本文研究了一类具有局部弱稳定退化解的二阶非线性方程的奇摄动问题的边界层现象.运用界定函数法找到具体的上下解,再通过微分不等式理论证明了解的存在性,并给出了解的渐近估计.
This paper studies, boundary layer phenomena of the singularly perturbed problems for a class of the second-order nonlinear equations with the reduced solutions of local weak stability. The upper and lower solutions are found by the bounding functions, and the existence of solutions is proved and the asymptotic estimation of solutions is given by applying the theory of differential inequality.