Proof of the First Isomorphism Theorem for Rings
46116
Proof of the First Isomorphism Theorem for Groups
61491
Complex Ring Isomorphism
157378
On an injective ring homomorphism from the ring of continuous functions to the ring of differentiable functions
152013
elementary ring proof with composition of functions and addition of functions as operations
157585
Structure theorem of finite rings
44983
Isomorphism of R-modules
68728
Why does the natural ring homomorphism induce a surjective group homomorphism of units?
30327
$\ker \phi = (x_1-a_1, ..., x_n-a_n)$ for a ring homomorphism $\phi: R[x_1, ..., x_n] \to R$
57732
Rings of fractions and homomorphisms
111239
Are monomorphisms of rings injective?
77757
Infer the second isomorphism theorem from the first one
123130
Showing an isomorphism between exterior products of a free module
66169
Ring of order $n$ is isomorphic to $\Bbb Z/n\Bbb Z$, with $n$ square-free
146341
Finding all ring homomorphisms from a field to itself
23279
Group Theory Isomorphism
149856
Image of ring homomorphism is a subring
120288
Semigroup isomorphism