive periodic solutionnonlinear Duffing equation

Mathematics Subject Classification ID

Periodic solutions to functional-differential equations (34K13)

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