Metrizable implies Hausdorff
Let
Proof
Let
with (if no such exist then the conclusion is trivially satisfied). Let . Then and are disjoint open neighbourhoods of and respectively. Since if then which is a contradiction.
Let
Proof
Let
with (if no such exist then the conclusion is trivially satisfied). Let . Then and are disjoint open neighbourhoods of and respectively. Since if then which is a contradiction.