<div dir="ltr">Mathematical typesetting and proper musical notation are not in the scope of Unicode. (Just another reason I'm making my own character set.)<br></div><br><div class="gmail_quote"><div dir="ltr" class="gmail_attr">On Thu, Mar 23, 2023 at 11:43 AM Giacomo Catenazzi via Unicode <<a href="mailto:unicode@corp.unicode.org">unicode@corp.unicode.org</a>> wrote:<br></div><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left-width:1px;border-left-style:solid;border-left-color:rgb(204,204,204);padding-left:1ex"><br>
On 23 Mar 2023 15:55, Marius Spix via Unicode wrote:<br>
> In TeX and MathML, U+005E CIRCUMFLEX ACCENT ^ is used for superscript <br>
> and U+005F LOW LINE _ for subscript. This also allows power towers like <br>
> 2^(2^2), which are not possible with the existing Unicode characters. <br>
> This notation is recognized by mathmaticians, physicists and chemists <br>
> and widely accepted.<br>
<br>
> In some programming languages, e. g. Java or C++, ^ is used for the XOR <br>
> operation and _ for digit grouping, but that does not matter here, <br>
> because the context is always the decisive factor.<br>
<br>
> Many modern fonts have support for auto-alignment of digits in <br>
> combination with U+2044 FRACTION SLASH ⁄ like in that example: 13⁄37. So <br>
> it may be possible to design a font with special handling for ^ and _.<br>
<br>
Let's be honest: most people which are asking for superscript letters <br>
are not interested in display in mathematics.<br>
<br>
In any case /FRACTION SLASH/ can display some fractions, not all fonts <br>
have good support for it (e.g. on your mail I see it nice, but in the <br>
quoted text above I see it very ugly. But such formatting not only <br>
depends on font, but also on user preferences (and settings). Like <br>
tabular numbers (also often included in fonts), it may not be enabled by <br>
default, or it should be explicitly enabled e.g. on tables). Unicode do <br>
not support such presentation settings. So a FRACTION SLASH is just a <br>
solution for one specific case. Note: there is no delimiter, so usually <br>
fonts support it only for numbers, and maybe with limited number of <br>
digits. Maths is more then nubers. An other reasons to have maths in <br>
markup language.<br>
<br>
Also it is very annoying to type Unicode symbols not on the restricted <br>
number of keys in normal keyboards. We learn it also from computer <br>
languages. On earliest days computers languages had many symbols because <br>
every operations "needed" own symbols. Guess what? Now every modern <br>
computer languages uses practically only ASCII characters. <br>
Practicability is better then a ideal system few people uses.<br>
<br>
In any case, to display true maths, we need a specialised engine (and <br>
fonts). We are far from having current shaping engines (and fonts) to <br>
display maths in a nice way. (and personally I prefer that developers of <br>
shaping engines will works on improving the actual engine and fonts for <br>
human languages, before to go on such specialised field (which we have <br>
already good tools).<br>
<br>
Superscript letters can be done with current fonts and current shaping <br>
engines and many markup languages, so any discussion (and new <br>
characters) are distractions which do not direct us on a true Unicode <br>
mathematical typesetting (not a goal, like musical notation). And it <br>
will make things worst: searching engines must have to interpret <br>
everything. Speech synthesis will become much more complex (and it <br>
should understand where it is maths, chemistry or units: you will need <br>
to spell them differently. And probably many other unforeseen problems.<br>
<br>
ciao<br>
cate<br>
</blockquote></div>