The units of $\mathbb Z_4[x]$
35222
Characterizing units in polynomial rings
120594
$\mathbb Z[i]/ \langle 1+2i \rangle \cong \mathbb Z_5$
127306
Is the group of units of a finite ring cyclic?
47709
If $n\mid m$ prove that the canonical surjection $\pi: \mathbb Z_m \rightarrow \mathbb Z_n$ is also surjective on units
68915
What are the units in $\mathbb{Z}[\root 3 \of 2]$?
27704
Cardinality of quotient ring $\mathbb{Z_6}[X]/(2X+4)$
148101
Basis for $\mathbb{Z}^2$
20097
Cardinality of the quotient ring $\mathbb{Z}[x]/(x^2-3,2x+4)$
143069
What are the direct summands in $\mathbb{Z}^n$?
146990
How to find the number of automorphisms on $\mathbb Z_2\times \mathbb Z_4$
157915
Isomorphism between the group $(\mathbb Z[x], +)$ and $(\mathbb Q_{>0}, .)$
116943
Proof for maximal ideals in $\mathbb{Z}[x]$
2235
Showing $\text{Aut}_\mathsf{Grp}(\mathbb{Z}/2\mathbb{Z} \times \mathbb{Z}/2\mathbb{Z}) \cong S_3$
35691
$\mathbb Z[\sqrt 3]$ contains infinitely many units
35105
Density of ring of algebraic integers in $\mathbb C$
130104
Show $4x^2+6x+3$ is a unit in $\mathbb{Z}_8[x]$ (inverting unit + nilpotent)
146617
A complete picture of the lattice of subfields for a cyclotomic extension over $\mathbb{Q}$.