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arXiv physics/9708001math-phmath.MP
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奇异摄动的微分几何方法

A differential geometric approach to singular perturbations

F. Jamitzky

摘要:

提出了奇异摄动理论的一种微分几何方法。它表明,奇异摄动问题,如多尺度和边界层问题,可以更容易地处理微分几何的基础上。基于微分形式和Lie-导数提出了一种通用的方法。从多尺度理论,边界层理论和WKB理论的例子给出,它表明,没有先验知识的标度行为的问题的正确的渐近展开可以导出与援助的微分形式。该方法非常适合于计算机代数程序中的机械实现。

英文摘要:

A differential geometric approach to singular perturbation theory is presented. It is shown that singular perturbation problems such as multiple-scale and boundary layer problems can be treated more easily on a differential geometric basis. A general method is proposed based on differential forms and Lie-derivatives. Examples from multiple scale theory, boundary layer theory and WKB-theory are given and it is demonstrated that without the a priori knowledge of the scaling behaviour of the problem the correct asymptotic expansion can be derived with the aid of differential forms. The method is well suited for a mechanical implementation in computer algebra programs.

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