Zorn's Lemma and Theorem of Ring Theory.
63207
Zorn's lemma and maximal ideals
121244
Homomorphisms and automorphisms on polynomial rings
26661
Ring homomorphisms from $\mathbb{Z}_n$ to $\mathbb{Z}_m$
60111
On the converse of Schur's Lemma
6385
Minimal counterexamples of the isomorphism problem for integral group rings
129371
Maximal ideals in the ring of real functions on $[0,1]$
144572
Proof that ideals in $C[0,1]$ are of the form $M_c$ that should not involve Zorn's Lemma
119067
Basic Ring Theory Question involving the unit element
50809
Proving $R-S$ contains a prime ideal when $S$ is a multiplicative set
1719
Ideals in the ring of Gaussian integers
1425
The Chinese Remainder Theorem for Rings.
138298
Learning about Grothendieck's Galois Theory.
17978
Isomorphism classes of $\mathbb{Z}[i]$ modules.
116000
Prove that prime ideals of a finite ring are maximal
110984
Ideals and prime ideals in a commutative ring.
152013
elementary ring proof with composition of functions and addition of functions as operations
41629
Structure of ideals in the product of two rings