A space X is nearly metacompact if and only if every monotone open cover U has an open refinement that is point-finite on some dense subset of X;

空间X是几乎亚紧的当且仅当X的每一单调开覆盖U有一个开加细，且在X的某一稠密子集上是点有限的；

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A space X is nearly metacompact if and only if every monotone open cover U has an open refinement that is point-finite on some dense subset of X;

空间X是几乎亚紧的当且仅当X的每一单调开覆盖U有一个开加细，且在X的某一稠密子集上是点有限的；

youdao