Isomorphism between polynomial rings and its restriction
18330
Does $R[x] \cong S[x]$ imply $R \cong S$?
140865
Rings' second isomorphism theorem
117131
Canonical Isomorphism Between $\mathbf{V}$ and $(\mathbf{V}^*)^*$
86174
Finding an isomorphism between these two finite fields
82771
Proving that any polynomial $p:\mathbb{R}\rightarrow \mathbb{R}$ is not bounded, but its restriction to any bounded set is bounded
90433
Isomorphisms between $(\mathbb Z_4,+)$ and $(U_5,*)$
115129
Constructing an explicit isomorphism between finite extensions of finite fields
48818
Homomorphism of local rings
120035
Pattern in Isomorphisms between $\mathbb Z_m \times \mathbb Z_n$ and $\mathbb Z_{mn}$
89864
Units in finite polynomial rings
93017
Isomorphism between $\Bbb R$ and $\Bbb R(X)$?
34990
Ring homomorphism defined on a field
45179
When does the isomorphism $G\simeq \ker(\phi)\times \operatorname{im}(\phi)$? hold?
120968
Isomorphism of stabilizer over $S_n$ to $S_{n-1}$
19346
Isomorphism of affine varieties
37928
Isomorphism between $D_{2n}/Z(D_{2n})$ and $D_n$
21578
Showing the minimal polynomial for an element in an extension field is the same as the minimal polynomial of a linear transformation.