A necessary and sufficient condition for the existence of positive solutions to a class of singular second-order boundary value problems
Nonlinear functional analysis and applications(2016)
摘要
We study the existence of positive solutions to a class of second order singular boundary value problems by means of lower and upper solutions. A necessary and sufficient condition for the existence of C[0, 1] and C1[0, 1] positive solutions is obtained. Results of this paper extend and include some results in [4-7].
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