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中文摘要：
考察了一个非线性二阶周期微分系统的正解，其中非线性项关于时间和空间变量两者均可为奇异的．通过构造适当的控制函数并且利用锥上的Guo—Krasnoselskii不动点定理建立了单个和多重正解的存在性．
英文摘要：
The positive solutions are considered for a nonlinear second-order periodic differential system in which the nonlinear terms may be singular with respect to both time and space variables. By constructing suitable control functions and applying Guo-Krasnoselskii fixed point theorem on cone, the existence of single and multiple positive solutions is established.
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he gap functions and error bounds of solutions of a class of set-valued mixed variational inequality
Subjective Belief Projection and Subjective Belief Probabilities for Representations of Horse Lotter
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