针对Cole问题中退化根为非零根的几种情况进行了研究,借助Linard变换将所研究问题转化为可以用边界函数法处理的问题,并用边界函数法构造了该问题n阶形式渐近解,用微分不等式理论证明了解的存在性和形式渐近解的一致有效性。
By using the transformation of Linard,it studies Cole problem when it has non-zero degenerate solution.The method of boundary functions was used to construct the formal asymptotic solution of this singular perturbed problem.Finally,using the method of differential inequality the existence of solution and the uniform validity of its formal asymptotic solution were proved.