proving $\mathbb {Z}_n $ is an injective $\mathbb {Z}_n$-module
50212
$R/Ra$ is an injective module over itself
128701
Are $\mathbb{Q}$ or $\mathbb{Z}$ flat modules?
151786
Proving that there is no ideal $I$ in $\mathbb{Z}[t]$ such that $\mathbb{Z}[t]/I \cong \mathbb{Q}$
17239
Find all ideals of ${\mathbb{Z}_n}$
136804
Computing $\mathrm{Hom}(\mathbb Z_n,\mathbb Z_m)$ as $\mathbb Z$-module
47709
If $n\mid m$ prove that the canonical surjection $\pi: \mathbb Z_m \rightarrow \mathbb Z_n$ is also surjective on units
150007
Prove that $(\mathbb{Z}_n , +)$, the integers $\pmod{n}$ under addition, is a group.
102938
$\Bbb F_2[X]$ modules with 8 elements
7938
Number of Homomorphisms from $\Bbb{Z}_m$ to $\Bbb{Z}_n$
120594
$\mathbb Z[i]/ \langle 1+2i \rangle \cong \mathbb Z_5$
146304
prove $(n)$ prime ideal of $\mathbb{Z}$ iff $n$ is prime or zero
137029
Prove that $\operatorname{Hom}_{\Bbb{Z}}(\Bbb{Q},\Bbb{Z}) = 0$ and show that $\Bbb{Q}$ is not a projective $\Bbb{Z}$-module.
92517
Easy way to show that $\mathbb{Z}[\sqrt[3]{2}]$ is the ring of integers of $\mathbb{Q}[\sqrt[3]{2}]$
116943
Proof for maximal ideals in $\mathbb{Z}[x]$
28934
Presentation of SL$(n,\mathbb{Z}_p)$
158583
Prove that if $M$ is an $R-$ projective left module then $M/IM$ is an $R/I-$ projective left module.
141984
Find the number of homomorphisms between $\mathbb{Z}_m$ and $\mathbb{Z}_n$