The local truncated error estimation of the approximately solution could be obtained with reasonable computational cost.
通过合理控制计算量，得到了微分方程近似解的局部截断误差的估计。
The existence and uniqueness theorem of its solution is proved by the perturbation method and the estimation of error for its approximate solution is given.
然后利用摄动方法证明了这个问题解的存在唯一性，同时给出了解的渐近展开和误差估计。
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