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U+237C ⍼ Right Angle with Downwards Zigzag Arrow

ionathan.ch

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Re: U+237C ⍼ Right Angle with Downwards Zigzag Arrow

#171

Post by contravariant »

zeteo wrote: post #138
firstcommentyo wrote: post #98

Dislosure: I'm not directly from the fields of the Sciences Of Angles And Ambiguously Crossing Lines nor I've every seen or used this symbol before. However to me it's, pretty evidently, supposed to be a "no right angle" symbol. (A) It's in the math section, (B) it's with angles, (C) the thunderbolt ↯ is commonly used for "not" or more specifically for dis-proof in this area and (D) at least by my 30 s internet searc…

> (C) the thunderbolt ↯ is commonly used for "not" or more specifically for dis-proof in this area Any examples?

I've seen it used for contradiction. Though that's not the same thing as 'not' and I can't think of why you'd combine this with orthogonality.

Re: U+237C ⍼ Right Angle with Downwards Zigzag Arrow

#172

Post by hedora »

zeteo wrote: post #138
firstcommentyo wrote: post #98

Dislosure: I'm not directly from the fields of the Sciences Of Angles And Ambiguously Crossing Lines nor I've every seen or used this symbol before. However to me it's, pretty evidently, supposed to be a "no right angle" symbol. (A) It's in the math section, (B) it's with angles, (C) the thunderbolt ↯ is commonly used for "not" or more specifically for dis-proof in this area and (D) at least by my 30 s internet searc…

> (C) the thunderbolt ↯ is commonly used for "not" or more specifically for dis-proof in this area Any examples?

If the thunderbolt means not, and the right angle is displaying the x and y axis, then this symbol could be a pun for "not a function".

Re: U+237C ⍼ Right Angle with Downwards Zigzag Arrow

#173

Post by reaperducer »

no one knows what ⍼ is meant to represent

Translation: Nothing came up on a Google search, and going to the library and looking in a book is hard.

I see this more and more often these days. Bloggers claiming that there is no known origin for something, or inventing their own histories based on nothing more than internet searches.

The internet is vast, but 99.9% of the world's history and information is not online for free.

Re: U+237C ⍼ Right Angle with Downwards Zigzag Arrow

#174

Post by mkl »

account42 wrote: post #144
vesinisa wrote: post #35

Earlier quoted context omitted.

Should we also have slanted, bold, semi-bold, light and underlined versions of every code point? Versions with/without serifs? For monospaced text? Those are all presentational matters. That we have super/subscripts in Unicode in the first place seems to have been just a hack to help terminal emulator software deal with obsolete encodings like ISO-8859-1: https://www.unicode.org/L2/L2000/00159-ucsterminal.txt

𝐒𝐡𝐨𝐮𝐥𝐝 𝘄𝗲 𝗵𝗮𝘃𝗲 𝗯𝗼𝗹𝗱 𝙖𝙣𝙙/𝘰𝘳 𝑠𝑙𝑎𝑛𝑡𝑒𝑑 𝒄𝒉𝒂𝒓𝒂𝒄𝒕𝒆𝒓𝒔 𝗶𝗻 𝗨𝗻𝗶𝗰𝗼𝗱𝗲? 𝓘𝓽 𝓼𝓮𝓮𝓶𝓼 𝓈𝑜𝓂𝑒𝑜𝓃𝑒 𝔱𝔥𝔬𝔲𝔤𝔥𝔱 𝖘𝖔!

Those are intended for maths, not for formatted text. Variables in mathematics are usually a single character, so there is a great variety of ways to format the characters to create different symbols. Diacritical marks, underlines, etc. are also used for this.

Re: U+237C ⍼ Right Angle with Downwards Zigzag Arrow

#176

Post by robonerd »

db48x wrote: post #135
samatman wrote: post #99

Earlier quoted context omitted.

The word "public" in "public library" is load bearing, you can't replace it with "regular", hence your confusion. Private libraries (mine for example) are not free, as in beer or otherwise.

True, though to be fair most people never get to use private libraries. Or they used a library at their University that was technically private, but that gave access to the public as well. Public libraries are ubiquitous and very normal, while private libraries are the exception.

In America, public schools all have private libraries, reserved for attending students. (Maybe some operate as public libraries, but I've never seen nor heard of it.)

