A topological space \(X\) is regular if for every closed set \(F\subseteq X\) and every point \(x\in X\sm F\) there are disjoint open sets \(U, V\subseteq X\) with \(x\in U\) and \(F\subseteq V\).
Regular space
D-EPTMG
D-EPTMG
A topological space \(X\) is regular if for every closed set \(F\subseteq X\) and every point \(x\in X\sm F\) there are disjoint open sets \(U, V\subseteq X\) with \(x\in U\) and \(F\subseteq V\).