Mathematics
Undergraduate
Solved
こちらの3問をお教え頂きたいです。
問 1.(X,O)を位相空間とする.FをXの閉集合族とするとき, 次が成り立つことを示せ。
1.0, XEF
m
2. VF,… Fm E F,UFEF
i=1
3. VF, EF (入EA), N Fae F
AEA
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