Automorphisms of $\mathbb{Z}[x]$
141124
Automorphisms of the ring $\Bbb Z[x]$ of polynomials with integer coefficients
138258
What is the injective envelope of $\mathbb{Z}/n\mathbb{Z}$?
93169
Show that $(\mathbb Z[x],+)$ and $(\mathbb Q_{>0},\cdot)$ are isomorphic groups
155745
Ideals of $\mathbb{Z}[X]$
141984
Find the number of homomorphisms between $\mathbb{Z}_m$ and $\mathbb{Z}_n$
87617
Ring of $\mathbb{Z}_2$-valued functions
143069
What are the direct summands in $\mathbb{Z}^n$?
119297
Finding invertible polynomials in polynomial ring $\mathbb{Z}_{n}[x]$
151699
Group of inner automorphisms of a group $G$
109610
Is $\mathbb{R}[X]/(P)$ isomorphic to $\mathbb C$ for every irreducible polynomial $P$ of degree $2?$
19884
The units of $\mathbb Z_4[x]$
102112
Idempotents in $\mathbb Z_n$
130745
Action of finite group of automorphisms on Spec A
78835
An automorphism of the field of $p$-adic numbers
26749
$\mathbb{Z}[X]/(X^2-1)$ is not isomorphic with $\mathbb{Z}\times \mathbb{Z}$
65900
Show that a finite group with certain automorphism is abelian
43759
Prove that the set $\mathrm{Aut}(G)$ of all automorphisms of the group $G$ with the operation of taking the composition is a group