In this article, we consider the existence and multiplicity of positive periodic solutions for a first-order singular system with impulse effects. The proof of our main result is based on Krasnoselskii's fixed point theorem in a cone.
Submitted January 24, 2013. Published May 17, 2013.
Math Subject Classifications: 34A34, 34A37.
Key Words: Positive periodic solution; singular systems; impulsive; fixed point theorem.
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| Bian-Xia Yang |
School of Mathematics and Statistics, Lanzhou University
Lanzhou, Gansu 730000, China
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