Date: Nov 19, 2012 4:08 AM Author: David Hartley Subject: Re: definition of closure in topological space question In message <Pine.NEB.firstname.lastname@example.org>, William
Elliot <email@example.com> writes
>BTY, your proof doesn't require the space to be Hausdorff, T1 or T0.
Since you were careful to talk of normal T1 spaces, I assumed you follow
the convention that regularity and normality do not require T1.