Bijection between natural numbers $\mathbb{N}$ and natural plane $\mathbb{N} \times \mathbb{N}$
31391
bijection between $\mathbb{N}$ and $\mathbb{N}\times\mathbb{N}$
93964
Proving that $f$ is a bijection from $N$x$N$ to $N$.
108922
Cardinality and infinite sets: naturals, integers, rationals, bijections
82003
Bijection between sets of ideals
125008
Define a bijection between $Z^{X \cup Y}$ and $Z^X \times Z^Y$, where $X, Y \in \mathcal{P}(\Omega) $ and $X \cap Y = \emptyset$
78847
Bijection between Prime numbers and Natural numbers
102299
Bijection between $\mathbb{R}^n$ and $\mathbb{R}^m$
124847
Is the set of surjective functions from $\mathbb{N}$ to $\mathbb{N}$ uncountable?
114916
$\mathbb Z_{mn}$ isomorphic to $\mathbb Z_m\times\mathbb Z_n$ whenever $m$ and $n$ are coprime
141114
Question about a bijection between $\mathbb R$ and $\mathbb R \cup \{\infty\}$
15909
Bijection from $\mathbb R$ to $\mathbb {R^N}$
39231
Construct a bijection between $\mathbb{Z}^+\times \mathbb{Z}^+$ and $\mathbb{Z}^+$
132311
T$\mathbb{S}^{n} \times \mathbb{R}$ is diffeomorphic to $\mathbb{S}^{n}\times \mathbb{R}^{n+1}$
77957
How is $\mathbb N$ actually defined?
18343
Counting homomorphisms between $\Bbb Z$ and $\Bbb Z_n$ and also between $\Bbb Z_n$ and $\Bbb Q$
5699
The number of ring homomorphisms from $\mathbb{Z}_m$ to $\mathbb{Z}_n$
28692
Find if set $I$ of all injective functions $\mathbb{N} \rightarrow \mathbb{N}$ is equinumerous to $\mathbb{R}$