modnarandom
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Hi,
I was reading over a solution after working on a problem and got confused about some parts:
http://nweb.math.berkeley.edu/sites/default/files/pages/f10solutions.pdf
(first problem)
First, how do we know that there are disjoint open sets U and V for each of the separated sets? (does this have anything to do with the covers for A and B?) Also, I'm not sure why the intersection of the sets F_i is empty.
Thanks!
I was reading over a solution after working on a problem and got confused about some parts:
http://nweb.math.berkeley.edu/sites/default/files/pages/f10solutions.pdf
(first problem)
First, how do we know that there are disjoint open sets U and V for each of the separated sets? (does this have anything to do with the covers for A and B?) Also, I'm not sure why the intersection of the sets F_i is empty.
Thanks!