In chapter three, we use the same method as using in chapter two, and discuss the existence of solutions for the boundary value problem (BVP) of a class of nonlinear singular systems and a class of nonlinear singular systems with delay.

• 第三章利用和前一章同样的方法讨论了非线性广义系统和非线性滞后广义系统的边值问题，得到了相应边值问题的解的存在性定理。