带有凹非线性项的平均曲率半正问题正解的确切个数
李晓东,高红亮,徐晶

Exact Multiplicity of Positive Solutions for a Semipositone Mean Curvature Problem with Concave Nonlinearity
Xiaodong Li,Hongliang Gao,Jing Xu
图2 $\theta(u)$ 的图像