4阶微分方程3点边值问题3个正解的存在性
曹银芳, 肖建中, 沈志默
Existence of Triple Positive Solutions for Three-Point Boundary Value Problems of Fourth-Order Differential Equations
CAO Yin-Fang, XIAO Jian-Zhong, SHEN Zhi-Mo
journal6 . 2011, (5): 26 -31 . 

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