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Mathematics
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user49640
  • Member for 7 years, 10 months
  • Last seen more than 7 years ago
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5
Should this question have been closed?
Jun 14, 2017
question
2
Should this question have been closed?
Jun 14, 2017
answer
1
Requests for Reopen & Undeletion Votes, etc. (volume 01/2015 - 07/2018 )
Apr 20, 2017
question
-8
What exactly is unclear about this question?
Feb 20, 2017
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15
Finding solutions to $2^x+17=y^2$
14
Good books on complex numbers
10
$f(x)=ax+b$ for some $a,b\in\mathbb{Q}$ if $f(\mathbb{Q})\subset\mathbb{Q}$ and $f(\mathbb{R-Q})\subseteq \mathbb{R}-\mathbb{Q}$
7
Given that $a\cos\theta+b\sin\theta+A\cos 2\theta+B\sin 2\theta \leq 1$ for all $\theta$, prove that $a^2+b^2\leq 2$ and $A^2+B^2 \leq 1$
6
showing $\mathbb{Q}$ is isomorphic to $\mathbb{R}$ or not as a group under addition