# Talk:4

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## rm "pointless book"

i removed

Four also give rise to arguably the most pointless book in the history of publishing, Norman L. De Forest's The Square Root of 4 to a Million Places. [1]

cause I thought it was a pov (though one I agree with). I looked at the book in question, available for download. i can give you a good idea of its contents: after the legalese, it tells you the square root of 4, which is 2.000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000 and so on. Numerao 19:48, 30 Aug 2004 (UTC)

## Claim of "base number"

I removed the following:

A circle divided by 4 makes right angles and four quadrants. Because of it, four is the base number of the plane (mathematics).

The first part is not notable, since dividing a circle into n equal parts always makes(?) n sectors, and it is just that "quadrant" is a special word for a 90° sector. The bit about "base number" is unclear, and unsourced. Imaginatorium (talk) 09:54, 17 March 2021 (UTC)

## Knuth's notation does not work this way

"Continuing the pattern in Knuth's up-arrow notation, 2 ↑↑ 2 = 2 ↑↑↑ 2 = 4, and so on, for any number of up arrows.[3]"

It's not very polite to put falsehoods in pages about numbers :( — Preceding unsigned comment added by Ilari sahamies (talkcontribs) 13:20, 29 March 2021 (UTC)

}} 182.19.172.39 (talk) 08:19, 25 October 2021 (UTC) 4 is a common number that China hate, which represents die in China 'cause die in Chinese is si which is a very similar sound to 4, so be careful if you are there! The worse: Japan doesn't eat with 4 people, doesn't buy 4 things, doesn't eat in the forth floor etc with 4 24 can become nishi, aka double death (nishi ニ死にし) 42 (the answer to life, the universe, and everything!) can become shini, aka "death" or "to death" (shini 死しに) 43 can become shisan which sounds like shizan, aka stillbirth (shinzan 死産しさん) 45 can be shigo, or "after death" (shinzan 死後しご) 49 (though a bit of a stretch) can become shinu made kurushimu, aka "To suffer until death."

## "−4" listed at Redirects for discussion

A discussion is taking place to address the redirect −4. The discussion will occur at Wikipedia:Redirects for discussion/Log/2021 October 31#−4 until a consensus is reached, and readers of this page are welcome to contribute to the discussion. ~~~~
13:36, 31 October 2021 (UTC)

## Seven Segment Display

I’d request that the edit I made in October be re-instated now that the bug has presumably been patched A. Rosenberg (talk) 19:39, 23 November 2021 (UTC)

## "Open four"

The article suggests that the "open four" (below) is a product of calculators/televisions only. Is this really the case? I always thought of this as a fairly common alternative way of writing "4". McPhail (talk) 14:16, 16 May 2022 (UTC)

## "꤄" listed at Redirects for discussion

An editor has identified a potential problem with the redirect and has thus listed it for discussion. This discussion will occur at Wikipedia:Redirects for discussion/Log/2022 July 4#꤄ until a consensus is reached, and readers of this page are welcome to contribute to the discussion. 1234qwer1234qwer4 22:58, 4 July 2022 (UTC)

## The tomb of Jesus Ibn Maryam

https://en.m.wikipedia.org/wiki/Tomb_of_Jesus The four tombs in the Green Dome: Muhammad, Abu Bakr, Umar ibn Khattab and Isa ibn Maryam (Jesus) 197SHivan~ (talk) 10:05, 22 July 2022 (UTC)