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Paul
  • Member for 11 years, 3 months
  • Last seen more than 2 years ago
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Top posts
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question
5
A result on spaces with countable pseudocharacter and countable tightness
Apr 4, 2017
question
5
Is there a star countable, semi-stratifiable space $X$ with $|X|> \mathfrak c$? [closed]
Apr 7, 2017
question
5
Is there a Hausdorff weakly Lindelof space which is not DCCC?
Nov 8, 2017
question
5
A regular first countable space of cellularity at most $2^\omega$
Dec 20, 2017
question
4
Semi-metrizable spaces with countable chain condition
Apr 20, 2017
question
4
Is there a metacompact, normal, CCC space which is not Lindelof
Nov 14, 2017
question
4
Is $c(\mathcal M(X)) = c(X)$ for any first countable regular space?
Jan 31, 2018
question
3
Is there a calibre $\aleph_1$ Moore space which is not separable
Nov 11, 2017
question
3
How could I see quickly that this space is not normal?
Dec 5, 2017
question
3
A question on quasitopological group
Jun 14, 2018
Top network posts
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34
How to show that the product of two irrational numbers may be irrational?
21
How to construct a Bernstein set and what are their applications?
18
Can someone explain how $\frac{\tan x}{\sec x}=\sin x$?
16
Show $1/(1+ x^2)$ is uniformly continuous on $\Bbb R$.
13
Let $Y$ be an ordered set in the order topology with $f,g:X\rightarrow Y$ continuous, show that $\{x:f(x)\leq g(x)\}$ is closed in $X$