“perturbation theory”的概念、定义、翻译、参考文献-科学参考

单词	perturbation theory
释义	perturbation theory [´pǝr·tǝr`bā·shǝn ´thē·ǝ·rē] ^MATHEMATICS The study of the solutions of differential and partial differential equations from the viewpoint of perturbation of solutions. ^PHYSICS The theory of obtaining approximate solutions to the equations of motion of a physical system when these equations differ by a small amount from equations which can be solved exactly.
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