Finding all Sylow 2-subgroups
72048
Finding Sylow 2-subgroups of the dihedral group $D_n$
75568
Subgroup of index $2$ is Normal
11731
Normal subgroups of $S_4$
119360
Find all subrings of $\mathbb{Z}^2$
39938
Subgroups of a cyclic group and their order.
144582
Index of a subgroup in $SL_2(\mathbb{Z})$
64269
Finding the minimal $n$ such that a given finite group $G$ is a subgroup of $S_n$
49666
Generalization of index 2 subgroups are normal
87766
Using Cayley's Theorem to find an isomorphic subgroup.
59138
Subgroups of $S_4$ isomorpic to $S_2$
103829
Find the subgroups of A4
28181
Sylow subgroups of $S_3$ and $S_4$
117324
How to find all subgroups of a group in GAP
58397
Every cyclic group with order > 2 has at least 2 distinct generators
117744
$p$-Sylow in quotient groups
36040
A Group Having a Cyclic Sylow 2-Subgroup Has a Normal Subgroup.
99694
Number of subgroups of $S_4$