Same commands for different unicodes?

[Thibaut Cuvelier]

On Sun, 20 Feb 2022 at 13:12, Kornel Benko <kornel at lyx.org> wrote:

> In unicodesymbols we find
>
> 0x025b "\\textepsilon"            "tipa" ...
> 0x03b5 "\\textepsilon"      "textgreek" ...
>

0x03b5 is a true epsilon (https://unicodemap.org/details/0x03B5/index.html),
i.e. a letter in the Greek alphabet, while 0x025b is only something that
looks like an epsilon (https://unicodemap.org/details/0x025b/index.html),
an IPA symbol. For the latter (0x025b), it's rather an "open-mid front
unrounded vowel" (according to
https://upload.wikimedia.org/wikipedia/commons/8/8f/IPA_chart_2020.svg).
Although the TIPA package is using \textepsilon to enter this character (
https://mirror.lyrahosting.com/CTAN/fonts/tipa/tipaman.pdf, page 33), so
I'm not sure there's anything to correct.


> 0x204e "\\textasteriskcentered"   "textcomp" ...
> 0x*2217* "\\textasteriskcentered"   "textcomp" ...
>

According to Wikipedia (https://en.wikipedia.org/wiki/Asterisk), 0x204e is
a "low asterisk" and 0x2217 is the "asterisk operator". It looks like
\textasteriskcentered should output a 0x2217 (based my understanding of
http://hevea.inria.fr/examples/test/sym.html) and \textasterisklow a 0x204e
(https://www.johndcook.com/unicode_latex.html: it's recognised by MathGL
http://mathgl.sourceforge.net/docs_v1/mathgl_en_10.html and STIX
http://www.ams.org/STIX/bnb/stix-tbl-2006-10-18.asc). I'd say this is a
mistake in unicodesymbols.

For the math mode, these two symbols are found as \ast, I have no idea
about the semantic difference with the character * (0x002a): probably more
the operator, because it's usually used as times for calculators…
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