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莫斯托夫斯基塌陷引理

数理逻辑中,Mostowski 塌陷引理声称对任何结构 S,它带有良基关系 R 使得对 S 的每个元素 x 有 {y : y R x} 是集合,并且使得 R 满足外延性,则存在一个传递类 C(可能是真类),它在成员关系下的结构同构于 S。这个同构映射 S 的每个元素 x 到 S 的有着 y R x 的元素 y 的像的集合。它得名于安德烈·莫斯托夫斯基(Andrzej Mostowski)。

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莫斯托夫斯基塌陷引理
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