Homomorphism between $\mathbb Z$ and an arbitrary group.
2153
How to get a homomorphism from $\mathbb{Z}\to G$, for $G$ a non-trivial group?
151993
Ring homomorphisms $\mathbb Z[x]\rightarrow \mathbb Q$
142851
Every group homomorphism from $(\mathbb{Q}, +)$ to $(\mathbb{Q}, \times)$ is the trivial map.
32428
Group homomorphisms and which of the following statements are true (NBHM-$2014$)
27728
Question on a homomorphism of a set G.
112131
Characterizing all ring homomorphisms $C[0,1]\to\mathbb{R}$.
6825
If $f: \mathbb Q\to \mathbb Q$ is a homomorphism, prove that $f(x)=0$ for all $x\in\mathbb Q$ or $f(x)=x$ for all $x$ in $\mathbb Q$.
82559
Showing two ring homomorphisms that agree on the integers must agree on the rationals
157915
Isomorphism between the group $(\mathbb Z[x], +)$ and $(\mathbb Q_{>0}, .)$
159005
Finding all homomorphisms between two groups - couple of questions
64419
How to construct a homomorphism from an abelian group to $\mathbb{Q}/\mathbb{Z}$?
133019
Nilpotent elements in $\mathbb Z_n$
40400
Finding an isomorphism between $\mathbb{Z}[i]/(7)$ and $\mathbb{Z}[\sqrt{-2}]/(7)$
89415
Number of homomorphisms from $(\mathbb Q^+ , \,\cdot\,)$ to $(\mathbb Z_n , +)$
126930
Finding all group homomorphisms of $S_n\to\mathbb{C}^*$ and $A_n\to\mathbb{C}^*$
40069
The image of a homomorphism is a group?
47623
The set of all complex homomorphisms of abelian group $G$ has the same structure as $G$