## Topological Methods in Nonlinear Analysis

### Periodic solutions to singular second order differential equations: the repulsive case

#### Abstract

This paper is devoted to study the existence of periodic solutions to the second-order differential equation $u''+f(u)u'+g(u)=h(t,u)$, where $h$ is a Carathéodory function and $f,g$ are continuous functions on $(0,\infty)$ which may have singularities at zero. The repulsive case is considered. By using Schaefer's fixed point theorem, new conditions for existence of periodic solutions are obtained. Such conditions are compared with those existent in the related literature and applied to the Rayleigh-Plesset equation, a physical model for the oscillations of a spherical bubble in a liquid under the influence of a periodic acoustic field. Such a model has been the main motivation of this work.

#### Article information

Source
Topol. Methods Nonlinear Anal., Volume 39, Number 2 (2012), 199-220.

Dates
First available in Project Euclid: 21 April 2016

https://projecteuclid.org/euclid.tmna/1461243178

Mathematical Reviews number (MathSciNet)
MR2985878

Zentralblatt MATH identifier
1279.34038

#### Citation

Hakl, Robert; Torres, Pedro J.; Zamora, Manuel. Periodic solutions to singular second order differential equations: the repulsive case. Topol. Methods Nonlinear Anal. 39 (2012), no. 2, 199--220. https://projecteuclid.org/euclid.tmna/1461243178

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