Subgroup of $S_4$ of order 4
99694
Number of subgroups of $S_4$
152589
How to show that if $G$ is union of three proper subgroups, then there is an epimorphism from $G$ to the Klein 4-group?
72150
Union of the conjugates of a proper subgroup
129157
An exercise on isomorphic groups of order 24
79055
Orders of a symmetric group
59138
Subgroups of $S_4$ isomorpic to $S_2$
98601
Any  group of order four is either cyclic or isomorphic to $V$
51352
Subgroups of a finite abelian group
151727
If $|G/H|=4$ then $G$ is union of three proper subgroups
137691
What are the self-normalizing subgroups of $S_n$?
104080
Group with order $pq$ has subgroups of order $p$ and $q$
151193
Simple subgroup of Symmetric Group
62277
Cayley tables for two non-isomorphic groups of order 4.
155669
$\mathrm{Aut}(D_4)$ is isomorphic to $D_4$
89508
Existence of normal subgroups for a group of order $36$
125498
Check whether subgroup is normal in $ S_4$
13717
Homomorphisms from $S_4$ to $\mathbb Z_2$