- #1
enricfemi
- 195
- 0
we can prove that:
the intersection of a finite number of open sets is open.
how about:
the intersection of any number of open sets?
it's maybe not open.but how to prove it or the example?
the intersection of a finite number of open sets is open.
how about:
the intersection of any number of open sets?
it's maybe not open.but how to prove it or the example?