Changes

The '''Urysohn lemma''' states:  

The '''Urysohn lemma''' states:  

<blockquote>

<blockquote>

If '''A''', '''B''' are 2 disjoint, closed subsets of a [[normal space]] '''X''', then there exist a [[continuous function]] ''f'' : ''X'' → [0, 1],  such that '''f(A)''' = 0 and '''f(B)''' = 1.

If ''A'', ''B'' are 2 disjoint, closed subsets of a [[normal space]] ''X'', then there exist a [[continuous function]] ''f'' : ''X'' → [0, 1],  such that ''f(A)'' = 0 and ''f(B)'' = 1.

</blockquote>

</blockquote>

The converse of the Urysohn lemma also holds.

The converse of the Urysohn lemma also holds.

[[category: Topology]]

[[category: Topology]]