A Lazer-Leach-type condition for singular differential equations with a deviating argument at resonance
Abstract In this paper, we establish a Lazer-Leach-type condition depending on the delay for the existence of positive periodic solutions for singular differential equations with a deviating argument at resonance. The proof of the main result is based on the phase-plane analysis and topological degr...
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| Format: | Article |
| Language: | English |
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SpringerOpen
2017-07-01
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| Series: | Advances in Difference Equations |
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| Online Access: | http://link.springer.com/article/10.1186/s13662-017-1240-0 |