scientific article; zbMATH DE number 1159668
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Publication:4392035
zbMath0933.34036MaRDI QIDQ4392035
Publication date: 29 March 2000
Title: zbMATH Open Web Interface contents unavailable due to conflicting licenses.
existencemultiplicityperiodic solutionsresonancecrossingsemilinearPoincaré-Birkhoff fixed point theoremDuffing's equationsresonance-crossing
Nonlinear boundary value problems for ordinary differential equations (34B15) Periodic solutions to ordinary differential equations (34C25)
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