Non isomorphic groups who product with Z is isomorphic
15276
$G \times H \cong G \times K$ , then $ K \cong H$
37928
Isomorphism between $D_{2n}/Z(D_{2n})$ and $D_n$
129120
Example of a group $G$ such that $G = N_1\cdots N_n$ and $N_i \cap N_j = \{e\}$ for all $i \neq j$ but $G$ is not the internal direct product of them.
90433
Isomorphisms between $(\mathbb Z_4,+)$ and $(U_5,*)$
91777
Product of Non-Disjoint Cycles
27507
Subgroups of Symmetric groups isomorphic to dihedral group
16259
How many non isomorphic groups of order 30 are there?
93169
Show that $(\mathbb Z[x],+)$ and $(\mathbb Q_{>0},\cdot)$ are isomorphic groups
6385
Minimal counterexamples of the isomorphism problem for integral group rings
126098
Isomorphism of factor groups
92211
When are $\mathbb Z_m$ and $\mathbb Z_n$ homomorphic?
108044
Isomorphic extensions of $\mathbb Z_3$ by $\mathbb Z_3 \times \mathbb Z_3$ which are not equivalent
5741
Direct product of abelian groups
61084
Examples of non-isomorphic fields with isomorphic group of units and additive group structure
98507
$\text{Aut}(F)$ is isomorphic to the multiplicative group of all $n\times n$ matrices over $\mathbb Z$
9074
Example of non-isomorphic structures which are elementarily equivalent
2254
Finite group with isomorphic normal subgroups and non-isomorphic quotients?