Timeline for Why is a topology made up of 'open' sets?
Current License: CC BY-SA 2.5
7 events
| when toggle format | what | by | license | comment | |
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| Mar 30, 2015 at 9:21 | comment | added | Martin Brandenburg | "the category of topological spaces is equivalent to the category of relational algebras for the ultrafilter monad." -- they are isomorphic, I guess. | |
| Jun 27, 2011 at 14:15 | history | made wiki | Post Made Community Wiki | ||
| Mar 25, 2010 at 8:40 | comment | added | abcdxyz | I like this answer. | |
| Mar 24, 2010 at 17:52 | history | edited | David Carchedi | CC BY-SA 2.5 |
fixed typo
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| Mar 24, 2010 at 0:12 | comment | added | Minhyong Kim | David: That's exactly right. What you write is interesting, but I think it's clear that an answer of the form `The axioms for a topological space are equivalent to these other ones.' is not quite satifactory. | |
| Mar 23, 2010 at 23:56 | comment | added | David Carchedi | By my last sentence I mean, to undergraduates who have not yet seen what a topological space is! | |
| Mar 23, 2010 at 23:50 | history | answered | David Carchedi | CC BY-SA 2.5 |