Finding A Subgroup of $A_n$ Isomorphic to $S_{n-2}$
18141
Embedding $S_n$ into $A_{n+2}$
120968
Isomorphism of stabilizer over $S_n$ to $S_{n-1}$
57309
Show that the free group on $n$ generators is a finite index subgroup of $F_2$
72048
Finding Sylow 2-subgroups of the dihedral group $D_n$
141265
Finding a normal and not normal subgroup of $S_3$
58076
Subgroup generated by a set
11731
Normal subgroups of $S_4$
77221
Prove that $G$ has a subgroup isomorphic to $G/H$.
74044
Find all subgroups of $\mathbb{Z}\times\mathbb{Z}$.
99999
A question on identifying normal subgroups of $S_4$
151210
How can we find and categorize the subgroups of $\mathbb{R}$?
115746
Find the order of a subgroup of $S_5$ generated by two elements
67199
Isomorphism $H_n(D^n, S^{n - 1};A)$ and $A$
156154
Sylow 2 subgroups of S4
64408
Subgroup of $\mathbb{Q}$ with finite index
109596
Isomorphism from $\mathrm{Aut}(\mathbb{Z}/2\mathbb{Z}\times \mathbb{Z}/2\mathbb{Z})$ to $S_3$
10998
Embedding $S_n$ in $A_{2n}$