通过建立微分恒等式，研究二类非线性微分方程与线性方程之间解的零点比较定理及解的导函数的零点比较定理，推广了一些已知的结论。
Studied the point comparison theorem of solutions for two classes of nonlinear differential equation by establishing differential identity and generalized some known results.
庄容坤 郭子君.二阶微分方程解的零点比较定理[J].华南农业大学学报,1997,(1):108-113
