本章同样使用优级数法讨论一类带时滞的迭代微分方程解析解的存在性。

In this chapter, existence of analytic solutions of an iterative differential equation with state-dependent delays is studied by using a similar method.

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本文的第二章讨论了三类平面映射的解析不变曲线，用优级数方法讨论了不变曲线迭代函数方程解析解的存在性。

In chapter 2, three kinds of planar mappings are discussed. We reduce the existence of analytic invariant curves of iterative functional equation by means of majorant series.

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本文的第二章讨论了三类平面映射的解析不变曲线，用优级数方法讨论了不变曲线迭代函数方程解析解的存在性。

In chapter 2, three kinds of planar mappings are discussed. We reduce the existence of analytic invariant curves of iterative functional equation by means of majorant series.

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