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Talk:Nowhere-dense set

From Encyclopedia of Mathematics
Revision as of 06:45, 23 September 2012 by Boris Tsirelson (talk | contribs) (Yes, only if Hausdorff)
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The original article uses the terminology boundary set for sets which are complements of dense sets. Since I never heard it before and I could not find it in a textbook, I have omitted it. Camillo (talk) 19:15, 22 September 2012 (CEST)

"if infinitely many factors are non compact, then any compact subset of X is nowhere dense" — really so? Or only if Hausdorff? --Boris Tsirelson (talk) 20:13, 22 September 2012 (CEST) Yes, only if Hausdorff; otherwise a compact set can be dense! I have a counterexample. --Boris Tsirelson (talk) 08:45, 23 September 2012 (CEST)

How to Cite This Entry:
Nowhere-dense set. Encyclopedia of Mathematics. URL: http://encyclopediaofmath.org/index.php?title=Nowhere-dense_set&oldid=28113