“Poincare-Birkhoff theorem”的概念、定义、翻译、参考文献-科学参考

单词	Poincare-Birkhoff theorem
释义	Poincare-Birkhoff theorem Encyclopedia 理学不可积系统释 Poincare-Birkhoff theorem庞加莱-伯克霍夫定理描述哈密顿系统的有理数环面在扰动下的命运的定理。由法国数学家庞加莱（Henri Poincaré，1854～1912）和美国数学家G.D.伯克霍夫（George David Birkhoff，1884～1944）先后提出。
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