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A necessary and sufficient condition of positive solutions for nonlinear singular differential systems with four-point boundary conditions |
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| Authors: | Xinguang Zhang Lishan Liu |
| Affiliation: | a Department of Mathematics and Informational Science, Yantai University, Yantai 264005, Shandong, People’s Republic of China b School of Mathematical Sciences, Qufu Normal University Qufu, 273165 Shandong, People’s Republic of China |
| Abstract: | In this paper, we concert with the existence of positive solution for the following nonlinear singular differential system with four-point boundary conditions  |
| Keywords: | Necessary and sufficient condition Positive solutions Differential systems Schauder fixed point theorem |
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