Question

Cardinality: Is the last sum correct?

score 85 · Answer 1 · 2016-12-20 04:04:59

85

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Cardinality: Is the last sum correct?

Published on 20 Dec 2016 - 4:04

score 290 · Answer 2 · 2026-03-31 17:52:18

290

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How to prove$\int_0^{\pi}f(x)\sin{x}\,dx$is a integer

Published on 31 Mar 2026 - 17:52

score 63 · Answer 3 · 2016-12-20 18:42:58

63

Views

The length of the repeated sequence of a rational number

Published on 20 Dec 2016 - 18:42

score 78 · Answer 4 · 2026-03-25 18:56:24

78

Views

Density function for ${frac(\frac{N}{i})}_{i=1}^{i=N}$ in the limit $N \to \infty$

Published on 25 Mar 2026 - 18:56

score 56 · Answer 5 · 2016-12-22 18:16:42

56

Views

Proof of "'$x \in R$ being rational and the denominator of its min expression being $2^a5^b$' implying that it has a finite decimal expansion"

Published on 22 Dec 2016 - 18:16

score 1k · Answer 6 · 2026-03-29 07:29:19

1k

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Find what level of the Calkin–Wilf tree a number is on

Published on 29 Mar 2026 - 7:29

score 3.1k · Answer 7 · 2026-03-27 18:22:43

3.1k

Views

Rational numbers are measure zero

Published on 27 Mar 2026 - 18:22

score 1.1k · Answer 8 · 2026-04-01 19:16:02

1.1k

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Alternative proof and hints for: "rationals are dense in the reals" from Rudin's real analysis book

Published on 01 Apr 2026 - 19:16

score 1.2k · Answer 9 · 2016-12-26 18:27:20

1.2k

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Generalizing the Rational Roots Theorem to complex rational roots

Published on 26 Dec 2016 - 18:27

score 6.1k · Answer 10 · 2016-12-27 22:37:33

6.1k

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What does m/n = m'/n' iff mn'=m'n mean when talking about Rational numbers in Infinite sets?

Published on 27 Dec 2016 - 22:37

score 148 · Answer 11 · 2016-12-30 22:05:07

148

Views

What actually "forces" us to define the operations on $\mathbb{Q}$ the way they are?

Published on 30 Dec 2016 - 22:05

score 42 · Answer 12 · 2017-01-01 13:25:54

42

Views

What's the proof that ${\forall}z\,{\in}\,\mathbb{Z}^*:[[0_{\mathbb{Z}},z]]_{\boxtimes}$ is the zero of rational numbers?

Published on 01 Jan 2017 - 13:25

score 766 · Answer 13 · 2026-03-28 08:37:03

766

Views

Are any constants (from analysis) rational?

Published on 28 Mar 2026 - 8:37

score 161 · Answer 14 · 2026-03-30 06:46:58

161

Views

Divisibility involving the product (ad+bc)(ac+bd)

Published on 30 Mar 2026 - 6:46

score 585 · Answer 15 · 2026-03-31 22:22:03

585

Views

Absolute value rational inequality

Published on 31 Mar 2026 - 22:22

List Question

Cardinality: Is the last sum correct?

How to prove$\int_0^{\pi}f(x)\sin{x}\,dx$is a integer

The length of the repeated sequence of a rational number

Density function for ${frac(\frac{N}{i})}_{i=1}^{i=N}$ in the limit $N \to \infty$

Proof of "'$x \in R$ being rational and the denominator of its min expression being $2^a5^b$' implying that it has a finite decimal expansion"

Find what level of the Calkin–Wilf tree a number is on

Rational numbers are measure zero

Alternative proof and hints for: "rationals are dense in the reals" from Rudin's real analysis book

Generalizing the Rational Roots Theorem to complex rational roots

What does m/n = m'/n' iff mn'=m'n mean when talking about Rational numbers in Infinite sets?

What actually "forces" us to define the operations on $\mathbb{Q}$ the way they are?

What's the proof that ${\forall}z\,{\in}\,\mathbb{Z}^*:[[0_{\mathbb{Z}},z]]_{\boxtimes}$ is the zero of rational numbers?

Are any constants (from analysis) rational?

Divisibility involving the product (ad+bc)(ac+bd)

Absolute value rational inequality

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