Does there exist an epimorphism from the ring $\mathbb{Z_{24}}$ onto the ring $\mathbb{Z_{7}}$?
93632
Existence of a ring homomorphism implies characteristic divisibility
134686
$D_3\oplus D_4$ not isomorphic to $D_{24}$
91129
Can there be an onto homomorphism from a ring without unity to a ring with unity?
97258
Give $\ker(\phi)$ for $\phi: \mathbb{Z} \to \mathbb{Z_7}$ such that $\phi(1)=4$
74330
$\mathbb{R}^n$ not homeomorphic to open subset of $\mathbb{R}^m$
90433
Isomorphisms between $(\mathbb Z_4,+)$ and $(U_5,*)$
128493
Given a commutative ring $R$ and an epimorphism of free modules $R^m \to R^n$ is then $m \geq n$?
5699
The number of ring homomorphisms from $\mathbb{Z}_m$ to $\mathbb{Z}_n$
143069
What are the direct summands in $\mathbb{Z}^n$?
141124
Automorphisms of the ring $\Bbb Z[x]$ of polynomials with integer coefficients
152306
Finding homomorphisms from $\mathbb Z_{12}$ to $\mathbb Z_{6}$.
84823
When is the group of units in $\mathbb{Z}_n$ cyclic?
144105
Ring homomorphism from $\mathbb Z$ to $\mathbb Z$ is always identity or $0$
33781
Is $\mathbb{Z}[x]/(x^2+1)$ isomorphic to $\mathbb{Z}[i]$?
129162
Show there is a surjective homomorphism from $\mathbb{Z}\ast\mathbb{Z}$ onto $C_2\ast C_3$
11935
Is $\mathbb{Z} \left[ \frac{1+i \sqrt{7}}{2} \right]$ euclidean?
64025
Ring homomorphisms from $\Bbb Q$ into a ring