Why is this function not a group isomorphism?
47914
Prove $\Bbb{Z}_{100} \times \Bbb{Z}_{10}$ is not isomorphic to $\Bbb{Z}_{1000}$
31421
Transpose inverse automorphism is not inner
97854
Difference between bijection and isomorphism?
95764
Prove that the additive groups $\mathbb{Z}$ and $\mathbb{Q}$ are not isomorphic.
26749
$\mathbb{Z}[X]/(X^2-1)$ is not isomorphic with $\mathbb{Z}\times \mathbb{Z}$
59234
Standard definition of group isomorphism
9074
Example of non-isomorphic structures which are elementarily equivalent
99938
Is the conjugation map always an isomorphism?
18160
How to show that the group of nonzero real numbers under multiplication is not isomorphic to the group of real numbers under addition?
51861
$S_4$ is not isomorphic to $D_{12}$
157915
Isomorphism between the group $(\mathbb Z[x], +)$ and $(\mathbb Q_{>0}, .)$
60925
Why these are isomorphic each other for given these rings?
156679
$K[X,Y]/(XY-1)$ not isomorphic to $K[T]$
29717
Not sure how to go about this group theory proof
126930
Finding all group homomorphisms of $S_n\to\mathbb{C}^*$ and $A_n\to\mathbb{C}^*$
88928
$F:G\to B$ is an isomorphism between groups implies $F^{-1}$ is an isomorphism
128443
Isomorphism between finite groups