Talk:Set is Closed iff Equals Topological Closure/Proof 2

explain about axiom of choice


 * Yeah I know. It needs to be fixed anyway. I'll think on it later. --abcxyz (talk) 19:48, 17 November 2012 (UTC)


 * This should work. --abcxyz (talk) 00:10, 24 November 2012 (UTC)