## Topological Methods in Nonlinear Analysis

### Twin positive periodic solutions of second order singular differential systems

#### Abstract

In this paper, we study positive periodic solutions to singular second order differential systems. It is proved that such a problem has at least two positive periodic solutions. The proof relies on a nonlinear alternative of Leray-Schauder type and on Krasnosel'skiĭ fixed point theorem on compression and expansion of cones.

#### Article information

Source
Topol. Methods Nonlinear Anal., Volume 25, Number 2 (2005), 263-273.

Dates
First available in Project Euclid: 23 June 2016

https://projecteuclid.org/euclid.tmna/1466705109

Mathematical Reviews number (MathSciNet)
MR2154428

Zentralblatt MATH identifier
1098.34032

#### Citation

Lin, Xiaoning; Jiang, Daqing; O'Regan, Donal; Agarwal, Ravi P. Twin positive periodic solutions of second order singular differential systems. Topol. Methods Nonlinear Anal. 25 (2005), no. 2, 263--273. https://projecteuclid.org/euclid.tmna/1466705109

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