Mathematics
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bob
  • Member for 8 years, 6 months
  • Last seen more than 4 years ago
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All Questions Answers
Score Newest
question
8
$a+b\sqrt{-3}$ and $a-b\sqrt{-3}$ are coprime in $\mathbb{Z}+ \omega \mathbb{Z}$
May 11, 2017
question
7
Prove that congruent matrices have the same rank.
Jun 3, 2015
question
7
If $p=a^2+4b^2$ for some $a,b \in \mathbb{Z}$, then $a$ is quadratic residu modulo $p$?
Jun 25, 2017
question
6
Finitely many $x,y \in \mathbb{Z}[i]$ such that $x^2=y^2+36$.
Jun 24, 2017
question
5
$a+b\phi$ and $a+b-b\phi$ are associates in $\mathbb{Z}+\phi \mathbb{Z}$, with $\phi=(1+\sqrt{5})/2$.
May 7, 2017
question
4
There exist no ring homomorphism $\sigma$ between $\mathbb{Q}_3$ and $\mathbb{Q}_5$ with $\sigma(1)=1$.
Jun 25, 2017
question
4
$x=(a+b\omega)^3$ with $\omega$ a primitive third root of unity. Then $x=(c+d\sqrt{-3})^3$. ($a,b,c,d \in \mathbb{Z}$)
May 9, 2017
question
4
$\mathbb{Q}_2$ and its quadratic field extensions
Apr 22, 2017
question
3
Show that $\tau _f$ \ $\tau_{st}$ is uncountable.
Oct 13, 2016
question
3
polynomial approximations of $1/z$ on the unit circle
Jun 21, 2017

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