units of $\mathbb Z[\sqrt{-5}]$
95863
Describe the units in $\mathbb{Z}[\sqrt{-d}]$
93703
Groups of units of $\mathbb{Z}\left[\frac{1+\sqrt{-3}}{2}\right]$
38549
$\mathbb{Q}(\sqrt{n}) \cong \mathbb{Q}(\sqrt{m})$ iff $n=m$
35691
$\mathbb Z[\sqrt 3]$ contains infinitely many units
89864
Units in finite polynomial rings
156909
$\Bbb{Z}_{26} \rtimes_{\alpha} \Bbb{Z}_{5} \cong \Bbb{Z}_{26} \times \Bbb{Z}_{5}$ as groups.
47709
If $n\mid m$ prove that the canonical surjection $\pi: \mathbb Z_m \rightarrow \mathbb Z_n$ is also surjective on units
92583
Prove that $N(\gamma) = 1$ if, and only if, $\gamma$ is a unit in the ring $\mathbb{Z}[\sqrt{n}]$
32772
Proving units in a ring
1576
Finding the elements in the group of units of the ring of integers modulo n that are their own inverse.
50785
Galois group of $x^4-5$
70522
$y^2 = \frac{x^5 - 1}{x-1}$ & $x,y \in \mathbb{Z}$
145752
Aut $\mathbb Z_p\simeq \mathbb Z_{p-1}$
84823
When is the group of units in $\mathbb{Z}_n$ cyclic?
130027
Give a direct proof of the fact that $a^2-5a+6$ is even for any $a \in \mathbb Z$
10760
Why is the product of all units of a finite field equal to $-1$?
148550
Units in quotient ring of $\mathbb Z[X]$