$\mathbb{Z}^n/R$ where $R$ is subgroup generated by rows of $n\times n$ integer matrix $M$.
137422
$\mathrm{card}(\mathbb{Z}^n/M\mathbb{Z}^n) = |\det(M)|$?
13761
Automorphisms in $\mathbb{Z}_n$
83001
Easier way to show $(\mathbb{Z}/(n))[x]$ and $\mathbb{Z}[x] / (n)$ are isomorphic
4838
For $N\unlhd G$ , with $C_G(N)\subset N$ we have $G/N$ is abelian
151130
When is the product of $n$ subgroups a subgroup?
128732
$\mathbb Z_{p^n}$ is not the direct product of any family of its proper subgroups
2064
Finite subgroups of orthogonal transformations in $\mathbb{R}^3$
156909
$\Bbb{Z}_{26} \rtimes_{\alpha} \Bbb{Z}_{5} \cong \Bbb{Z}_{26} \times \Bbb{Z}_{5}$ as groups.
101345
Suppose $n$ is an even positive integer and $H$ is a subgroup of $\mathbb Z/n \mathbb Z$. Prove that either every element of $H$ is...
30752
Proof of $(\mathbb{Z}/m\mathbb{Z}) \otimes_\mathbb{Z} (\mathbb{Z} / n \mathbb{Z}) \cong \mathbb{Z}/ \gcd(m,n)\mathbb{Z}$
74044
Find all subgroups of $\mathbb{Z}\times\mathbb{Z}$.
28934
Presentation of SL$(n,\mathbb{Z}_p)$
38946
Show that $\{\cup_{n\in K} (n, n+1]: K \subset \mathbb{Z}\}$ is a $\sigma$-algebra on $\mathbb{R}$
29608
If GCD $(a_1,\ldots, a_n)=1$ then there's a matrix in $SL_n(\mathbb{Z})$ with first row $(a_1,\ldots, a_n)$
5577
If $m$ divides $n$, find a free resolution of $\mathbb{Z}/m$ as a $\mathbb{Z}/n$-module.
67926
$S_n$ is generated by elements of the form $(1k)$
5699
The number of ring homomorphisms from $\mathbb{Z}_m$ to $\mathbb{Z}_n$