Mathematics
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dragoboy
  • Member for 9 years, 2 months
  • Last seen more than a month ago
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68
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All Questions Answers
Score Newest
question
15
Can class number decrease as we grow over some fixed number field?
Nov 19, 2019
answer
13
For an irrational number $\alpha$, prove that the set $\{a+b\alpha: a,b\in \mathbb{Z}\}$ is dense in $\mathbb R$
Aug 7, 2014
answer
12
Irreducible polynomial which is reducible modulo every prime
Nov 8, 2015
answer
8
Prove that the union of countably many countable sets is countable.
Aug 6, 2014
answer
6
For an irrational number $\alpha$, prove that the set $\{a+b\alpha: a,b\in \mathbb{Z}\}$ is dense in $\mathbb R$
Aug 6, 2014
answer
5
Is $\mathbb{Q}(\sqrt{2}, \sqrt{3}) = \mathbb{Q}(\sqrt{2}+\sqrt{3})$?
Aug 6, 2014
question
4
Intersection of cyclotomic fields over an arbitary number field
Mar 16, 2021
answer
4
Show that $k(\theta)/k$ is Galois if the extension degree is prime and $k(\theta)$ contains a conjugate of $\theta$ over $k$ that is not $\theta$.
Nov 12, 2015
question
4
$V = W_1\oplus W_2\oplus... \oplus W_s$ we must have $W = (W_1 \cap W )\oplus (W_2\cap W)\oplus ..... (W_s \cap W)$?
Jun 23, 2016
question
4
Can $\{(f(t),g(t)) \mid t\in [a,b]\}$ cover the entire square $[0,1] \times [0,1]$ ?
Jun 19, 2016
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9
Cusp forms with integer Fourier-coefficients
9
Fuchsian groups and Eichler's result

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