|WikiProject Mathematics||(Rated Start-class, Mid-importance)|
126.96.36.199 (talk) 22:41, 14 January 2010 (UTC) One small thing, the link to closure is for the concept of closure of an operation, not topological closure. 188.8.131.52 (talk) 22:41, 14 January 2010 (UTC)
I opt to remove the section 'Density in metric spaces' on the grounds that most of the information there properly belongs to other articles or is too trivial to be given such prominence. Maybe we could merge some of it into the 'Properties' or 'Examples' sections.