研究了一个具有内层现象的奇摄动微分方程边值问题,利用合成展开法和分析技巧构造了该问题的零阶近似解,并利用不动点定理证明了解的存在性,给出了精确解和渐近解的误差估计。
A singularly perturbed differential equation boundary value problem with interior layer phenomenon is studied. The zero order approximate solution of this problem is constructed using the method of composite expansions and analyt-ical skills.According to the fixed point theorem, the existence of solution is proved and the error estimate of asymptotic solution is given.