Furthermore, public libraries are not necessarily free. In America they virtually are all; fees only for late returns. But this is not globally true; in some parts of the world, libraries open to the public charge a fee for checking out books, or even require a fee for entry.

Re: U+237C ⍼ Right Angle with Downwards Zigzag Arrow

#177

Post by lifthrasiir »

thaumasiotes wrote: post #114
lifthrasiir wrote: post #45

Earlier quoted context omitted.

Unicode defines characters, their semantics and (very flexible) guidelines for rendering them. Unlike, say, bold, italic or super/subscripts, bidirectionality is an intrinsic property of those characters and can't be easily refactored.

> Unicode defines characters, their semantics Unicode specifically states that it doesn't define the semantics of characters. That would seriously interfere with its purpose of defining characters. There are some notable exceptions, and they are acknowledged to be mistakes.

> Unicode specifically states that it doesn't define the semantics of characters.

The Unicode Standard explicitly says otherwise:

> Characters have well-defined semantics. These semantics are defined by explicitly assigned character properties, rather than implied through the character name or the position of a character in the code tables (see Section 3.5, Properties). [1]

> The Unicode Standard associates a rich set of semantics with characters and, in some instances, with code points. The support of character semantics is required for conformance; see Section 3.2, Conformance Requirements. [2]

To be fair, it refers to "character" semantics which is more or less abstracted by character properties. It is not like that, for example, △ U+25B2 WHITE UP-POINTING TRIANGLE UNICODE CHARACTER can only ever be used for denoting triangles. But it has defined semantics in the way that the character has properties expected for such symbols.

[1] https://www.unicode.org/versions/Unicode14.0.0/ch02.pdf#page...

[2] https://www.unicode.org/versions/Unicode14.0.0/ch04.pdf#page...

Re: U+237C ⍼ Right Angle with Downwards Zigzag Arrow

#178

Post by chasd00 »

jorvi wrote: post #55
vletal wrote: post #42

Earlier quoted context omitted.

I do not get it. Did you have to shut it down? Does not make sense to complain that someone uploaded stuff to a public unprotected writable storage. Wouldn't securing it with a set of credentials suffice?

Sometimes people should be able to do nice things without it getting abused, no? In The Netherlands, in the nicer neighborhoods we have something called a ‘buurtbieb’ aka a ‘neighborhood libraries’, which is a weatherproof cabinet where people can put surplus books that other people in the neighborhood can borrow. Of course you could take all the books or use the cabinet to store candy, but why would you?

there's one down the street from me but instead of books it has canned food. It says "little free pantry" on it. It must have been around for a while because the neighborhood it's in has long sense been gentrified and is populated with very well-off residents vs the working poor that use to live there.

Re: U+237C ⍼ Right Angle with Downwards Zigzag Arrow

#179

Post by hedora »

notreallyserio wrote: post #142
phyzome wrote: post #89

Earlier quoted context omitted.

Usually called Little Free Libraries in the US. (The name is a little weird, because regular libraries are also free...)

FWIW "Little Free Library" is a trademark and its owners have been aggressive in its defense. I don't know what folks should use as a generic name.

Just keep using it as a generic name. They've already lost the generification war. Are they seriously going to track down and sue neighborhood libraries?

Good luck getting a jury to enforce the trademark.

Re: U+237C ⍼ Right Angle with Downwards Zigzag Arrow

#180

Post by kevin_thibedeau »

mkl wrote: post #34
knome wrote: post #22

Earlier quoted context omitted.

1) there's only ~150k unicode values defined. If we assume a signed int for available space, we have 2,147,333,647 of 2,147,483,647 remaining. moreso if the int is unsigned. We're fine. 2) they use values that combine like ligatures to create the variants of values. there isn't a combinatorial explosion because color is a modifier value, and sex, and then the underlying symbol. It's not a unique symbol for each combi…

We can't assume a signed int, as character encodings limit the number of codepoints: "Excluding surrogates and noncharacters leaves 1,111,998 code points available for use." -- https://en.wikipedia.org/wiki/Unicode#:~:text=Excluding%20su...

Unicode has been limited to 21-bits for a while so that UTF8 is guaranteed to encode no more than four bytes per code point. It can support the full 32-bit code space but changing now will break a lot of validation code.
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