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awarded  Great Answer
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revised Chance of getting a date
work around mathjax bug
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Jul
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comment A property of subsets of topological spaces
Interesting, in that case I'll have to check my original proof for errors. My topology has become quite rusty, so give my some time :)
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Mar
12
revised A property of subsets of topological spaces
typo
Mar
12
comment A property of subsets of topological spaces
@S.L. I expanded my question with some context.
Mar
12
revised A property of subsets of topological spaces
clarify Lebesgue condition
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12
awarded  Nice Question
Mar
12
revised A property of subsets of topological spaces
add some additional information
Mar
8
comment Factorial of 0 - a convenience?
I've always felt comfortable with $0!=1$, because $(n-1)!=\frac{n!}{n}$
Mar
8
comment A property of subsets of topological spaces
@S.L.: Requiring this property of the set of $X$'s isolated points in addition to $X$ satisifying the Lebesgue condition is necessary and sufficient for compactness; that was the reason for defining it. I'm just not sure if this fact is interesting at all; hence the question.
Mar
8
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Mar
6
comment A property of subsets of topological spaces
@HennoBrandsma: Actually, "empty interior" is sufficient -- $Y\setminus N$ needs to be finite, not necessarily $X\setminus N$.
Mar
6
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