Mathematics
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zarathustra
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All Questions Answers
Score Newest
answer
15
Statement that is provable in $ZFC+CH$ yet unprovable in $ZFC+\lnot CH$
Jan 23, 2014
answer
15
Can every set be a group?
Aug 4, 2013
answer
11
understanding $\mathbb{R}$/$\mathbb{Z}$
Apr 27, 2013
answer
10
If a prime number is reversed, and then appended to itself, why is the result always a composite number?
Jan 6, 2015
answer
10
A Lattice that is not a Complete Lattice
Oct 28, 2016
question
9
Proof of non-existence of non-principal $\kappa$-complete ultrafilter
Dec 17, 2013
answer
7
The conjugate of a sylow $p$-subgroup is a sylow $p$-subgroup
Aug 20, 2016
answer
7
How can I expand mathematical induction to rational numbers?
Jul 23, 2013
answer
7
Product of Permutations
Sep 21, 2013
answer
6
Negating the definition of a limit point
Jan 6, 2015
Top Meta posts
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15
Is it in the site's habits and customs to keep an upvoted question with answer, despite the quality of the question?
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6
Characterising $(aa)^*$ in first order logic
6
Meaning of empty clause
6
What problem cannot be solved by a short program?

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