Urysohn lemma
= Urysohn lemma
{c}
{wiki=Urysohn's_lemma}
If $A,B$ are disjoint closed subsets of a normal space, there is a continuous function $f:X\to[0,1]$ with $f|_A=0$ and $f|_B=1$.
= Urysohn lemma
{c}
{wiki=Urysohn's_lemma}
If $A,B$ are disjoint closed subsets of a normal space, there is a continuous function $f:X\to[0,1]$ with $f|_A=0$ and $f|_B=1$.