Define bijection $Z^X \times Z^Y$ and $Z^{X \cup Y}$
125008
Define a bijection between $Z^{X \cup Y}$ and $Z^X \times Z^Y$, where $X, Y \in \mathcal{P}(\Omega) $ and $X \cap Y = \emptyset$
57816
$(S^1 \times [0,1])/\sim$ homeomorphic to unit disk $ D^2$
14277
Proving $f(x)=x\cdot |x|$ is a bijection
82003
Bijection between sets of ideals
45991
Why $f\colon \mathbb{Z}_n^\times \to \mathbb{Z}_m^\times$ is surjective?
93776
Bijective mapping between $\mathbb{R}^2$ and $\mathbb{R}$?
4156
What is $\Bbb R^{\times}$? [unit group, ring to "times" power]
30021
Bijection between set of all binary sequences and power set of $\mathbb N$.
70861
$\mathbb P^n\times \mathbb P^m\not\cong \mathbb P^{m+n}$
26749
$\mathbb{Z}[X]/(X^2-1)$ is not isomorphic with $\mathbb{Z}\times \mathbb{Z}$
32340
Continuous bijections and their inverses
40868
Composition of two functions - Bijection
87289
Find the multiplicative inverses of all the elements in $\Bbb Z_{16}^\times$
137285
Prove $\mathbb{Z}_2 \times \mathbb{Z}_2$ is not isomorphic to $\mathbb{Z}_4$
13253
Prove $f(S \cup T) = f(S) \cup f(T)$
21663
Bijection between power sets of sets implies bijection between sets?
64130
Prove that $\mathbb{Q}^{\times}$ not isomorphic to $\mathbb{Z}^{n}$