Ring isomorphism for coprime a,b
114916
$\mathbb Z_{mn}$ isomorphic to $\mathbb Z_m\times\mathbb Z_n$ whenever $m$ and $n$ are coprime
45576
A surjective homomorphism between finite free modules of the same rank
40490
Birational isomorphism $\mathbb{P}^n\times \mathbb{P}^m\to \mathbb{P}^{n+m}$
147667
Polynomial ring isomorphisms
26661
Ring homomorphisms from $\mathbb{Z}_n$ to $\mathbb{Z}_m$
36980
Prove the third isomorphism theorem
57732
Rings of fractions and homomorphisms
30236
isomorphic groups related in direct product.
52556
Isomorphism of $S^1$.
17978
Isomorphism classes of $\mathbb{Z}[i]$ modules.
128443
Isomorphism between finite groups
119702
Showing a bijection between the set of ringhomomorphisms $\mathbb{Z}[i] \to R$ and the set of $x \in R$ for which $x^2+1=0$
5699
The number of ring homomorphisms from $\mathbb{Z}_m$ to $\mathbb{Z}_n$
3778
If the matrix rings over two Rings of the same size are isomorphic, then the scalar rings are isomorphic
52088
Isomorphism of an endomorphism ring, how can $R\cong R^2$?
64048
Describe all ring homomorphisms
136389
Finding an isomorphic subring of matrices