# Talk:topology

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## mathematical def[edit]

"*a collection τ of subsets of a set X […] and τ is closed […]*"

What is meant by "closed" ? --Jerome Potts 20:39, 29 November 2010 (UTC)

## Link to topography[edit]

The nouns definitions have the subject area of each definition in brackets, such as *(mathematics)*. In the wiki code these are marked up as {*{context}*}. Some of them show on the page as clickable links. Topography doesn't. I manually added a link for that but I'm wondering why it was necessary. Where is the coding that makes {*{context|*(mathematics)*|lang=en}*} and {*{context|*(computing)*|lang=en}*} show a link but not {*{context|*(topography)*|lang=en}*}? 78.144.64.248 14:48, 12 September 2014 (UTC)

- I think you want Module:labels/data. Equinox ◑ 15:01, 12 September 2014 (UTC)