Showing two rings are isomorphic
31263
Quotient rings of Gaussian integers
86922
Ring with 10 elements is isomorphic to $\mathbb{Z}/10 \mathbb{Z} $
109596
Isomorphism from $\mathrm{Aut}(\mathbb{Z}/2\mathbb{Z}\times \mathbb{Z}/2\mathbb{Z})$ to $S_3$
30753
Showing there is no ring whose additive group is isomorphic to $\mathbb{Q}/\mathbb{Z}$
86748
Isomorphism of hom sets implies objects are isomorphic
32772
Proving units in a ring
23579
If $G$ is isomorphic to $H$, then ${\rm Aut}(G)$ is isomorphic to ${\rm Aut}(H)$
66169
Ring of order $n$ is isomorphic to $\Bbb Z/n\Bbb Z$, with $n$ square-free
136389
Finding an isomorphic subring of matrices
65968
Prove that any two cyclic groups of the same order are isomorphic?
73652
Exhibiting an isomorphism between two finite fields
108601
Show structure of a commutative ring in a tensor product
50908
Showing a Ring and an Ideal are equal
36882
Two finite abelian groups with the same number of elements of any order are isomorphic
102371
Proving that two vector spaces of equal dimension are isomorphic
123130
Showing an isomorphism between exterior products of a free module
97999
Explain these ring isomorphisms