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zbMath0312.34036MaRDI QIDQ4071572

Herb I. Freedman

Publication date: 1974

Title: zbMATH Open Web Interface contents unavailable due to conflicting licenses.

Mathematics Subject Classification ID

Periodic solutions to ordinary differential equations (34C25) Oscillation theory, zeros, disconjugacy and comparison theory for ordinary differential equations (34C10) Perturbations, asymptotics of solutions to ordinary differential equations (34E10)

Related Items (1)

The nonbifurcation of periodic solutions when the variational matrix has a zero eigenvalue

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