Determine all ring homomorphisms from $ \Bbb Z$ $\oplus$ $\Bbb Z $ to $\Bbb Z$.
64048
Describe all ring homomorphisms
642
Does a surjective ring homomorphism have to be surjective on the unit groups?
47623
The set of all complex homomorphisms of abelian group $G$ has the same structure as $G$
147667
Polynomial ring isomorphisms
67237
Pull back image of maximal ideal under surjective ring homomorphism is maximal
120035
Pattern in Isomorphisms between $\mathbb Z_m \times \mathbb Z_n$ and $\mathbb Z_{mn}$
128711
$(\Bbb Z\oplus \Bbb Z)[X] \not\cong \Bbb Z[X]\oplus \Bbb Z[X]\,$?
126930
Finding all group homomorphisms of $S_n\to\mathbb{C}^*$ and $A_n\to\mathbb{C}^*$
34599
Number of ring homomorphisms from $\mathbb Z_{12}$ to $\mathbb Z_{28}$.
33455
Question on group homomorphisms involving the standard Z-basis
144105
Ring homomorphism from $\mathbb Z$ to $\mathbb Z$ is always identity or $0$
137011
showing $\psi: R\to \mathbb C$ is ring isomorphism.
5906
All group homomorphism from $ \mathbb{Z} _m $ to $\mathbb{Z}_n $
140557
Counting ring homomorphisms from $\mathbb{Z}[x,y]/(x^3+y^2-1)$ to $\mathbb{Z_7}$
148616
When is a ring homomorphism $A \to A$ surjective but not injective.
55900
Is there a ring homomorphism $M_2(\mathbb Z)\to \mathbb Z$?
89415
Number of homomorphisms from $(\mathbb Q^+ , \,\cdot\,)$ to $(\mathbb Z_n , +)$