非线性Sturm-Liouville边值问题在其参数存在间断性时解的存在性研究
비선성Sturm-Liouville변치문제재기삼수존재간단성시해적존재성연구
Studying for the Existence of Solutions to Nonlinear Sturm-Liouville's Boundary Value Problems with Piecewise Parameter
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