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复流形

微分几何中,复流形(英語:Complex manifold)是一个使得每个鄰域在一种连续的方式下看起来象一个複n维空间的流形。更精确的讲,一个复流形有一个坐标图册,其每个坐标图映射到Cn,并且坐标图之间的坐标变换是全纯的。

复流形可以视为微分流形的一种特例。例如,一个1维复流形几何上就是一个曲面,称为黎曼曲面。变换函数必须全纯这个要求意味着和通常的微分流形不同,不同的Ck-微分结构对于不同k没有区别,因为全纯函数解析,一次每个全纯结构也是一个Ck结构,对于任意k ≥1成立。

复流形的理论和实流形的有相当不同的感受,因为複解析函数比光滑函数更为严格。例如,使用惠特尼嵌入定理,每个实流形可以嵌入为Rn的子流形,,但是很少有复流形可以成为Cn的子流形。

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复流形
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