Construct Subgroups of $\mathbb{Z} \times \mathbb{Z}$
74044
Find all subgroups of $\mathbb{Z}\times\mathbb{Z}$.
10602
Monotone Union of subgroups being subgroup
61709
Compute factor group $\dfrac{\mathbb{Z}_4 \times \mathbb{Z}_6}{\langle(2,3)\rangle}$ - Fraleigh p. 147 Example 15.11
40490
Birational isomorphism $\mathbb{P}^n\times \mathbb{P}^m\to \mathbb{P}^{n+m}$
88262
How to enumerate subgroups of each order of $S_4$ by hand
90239
$\mathbb{Z} \times \mathbb{Z}$ is cyclic.
47522
group generators of $(\mathbb Z_{17}-\{0\},\times)$
64269
Finding the minimal $n$ such that a given finite group $G$ is a subgroup of $S_n$
120035
Pattern in Isomorphisms between $\mathbb Z_m \times \mathbb Z_n$ and $\mathbb Z_{mn}$
33387
Proof that $n\Bbb Z \leq \Bbb Z$ and are the only subgroups of $\Bbb Z$
64419
How to construct a homomorphism from an abelian group to $\mathbb{Q}/\mathbb{Z}$?
52517
Construction of $\mathbb{CP}^2$ from $S^2\times S^2$
67772
How to find $k$ such that $(\mathbb{Z} \times \mathbb{Z})/ \langle (m,n)\rangle \cong \mathbb{Z} \times \mathbb{Z}_k$
140471
Is $ G \cong G/N \times N$?
147968
Calculate the Factor Group $(\mathbb{Z}_4 \times \mathbb{Z}_6)/\langle(0,2)\rangle$
114916
$\mathbb Z_{mn}$ isomorphic to $\mathbb Z_m\times\mathbb Z_n$ whenever $m$ and $n$ are coprime
151210
How can we find and categorize the subgroups of $\mathbb{R}$?