Question

Does a monotonic bijection from $\mathbb{Q}$ to $\mathbb{Q}\setminus\{0\}$ exist?

score 272 · Answer 1 · 2026-03-25 11:10:18

272

Views

Does a monotonic bijection from $\mathbb{Q}$ to $\mathbb{Q}\setminus\{0\}$ exist?

Published on 25 Mar 2026 - 11:10

score 2.7k · Answer 2 · 2026-03-27 03:43:13

2.7k

Views

Derivation of the Safety Stock Formula on Wikipedia

Published on 27 Mar 2026 - 3:43

score 123 · Answer 3 · 2026-03-25 09:50:01

123

Views

Existence of $x\in \mathcal{X}$ such that $\|x\|=1$ and $\|x+\mathcal{M}\|=1$ for a closed subspace $\mathcal{M}$

Published on 25 Mar 2026 - 9:50

score 151 · Answer 4 · 2018-08-15 06:57:52

151

Views

What is the considered topology in the problem and Proof verification : $\pi$ is closed but not open (map)

Published on 15 Aug 2018 - 6:57

score 509 · Answer 5 · 2026-03-26 15:16:38

509

Views

Convergence of a logarithmic sequence

Published on 26 Mar 2026 - 15:16

score 525 · Answer 6 · 2026-03-27 22:57:36

525

Views

Completing the proof of that the set of points where $f(x)=0 $ is a $k$-manifold

Published on 27 Mar 2026 - 22:57

score 390 · Answer 7 · 2018-08-15 08:07:20

390

Views

$\operatorname{char}(F)=0$ or a prime number

Published on 15 Aug 2018 - 8:07

score 51 · Answer 8 · 2026-03-29 00:00:09

51

Views

Proof verification : $D^2 = \{(x,y)\in \Bbb R^2 : x^2 + y^2 \leq1\}$ is not homeomorphic to $\{-1,1\}\times D^2$

Published on 29 Mar 2026 - 0:00

score 332 · Answer 9 · 2026-04-06 01:21:37

332

Views

Is this proof of almost sure convergence correct

Published on 06 Apr 2026 - 1:21

score 1.3k · Answer 10 · 2018-08-15 13:59:27

If the set $X$ is linearly independent in and does not span $V=\Bbb{R}^n$ then there is a $v\in V$ s.t. $\{v\}\cup X$ is linearly independent

score 63 · Answer 11 · 2018-08-15 16:57:58

63

Views

Prove: $f(\bigcup_{i\in I}A_i)=\bigcup_{i\in I}f(A_i)$

Published on 15 Aug 2018 - 16:57

score 83 · Answer 12 · 2018-08-15 19:04:10

83

Views

Proof of simple inequality using only fundamental axioms

Published on 15 Aug 2018 - 19:04

score 78 · Answer 13 · 2026-03-25 15:53:36

78

Views

Find $\dim\ker(A-B)$ if the minimal polynomials of $A$ and $B$ are given

Published on 25 Mar 2026 - 15:53

score 182 · Answer 14 · 2018-08-15 20:57:49

182

Views

Understanding this proof about the principle of the maximum

Published on 15 Aug 2018 - 20:57

score 86 · Answer 15 · 2026-03-26 19:27:45

86

Views

Smallest $C^*$-subalgebra in tensor product

Published on 26 Mar 2026 - 19:27

List Question

Does a monotonic bijection from $\mathbb{Q}$ to $\mathbb{Q}\setminus\{0\}$ exist?

Derivation of the Safety Stock Formula on Wikipedia

Existence of $x\in \mathcal{X}$ such that $\|x\|=1$ and $\|x+\mathcal{M}\|=1$ for a closed subspace $\mathcal{M}$

What is the considered topology in the problem and Proof verification : $\pi$ is closed but not open (map)

Convergence of a logarithmic sequence

Completing the proof of that the set of points where $f(x)=0 $ is a $k$-manifold

$\operatorname{char}(F)=0$ or a prime number

Proof verification : $D^2 = \{(x,y)\in \Bbb R^2 : x^2 + y^2 \leq1\}$ is not homeomorphic to $\{-1,1\}\times D^2$

Is this proof of almost sure convergence correct

If the set $X$ is linearly independent in and does not span $V=\Bbb{R}^n$ then there is a $v\in V$ s.t. $\{v\}\cup X$ is linearly independent

Prove: $f(\bigcup_{i\in I}A_i)=\bigcup_{i\in I}f(A_i)$

Proof of simple inequality using only fundamental axioms

Find $\dim\ker(A-B)$ if the minimal polynomials of $A$ and $B$ are given

Understanding this proof about the principle of the maximum

Smallest $C^*$-subalgebra in tensor product

Trending Questions

Popular # Hahtags

Popular Questions