Topological Methods in Nonlinear Analysis
- Topol. Methods Nonlinear Anal.
- Volume 25, Number 2 (2005), 263-273.
Twin positive periodic solutions of second order singular differential systems
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.
Topol. Methods Nonlinear Anal., Volume 25, Number 2 (2005), 263-273.
First available in Project Euclid: 23 June 2016
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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