Proving following ring isomorphism
42552
Localisation is isomorphic to a quotient of polynomial ring
48009
Left inverse implies right inverse in a finite ring
86174
Finding an isomorphism between these two finite fields
30327
$\ker \phi = (x_1-a_1, ..., x_n-a_n)$ for a ring homomorphism $\phi: R[x_1, ..., x_n] \to R$
97608
Showing a Ring of endomorphisms is isomorphic to a Ring
121465
$R[x]$ has a subring isomorphic to $R$.
57166
Showing that $\Bbb R[x] / \langle x^2 + 1 \rangle$ is isomorphic to $\Bbb C$ question
149973
Showing the following coordinate rings are not isomorphic
16643
A slick proof that a field which is finitely generated as a ring is finite
115663
Proving an isomorphism using the isomorphism theorems
82559
Showing two ring homomorphisms that agree on the integers must agree on the rationals
91222
Isomorphism between $\mathfrak o(4,\mathbb R)$ and $\mathfrak o (3,\mathbb R) \oplus\mathfrak o (3,\mathbb R) $
105887
Ring and Subring with different Identities
36137
Prove $GL_2(\mathbb{Z}/2\mathbb{Z})$ is isomorphic to $S_3$
111104
Ring theory notation question
137739
Prove that the group isomorphism $\mathbb{Z}^m \cong \mathbb{Z}^n$ implies that $m = n$
77757
Infer the second isomorphism theorem from the first one