Show that a function from $\mathbb{N^2}$ to $\mathbb{N}$ is bijective
38286
Proving the Cantor Pairing Function Bijective
143831
Showing $\mathbb{Q}$ is homeomorphic to $\mathbb{Q}^2$
24107
Bijection $f:\mathcal{P}(A)\to(A\to \{0,1\})$
157268
Proving a bijection with absolute value
32340
Continuous bijections and their inverses
38364
Showing that $x^n -2$ is irreducible in $\mathbb{Q}[X]$
64583
Number of surjective functions from A to B
35953
Prove that a function is not injective
128766
Show that the set of functions $\mathbb{N}\to\{0,1\}$ is not countable
44717
Does there exist a bijective $f:\mathbb{N} \to \mathbb{N}$ such that $\sum f(n)/n^2$ converges?
124847
Is the set of surjective functions from $\mathbb{N}$ to $\mathbb{N}$ uncountable?
102299
Bijection between $\mathbb{R}^n$ and $\mathbb{R}^m$
34260
Injective function from $\mathbb{R}^2$ to $\mathbb{R}$?
141114
Question about a bijection between $\mathbb R$ and $\mathbb R \cup \{\infty\}$
110662
Show that $P(\mathbb{N})$ is equivalent to $2^\mathbb{N}$
93964
Proving that $f$ is a bijection from $N$x$N$ to $N$.
31391
bijection between $\mathbb{N}$ and $\mathbb{N}\times\mathbb{N}$