【摘要】 利用边界层函数法研究一类非线性三阶奇摄动方程的边值问题.当gy′>0时,首先将所论问题转化成等价的Tikhonov方程组边值问题,然后构造了它的双边界层渐近解,并证明了所有边界函数的指数式衰减特性.最后给出了所论问题解的存在唯一性以及渐近解的余项估计.当gy′<0时,简要地说明了为什么本问题一般无解.更多还原

【Abstract】 This paper studied a kind of BVP of nonlinear third order singularly perturbed equations by boundary layer function method. When gy′>0, at first, the problem was turned to a BVP of an equivalent Tikhonov system. Then the asymptotic solution of doubly boundary layer for the system was constructed, and the character of exponential decay for all boundary functions was proved. Finally the main results of this paper: existence and uniqueness of solution and estimation of remainder for the problem were given. When gy′<0, in general, there is no solution to this problem.更多还原