數學上,曲面單值化定理是說任何曲面上都有一個常高斯曲率度量。事實上,在每一個給定的共形類中我們都可以找到一個常高斯曲率的度量。等價的說,用複分析的語言,任何單連通黎曼曲面都共形等價於複平面單位圓盤黎曼球面三者之一。

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