Unicode characters in mathed

[Kornel Benko]

Am Thu, 6 Apr 2023 10:43:42 +0200
schrieb Jean-Marc Lasgouttes <lasgouttes at lyx.org>:

> Le 03/04/2023 à 00:36, Enrico Forestieri a écrit :
> >> So how should I solve problem 1/ ? I see 3 solutions
> >> a/ replace ≠ with a \neq directly in the document at input time; we 
> >> might not want to do that in case we eventually use unicode in math too
> >> b/ replace ≠ with a \neq on screen only
> >> c/ keep the ≠ on screen, but use the mathrel math class from \neq so 
> >> that we have a good spacing  
> > 
> > I would say (a) but only for symbols that are actually translated in 
> > output.  
> 
> What I wonder is whether keeping the unicode characters in the document 
> could be helpful (for html/docbook export, for example) and avoid 
> overrriding users actions. I think I will try b/ first, until I have 
> other people (Günther, do you read this?) tell me that I can get rid of 
> unicode keys early.
> 
> Also, things like ² are translated to more complex commands like {}^2, I 
> am not sure that I want to insert it with an editable nucleus.
> 
> >> Then, I see that there are two ways of matching \neq to U+2260:
> >> i/ lib/unicodesymbol has a "mathcommand" entry for that (which is 
> >> presumably used right now)
> >> ii/ lib/symbols also links these elements
> >>
> >> Which one is more reliable for what I want to do?  
> > 
> > As I see it, (i) is for export and (ii) is for screen representation, so 
> > I would suggest using (i).  
> 
> Right.
> 
> >> My general problem is that, while I see what happens with \neq, I 
> >> suspect that many weird things can happen with other characters.
> >>
> >> Any advice?  
> > 
> > Be careful ;)  
> 
> Indeed. This is probably not 2.4 material anyway, unless it turns out to 
> be very easy to implement.
> 
> JMarc
> 

Would be nice to have a list of these math-commands which can map to unicode. (Not all
are in file unicodesymbols). This is important for advanced find too.

	Kornel
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