To ensure the existence of the solution, it is required that the close-loop poles not be coincident with the open-loop ones.
为保证方程有解，该算法要求系统的开环和闭环极点不能重合。
We obtain the existence of the solution of the second order boundary value problem and the asymptotic estimation by some hypothetic condition.
证明了第二边值问题摄动解的存在，并给出了渐近估计式。
Under the general conditions, we prove the existence of the solution and get the asymptotic expansions of the solution and its derivatives, which are uniformly valid for the higher orders.
在一般的条件下，证明了解的存在性，而且得到解及其各导数的高阶一致有效渐近展开式。
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