Automorphisms of $C_2\times C_2$.
9140
Show $\operatorname{Aut}(C_2 \times C_2)$ is isomorphic to $S_3=D_6$
129162
Show there is a surjective homomorphism from $\mathbb{Z}\ast\mathbb{Z}$ onto $C_2\ast C_3$
7938
Number of Homomorphisms from $\Bbb{Z}_m$ to $\Bbb{Z}_n$
126930
Finding all group homomorphisms of $S_n\to\mathbb{C}^*$ and $A_n\to\mathbb{C}^*$
94296
Classifying the factor group $(\mathbb{Z} \times \mathbb{Z})/\langle (2, 2) \rangle$
133915
In which case $M_1 \times N \cong M_2 \times N \Rightarrow M_1 \cong M_2$ is true?
66708
Elementary isomorphism between $\operatorname{PSL}(2,5)$ and $A_5$
49242
stab(S) is isomorphic to $ S_k \times S_{n-k} $
155669
$\mathrm{Aut}(D_4)$ is isomorphic to $D_4$
13717
Homomorphisms from $S_4$ to $\mathbb Z_2$
120035
Pattern in Isomorphisms between $\mathbb Z_m \times \mathbb Z_n$ and $\mathbb Z_{mn}$
69694
Classify orbits of conjugating action on $GL_2(\mathbb{C})$
69361
How do you find the automorphism?
27472
Prove that $PSL(2,\mathbb{Z})$ is free product of $C_2$ and $C_3$
146028
$GL(n, \mathbb{C})$ is isomorphic to a subgroup of $GL(2n, \mathbb{R})$
55393
Existence of a group isomorphism between $(\mathbb K,+)$ and $(\mathbb K^\times,\cdot)$
119793
Proving that $D_{12}\cong S_3 \times C_2$