Show that any nonempty set A c (X, d) is open if and only if it is a
union of open balls.
Mathbot Says...
I wasn't able to parse your question, but the HE.NET team is hard at work making me smarter.
Show that any nonempty set A c (X, d) is open if and only if it is a
union of open balls.
I wasn't able to parse your question, but the HE.NET team is hard at work making me smarter.