Talk:Pi

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Numbers

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Drive-by MOS edits

Perhaps something like this would resolve the question of nested parens:

π

is an irrational number, meaning that it cannot be written as the ratio of two integers—fractions such as

.mw-parser-output .sfrac{white-space:nowrap}.mw-parser-output .sfrac.tion,.mw-parser-output .sfrac .tion{display:inline-block;vertical-align:-0.5em;font-size:85%;text-align:center}.mw-parser-output .sfrac .num{display:block;line-height:1em;margin:0.0em 0.1em;border-bottom:1px solid}.mw-parser-output .sfrac .den{display:block;line-height:1em;margin:0.1em 0.1em}.mw-parser-output .sr-only{border:0;clip:rect(0,0,0,0);clip-path:polygon(0px 0px,0px 0px,0px 0px);height:1px;margin:-1px;overflow:hidden;padding:0;position:absolute;width:1px}⁠22/7⁠

and

⁠ 355 / 113 ⁠

are commonly used to approximate

π

, but no common fraction (ratio of whole numbers) can be its exact value.

or

π

is an irrational number, meaning that it cannot be written as the ratio of two integers. Fractions such as

⁠ 22 / 7 ⁠

and

⁠ 355 / 113 ⁠

are commonly used to approximate

π

, but no common fraction (ratio of whole numbers) can be its exact value.

I agree that the square brackets are awful. Johnuniq (talk) 23:08, 16 March 2020 (UTC)[reply]

The square brackets are awful, but so is having nested parenthetical clauses in any formatting. I prefer your second alternative, with two sentences. —David Eppstein (talk) 23:19, 16 March 2020 (UTC)[reply]

Coprime approximation to pi

There is an insane method of estimating pi given by one R. Chartres in Philosophical Magazine from 1840 based on the probability of coprimality. SpinningSpark 08:24, 20 May 2020 (UTC)[reply]

Lets change DOI on Salikhov, V. (2008). "On the Irrationality Measure of pi"

to 10.1134/S0001434610090294 because SciHub only gives correct article on THAT DOI. 2A00:1FA0:44DF:31F8:C1A6:49C:82FC:FAA8 (talk) 16:53, 1 July 2020 (UTC)[reply]

Semi-protected edit request on 3 July 2020

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Please add the missing word (in bold):
The invention of calculus soon led to the calculation of hundreds of digits of π, enough for all practical scientific computations. 95.49.71.94 (talk) 16:25, 3 July 2020 (UTC)[reply]

Done, thanks! ‑‑ElHef (Meep?) 16:49, 3 July 2020 (UTC)[reply]

Defining π with circumference without integral calculus

In his book, Remmert referred to integral definitions, not to the circumference definition. Not all definitions of π with circumference rely on integral calculus. You can use polygonal paths and then define arc length as a limit of a sum of certain lengths of line segments. This does not make use of derivatives and integrals. You can then prove that this definition is equivalent to the integral-derivative definition of arc length, but you do not have to. The "Definition" subsection should be edited accordingly. A1E6 (talk) 16:06, 9 July 2020 (UTC)[reply]

Please use LaTeX font because it's better and more requests

For example: $π$ more like $\pi$ or use the symbol of pi in all pages with the word "pi" in its name. 78.190.25.41 (talk) 15:34, 17 July 2020 (UTC)[reply]