Does block product(=inner product) of the normal subgroups are commutative?
139611
Can a normal subgroup of a finite nonabelian group be nonabelian?
151910
Why is $K^{\ast n}$ contained in the norm group?
142894
Showing that a group of order $pq$ is cyclic if it has normal subgroups of order $p$ and $q$
41237
$H$ is normal subgroup of $G$ iff $gHg^{-1}=H$ for every $g$ of $G$
70298
Are quotients of chain groups $C_n(X)/C_n(A)$ still free?
104505
Is every normal subgroup the kernel of some endomorphism?
18839
Proof about inner product space $\vert \langle x,y\rangle \vert=\Vert x \Vert\Vert y \Vert$
78580
Is $SL_n(\mathbb{R})$ a normal subgroup in $GL_n(\mathbb{R})$?
122266
equivalent definition of normal subgroup
85508
Prove that $G$ is an abelian group if $\{(g, g):g\in G\}$ is a normal subgroup.
139096
$|AxA|$ is a constant implies normal subgroup
3456
Commutator of two normal subgroups with trivial intersections
99999
A question on identifying normal subgroups of $S_4$
151130
When is the product of $n$ subgroups a subgroup?
105170
About product of $k$ commutators
152196
About inner products, norms and metrics
38687
Isomorphism of a product $C_n \times C_m$ of cyclic groups with the cyclic group $C_{mn}$