Is it possible to define a bijection from nonnegative to positive numbers?
10458
How to define a bijection between $(0,1)$ and $(0,1]$?
21663
Bijection between power sets of sets implies bijection between sets?
23464
How to find a explicit bijection for some $f:A\times B \rightarrow B \times A$
104920
Can we find positive integers $a$ and $k \geq 2$ with $2^n - 1 = a^k$?
41359
Constructing a bijection
52348
Counting the number of surjections.
136538
How can I show that a bijection between $[0,1)$ and $(0,1)$ cannot be continuous?
32340
Continuous bijections and their inverses
103581
Which positive integers can NOT be written as a sum of consecutive positive integers
124333
A bijection between $\mathbb{N}$ and $\mathbb{P}(\mathbb{N})$?
49833
Simple bijection $\mathbb N_0 \times \mathbb N_0 \to \mathbb N_0$
53101
Is it true that the relation |A| < |B| is a sufficient condition for claiming that $f$ is a bijection?
72642
Continuous bijection from $(a,b) \to S^1$?
149489
30 positive integers
67208
Can we say that there exist an integer $n$ such $A+nB$ invertible?
44689
Explicit bijection between $[0,1)$ and $(0,1)$
24107
Bijection $f:\mathcal{P}(A)\to(A\to \{0,1\})$