List questions from rational-numbers

Published on 06 Dec 2019 - 8:55

220

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Let $f, g : [0, 1] \to [0, 1]$ be continuous functions that agree on the rationals inside $[0, 1]$. Show that $f = g$.

Published on 07 Dec 2019 - 3:05

81

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Why do we see the sets in this order?

Published on 29 Mar 2026 - 9:09

76

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Proving that $\mathbb{R}$ is a field

Published on 12 Dec 2019 - 19:04

544

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Is every integer a rational number?

Published on 21 Dec 2019 - 22:43

567

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open balls and rational centers and radii

Published on 23 Dec 2019 - 10:01

59

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Is this harmonic number in lowest terms?

Published on 27 Mar 2026 - 2:34

227

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Show that $a^2+b^2+c^2$ is a square when $\frac{1}{a}+\frac{1}{b} = \frac{1}{c}$ and $a,b,c\in\mathbb{Q}$

Published on 25 Dec 2019 - 12:54

234

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Question about 12-tone musical scale and rational approximations

Published on 23 Feb 2026 - 4:05

137

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Number theory prime number conjecture

Published on 25 Dec 2019 - 16:07

59

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Subsets $A$ of rational numbers with $| \Bbb{Q} \setminus (A-A)|=2m$

Published on 25 Mar 2026 - 11:06

59

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$0 < \frac{a}{b}, \frac{c}{d} < 1$, when do we have $\frac{a+c}{b+d} = \frac{a}{b} + \frac{c}{d}$?

Published on 29 Mar 2026 - 15:54

277

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Are binary, octal, decimal and hexadecimal numbers natural, whole, integer, real numbers?

Published on 27 Mar 2026 - 21:35

1.3k

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Best possible rational approximation of $\pi$

Published on 27 Mar 2026 - 14:45

519

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left riemann sum of dirichlet function

Published on 27 Mar 2026 - 7:41

List Question

Questions regarding subrings of $\Bbb Q$

Let $f, g : [0, 1] \to [0, 1]$ be continuous functions that agree on the rationals inside $[0, 1]$. Show that $f = g$.

Why do we see the sets in this order?

Proving that $\mathbb{R}$ is a field

Is every integer a rational number?

open balls and rational centers and radii

Is this harmonic number in lowest terms?

Show that $a^2+b^2+c^2$ is a square when $\frac{1}{a}+\frac{1}{b} = \frac{1}{c}$ and $a,b,c\in\mathbb{Q}$

Question about 12-tone musical scale and rational approximations

Number theory prime number conjecture

Subsets $A$ of rational numbers with $| \Bbb{Q} \setminus (A-A)|=2m$

$0 < \frac{a}{b}, \frac{c}{d} < 1$, when do we have $\frac{a+c}{b+d} = \frac{a}{b} + \frac{c}{d}$?

Are binary, octal, decimal and hexadecimal numbers natural, whole, integer, real numbers?

Best possible rational approximation of $\pi$

left riemann sum of dirichlet function

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