Upper and lower solutions method and a s
β
Qiumei Zhang; Daqing Jiang
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Article
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2008
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Elsevier Science
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English
β 282 KB
The singular boundary value problem is studied in this paper.The singularity may appear at t = 0 and the function g may be superlinear at u = β and change sign. The existence of solutions is obtained via an upper and lower solutions method.