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Katlus
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Apparently, this user prefers to keep an air of mystery about them.

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  • Member for 8 years, 9 months
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  • Last seen Feb 9 '13 at 12:37

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26 What is an example that a function is differentiable but derivative is not Riemann integrable Dec 12 '12
20 If $\gcd(a,b)=1$, then $\gcd(a^n,b^n)=1$ Jul 5 '12
18 Difference between ZFC & NBG Apr 24 '12
18 How do i prove that every open set in $\mathbb{R}^2$ is a union of at most countable open rectangles? Jan 6 '13
17 Difference between Norm and Distance Jul 17 '12
16 Prove that every set with more than one element has a permutation without fixed points Apr 19 '12
11 Does there exist a bijection between empty sets? May 4 '12
11 Complete ordered field Jun 19 '12
9 Every open set in $\mathbb{R}$ is the union of an at most countable collection of disjoint segments Aug 12 '12
8 What are 'weak' forms of Urysohn's lemma, which do not require choice? Jan 16 '13
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