把系统从一个状态变到另一个状态的操作。若变换前后系统的状态等价，则称该变换为“对称”变换

来源: marketreflections 于 2011-04-16 17:29:09 [博客] [旧帖] [给我悄悄话] 本文已被阅读：次

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