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KP Hart's user avatar
KP Hart's user avatar
KP Hart
  • Member for 15 years
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I am a general topologist and occasional set theorist

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30
Sets with positive Lebesgue measure boundary
May 26, 2010
23
What are examples of mathematical concepts named after the wrong people? (Stigler's law)
May 11, 2010
19
Is this question about US spaces still an open problem?
Oct 27, 2021
17
Is Stone-Čech compactification of 0-dimensional space also 0-dimensional?
Apr 11, 2012
16
Partition of unity without AC
May 17, 2024
15
Is "compact implies sequentially compact" consistent with ZF?
Jun 23, 2010
15
Is "All hyperreal fields $C(\mathbb{R})/M$ are isomorphic" independent of ZFC?
Aug 19, 2023
14
On the origin of the well-ordering principle of $\mathbb{Z}^{+}$
Jan 17
14
Mistake on article about Bohr compactification?
Dec 9, 2024
13
What is your favorite proof of Tychonoff's Theorem?
May 30, 2010
Top network posts
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6
The domain of $f(x) = \ln (x + \sqrt{1+ x^2}).$
5
Book reference for topology: Can I avoid filters?