四阶超线性奇异微分方程正解存在的充分必要条件

赵增勤;

A Necessary and Sufficient Condition for the Existence of Positive Solutions of Fourth Order Singular Superlinear Differential Equations

Zeng Qin ZHAO

数学学报 . 2007, (6): 1425 -143 . DOI: 10.12386/A2007sxxb0167