T3 space
Definition:
A space X is said to be “ Regular” or “T3 space” if for each pair consisting of a point x and a closed set B disjoint from x , there exists disjoint open sets containing x & y respectively.
Example:Rl REGULAR
Therom:
Definition:
A space X is said to be “ Regular” or “T3 space” if for each pair consisting of a point x and a closed set B disjoint from x , there exists disjoint open sets containing x & y respectively.
Example:Rl REGULAR
Therom: