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正规算子

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数学中,尤其是泛函分析领域,一个复希尔伯特空间上的正规算子(英語:normal operator,是一个与其埃尔米特伴随可交换的连续线性算子,即[1]

例子

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  • 一个幺正算符满足,即幺正算符与它的伴随互为逆变换。显然幺正算符的定义中即说明了它必然是一个正规算子。
  • 一个厄米算符满足。由于任何一个算子与它自身都是可交换的,于是所有厄米算符都是正规的。

参考

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  1. ^ Hoffman, Kenneth; Kunze, Ray, Linear algebra 2nd, Englewood Cliffs, N.J.: Prentice-Hall, Inc.: 312, 1971, MR 0276251 
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正规算子
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