Bijection between homomorphisms $\mathbb Z[i]\to R$ and set $x\in R$ with $x^2+1=0$
119702
Showing a bijection between the set of ringhomomorphisms $\mathbb{Z}[i] \to R$ and the set of $x \in R$ for which $x^2+1=0$
72642
Continuous bijection from $(a,b) \to S^1$?
31391
bijection between $\mathbb{N}$ and $\mathbb{N}\times\mathbb{N}$
39231
Construct a bijection between $\mathbb{Z}^+\times \mathbb{Z}^+$ and $\mathbb{Z}^+$
152306
Finding homomorphisms from $\mathbb Z_{12}$ to $\mathbb Z_{6}$.
5906
All group homomorphism from $ \mathbb{Z} _m $ to $\mathbb{Z}_n $
13717
Homomorphisms from $S_4$ to $\mathbb Z_2$
127365
Question on showing a bijection between $\pi_1(X,x_0)$ and $[S^1, X]$ when X is path connected.
121244
Homomorphisms and automorphisms on polynomial rings
18343
Counting homomorphisms between $\Bbb Z$ and $\Bbb Z_n$ and also between $\Bbb Z_n$ and $\Bbb Q$
93776
Bijective mapping between $\mathbb{R}^2$ and $\mathbb{R}$?
27188
Bijection between $\mathbb{R}$ and $\mathbb{R}/\mathbb{Q}$
145722
Prove there is a bijection between the set of $R[x]$-module structures on $M$ and $\mathrm{End}_{R-\mathsf{Mod}}(M)$.
143451
Homomorphism from $(\Bbb Q,+)$ to a finite group
28692
Find if set $I$ of all injective functions $\mathbb{N} \rightarrow \mathbb{N}$ is equinumerous to $\mathbb{R}$
125008
Define a bijection between $Z^{X \cup Y}$ and $Z^X \times Z^Y$, where $X, Y \in \mathcal{P}(\Omega) $ and $X \cap Y = \emptyset$
128966
Explicit bijection between $\Bbb R$ and permutations of $\Bbb N$