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On a periodic problem for super-linear second-order ODEs

  • Jiří Šremr EMAIL logo
Published/Copyright: December 6, 2024
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Abstract

The present paper concerns the periodic problem

u=p(t)uq(t,u)u+f(t);u(0)=u(ω),u(0)=u(ω),

where p, f : [0, ω] → ℝ are Lebesgue integrable functions and q : [0, ω] × ℝ → ℝ is a Carathéodory function. We assume that the anti-maximum principle holds for the corresponding linear problem and provide sufficient conditions guaranteeing the existence and uniqueness of a positive solution to the given non-linear problem. The general results obtained are applied to the non-autonomous Duffing type equation with a super-linear power non-linearity.

MSC 2010: 34C25; 34B18

Funding statement: The research has been supported by the internal grant FSI-S-20-6187 of FME BUT

  1. Communicated by Jozef Džurina

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Received: 2023-09-21
Accepted: 2024-06-03
Published Online: 2024-12-06
Published in Print: 2024-12-15

© 2024 Mathematical Institute Slovak Academy of Sciences

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