What is an example of a non-zero "ring pseudo-homomorphism"?
1026
Ring homomorphism with $\phi(1_R) \neq1_S$
34599
Number of ring homomorphisms from $\mathbb Z_{12}$ to $\mathbb Z_{28}$.
119648
For which $n$ and $k$ are there nontrivial homomorphisms from $S_n$ to $\mathbb{Z}/k\mathbb{Z}$?
144105
Ring homomorphism from $\mathbb Z$ to $\mathbb Z$ is always identity or $0$
57283
Extending Homomorphism into Algebraically Closed Field
7010
Example of two non-isomorphic fields which embed inside each other
51334
Does there exist any surjective group homomorphism from $(\mathbb R^* , .)$ onto $(\mathbb Q^* , .)$?
34990
Ring homomorphism defined on a field
127030
Simple example of non-arithmetic ring (non-distributive ideal lattice)
111679
Example of a ring without unity that has a subring with unity?
6385
Minimal counterexamples of the isomorphism problem for integral group rings
642
Does a surjective ring homomorphism have to be surjective on the unit groups?
64025
Ring homomorphisms from $\Bbb Q$ into a ring
112263
an example for $\pi$-quasinormal subgroup but is not normal
25764
Example of a ring such that $R^2\simeq R^3$, but $R\not\simeq R^2$ (as $R$-modules)
32127
Example where $f\circ g$ is bijective, but neither $f$ nor $g$ is bijective
61491
Complex Ring Isomorphism