Talk:2606: Weird Unicode Math Symbols

Explain xkcd: It's 'cause you're dumb.
Revision as of 08:33, 14 April 2022 by 172.69.79.223 (talk)
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Apparently, nobody knows what U+237C ⍼ means (https://ionathan.ch/2022/04/09/angzarr.html)

For me it looks very like as designation of where electrical cable is burrowed. It should come with numbers near angle hands designating depth and offset from sign. But it just a guess, of course 141.101.76.221 05:30, 14 April 2022 (UTC)


Can someone add a column where we try to crowdsource a description for the "mathematical use of symbol" ?

I'm curious what those symbols actually mean, and the unicode titles don't give that much information.

I do not doubt that have enough math geeks on here to find the answer to most of then :-D

Thanks! Flekkie (talk) 01:20, 14 April 2022 (UTC)

i agree w Flekkie's comment Blue in real life (talk) 02:27, 14 April 2022 (UTC)


If you make edits, please don't immediately delete all of mine because you think yours are better. It shows you conflicting edits for a reason. Some explanations are nonsensical, like defining a smash product as the "result of dividing two product spaces." The smash product is specifically the quotient of the underlying spaces of two pointed spaces where points in the product spaces are identified if they contain either labeled point as an element. Other claims are simply mistaken. For instance, the ≝ symbol is used to introduce a definition, not to declare that the definition has been achieved in a proof. The claim that "A union on smash product appears to be one where the sets are nit isomorphic" is totally meaningless. The symbol ⩩ is not merely decorative but is intended as a supplemental math symbol like all the others. I couldn't track down its purpose. The APL symbol description somehow never bothers to mention APL. This is all very cursory, which is fine, but just please don't delete my work while doing it. 172.70.130.5 04:15, 14 April 2022 (UTC)

I'm done, page is yours. I'd been working on it for an hour and every time I tried to save, a new edit came in. I did my best to reconcile them but by the fifth I just saved a copy of what was there and pasted mine over. I immediately got to work on recovering what I had pasted over as indicated in the edit comment and like I said, I'm done. I've merged to the best of my ability and have no more interest in this page.
--FrankHightower (talk) 04:37, 14 April 2022 (UTC)
I'm very sorry if I was one of those who stepped on your edits. I was originally trying to fix brokenness in the table.
^^^^^^ is the symbol for preferring many small edits over not saving your work often in a batch-mode collaborative editing environment. 172.70.207.8 04:55, 14 April 2022 (UTC)
Don't worry about it, idk why I was so upset. It's that feeling you get when you click "save" and then suddenly it's gone. If anything's still missing, I'll just restore it. 172.70.131.106 05:41, 14 April 2022 (UTC)

I wish we had as much research on ⧍ and ⩩ as we have for ⍼. 172.70.207.8 05:16, 14 April 2022 (UTC)

No clue what those are for. The first is a triangle with serifs? The triangle symbol (not capital delta) is often used in geometry to represent a triangle, but why in the world would you give a geometric figure serifs? I think I may have seen the triple cross-hatch somewhere, but I couldn't say where. Maybe it's the chess commentary symbol for being mated so badly it's embarrassing. 172.70.131.106 05:41, 14 April 2022 (UTC)
I'm guessing what must have happened is the code page in question was filled in by a typographer with more graphic design than mathematical experience, who likely added made-up "missing" symbols as the design-logical extensions of the symbols they were given, presumably to be on the safe side in case they had what appeared to be a possibly incomplete set. There are some awesome ones in there, like "⩐" TEST-TUBE PARTHENOGENISIS, and "⨻" THE ILLUMINATI IS DEAD. 162.158.255.171 06:07, 14 April 2022 (UTC)
The ⧍ character has the same origin as ⍼, namely that they were both part of ISO/IEC TR 9573-13 with no explanation given. You can find it in some old charts online, like here: [1], under `trisb`/codepoint E27E. ionchy (talk) 07:03, 14 April 2022 (UTC)
I am sure that I have seen maps with such a symbol used for campsites, and without the bold strokes of the top sides as the National Park Service draws it. I haven't found any yet, but I have found one without the center base -- like _/\_ -- on a 1960s era map. 172.69.134.131 07:07, 14 April 2022 (UTC)
As for ⩩, the character just before it in the Unicode code chart [2], ⩨, has the text "identical and parallel to", so it's possible the horizontal lines in this one also means "identical to". I don't know what three vertical lines mean though, and in Unicode there's three (!) different characters with similar glyphs: U+2980 ⦀, U+2AF4 ⫴, and U+2AFC ⫼. ionchy (talk) 07:28, 14 April 2022 (UTC)
Identical both vertically and horizontally? 172.69.134.131 07:32, 14 April 2022 (UTC)
I found one suggestion that the dodecathorp should be used to refer to very big numbers...172.69.79.223 08:33, 14 April 2022 (UTC)