How to describe all normal subgroups of the dihedral group Dn?
22444
Normal subgroups of dihedral groups
19229
How to find all groups that have exactly 3 subgroups?
83916
Center of dihedral group
26321
How to describe the quotient group Z x Z /
78580
Is $SL_n(\mathbb{R})$ a normal subgroup in $GL_n(\mathbb{R})$?
137691
What are the self-normalizing subgroups of $S_n$?
112677
understanding the commutator of dihedral group
44165
the image of normal subgroups
145123
Prove a group generated by two involutions is dihedral
23533
All subgroups normal $\implies$ abelian group
1990
Results for elements in Dihedral Groups: $x \notin \langle r\rangle  \Rightarrow rx = xr^{-1}$
123610
How to show that the commutator subgroup is a normal subgroup
27507
Subgroups of Symmetric groups isomorphic to dihedral group
16804
Prove whether or not a subgroup is normal in the dihedral group $D_4$
48369
discrete subgroups of euclidean space
2254
Finite group with isomorphic normal subgroups and non-isomorphic quotients?
46260
Prove that a group generated by two elements of order $2$, $x$ and $y$, is isomorphic to $D_{2n}$, where $n = |xy|.$