Existence and multiplicity of positive solutions to nonlinear fourth-order three-point boundary value problems(非线性四阶三点边值问题的正解存在性与多解性) di YAOQing-liu(姚庆六)

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Two-point boundary value problems of a class of singular fourth-order ordinary differential equations(一类奇异4阶常微分方程的两点边值问题) di YAOQing-liu(姚庆六)

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