List questions from pi

Published on 21 Sep 2021 - 1:32

74

Views

Proving that the n-dimensional Wallis sieve has the same hypervolume as the n-ball

Published on 02 Apr 2026 - 6:42

175

Views

Are $\pi$ and $\tan^{-1}\left(2\right)$ rational multiples of each other?

Published on 23 Feb 2026 - 4:30

148

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Why this is equal to $\pi$?

Published on 03 Apr 2026 - 3:31

414

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An uncommon continued fraction of $\frac{\pi}{2}$

Published on 31 Mar 2026 - 13:14

78

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Why Stirling formula at n = -1 and n= -2 is so close to 2pii

Published on 17 Oct 2021 - 19:39

181

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Is $\frac{0}{\pi}$ rational?

Published on 19 Oct 2021 - 18:29

101

Views

Seeking infinite product representations of $\pi$ (other than Wallis)

Published on 03 Apr 2026 - 3:36

180

Views

Request for proof: Regularity of pi's continued fractions

Published on 31 Mar 2026 - 13:07

188

Views

Why does $\int_{-\infty}^\infty \operatorname{sech} x \, \mathrm{d}x =\pi\;$?

Published on 30 Mar 2026 - 16:52

132

Views

What is the integral of the secant between $0$ and $\pi$?

Published on 30 Oct 2021 - 18:08

575

Views

Is there a unit equal to 2pi radians?

Published on 27 Mar 2026 - 16:02

271

Views

How is e to the hyperbola what pi is to the circle?

Published on 23 Feb 2026 - 21:15

149

Views

Proving $\pi^2=18\sum_{n=0}^{\infty}\frac{n!n!}{(2n+2)!}$

Published on 07 Nov 2021 - 19:07

60

Views

Eulers number divided by Pi

Published on 08 Nov 2021 - 11:31

List Question

Digits of pi using rudimentary math and tools

Proving that the n-dimensional Wallis sieve has the same hypervolume as the n-ball

Are $\pi$ and $\tan^{-1}\left(2\right)$ rational multiples of each other?

Why this is equal to $\pi$?

An uncommon continued fraction of $\frac{\pi}{2}$

Why Stirling formula at n = -1 and n= -2 is so close to 2pii

Is $\frac{0}{\pi}$ rational?

Seeking infinite product representations of $\pi$ (other than Wallis)

Request for proof: Regularity of pi's continued fractions

Why does $\int_{-\infty}^\infty \operatorname{sech} x \, \mathrm{d}x =\pi\;$?

What is the integral of the secant between $0$ and $\pi$?

Is there a unit equal to 2pi radians?

How is e to the hyperbola what pi is to the circle?

Proving $\pi^2=18\sum_{n=0}^{\infty}\frac{n!n!}{(2n+2)!}$

Eulers number divided by Pi

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