[NTG-context] Aligning sub- and superscripts

[NTG-context] Aligning sub- and superscripts

[Florent Michel]

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Hi,

I was going through the ‘Mathematics/Mathematical glyphs’ section of the
wiki. Unless I am missing something, the first method proposed in the
section ‘Subscript and superscript’ (
https://wiki.contextgarden.net/Mathematics/Mathematical_glyphs#Subscript_and_superscript)
to align sub- and superscripts does not seem to align them with ConTeXt
2025.04.01. The following example:

\starttext
  $T^a_b^c$
  $T^a{}_b{}^c{}$
\stoptext

produces (unless my eyes are deceiving me) twice the same output, with the
subscript b below a.

One possible workaround is to add 0-width spaces after indices (I just
added this workaround to the wiki so that it shows one working option).
This seems a bit of a hack, though (and not the easiest to type with most
keyboards), and the results are not perfect (the space between the a and c
looks a bit too wide to me; although that is probably subjective, and can
be resolved by manually adding \kern s).

Would anyone know if there is a better (easier to type and/or producing a
better result without having to manually add negative \kern s) solution?

Cheers,
Florent

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[NTG-context] Re: Aligning sub- and superscripts

[Mikael Sundqvist]

Hi!

Assuming you are using context lmtx, does section 2.7 in
https://www.pragma-ade.com/general/manuals/mathincontext-screen.pdf
help you?

/Mikael

On Thu, Apr 24, 2025 at 11:29 AM Florent Michel <florent.m42@gmail.com> wrote:
>
> Hi,
>
> I was going through the ‘Mathematics/Mathematical glyphs’ section of the wiki. Unless I am missing something, the first method proposed in the section ‘Subscript and superscript’ (https://wiki.contextgarden.net/Mathematics/Mathematical_glyphs#Subscript_and_superscript) to align sub- and superscripts does not seem to align them with ConTeXt 2025.04.01. The following example:
>
> \starttext
>   $T^a_b^c$
>   $T^a{}_b{}^c{}$
> \stoptext
>
> produces (unless my eyes are deceiving me) twice the same output, with the subscript b below a.
>
> One possible workaround is to add 0-width spaces after indices (I just added this workaround to the wiki so that it shows one working option). This seems a bit of a hack, though (and not the easiest to type with most keyboards), and the results are not perfect (the space between the a and c looks a bit too wide to me; although that is probably subjective, and can be resolved by manually adding \kern s).
>
> Would anyone know if there is a better (easier to type and/or producing a better result without having to manually add negative \kern s) solution?
>
> Cheers,
> Florent
> ___________________________________________________________________________________
> If your question is of interest to others as well, please add an entry to the Wiki!
>
> maillist : ntg-context@ntg.nl / https://mailman.ntg.nl/mailman3/lists/ntg-context.ntg.nl
> webpage  : https://www.pragma-ade.nl / https://context.aanhet.net (mirror)
> archive  : https://github.com/contextgarden/context
> wiki     : https://wiki.contextgarden.net
> ___________________________________________________________________________________
___________________________________________________________________________________
If your question is of interest to others as well, please add an entry to the Wiki!

maillist : ntg-context@ntg.nl / https://mailman.ntg.nl/mailman3/lists/ntg-context.ntg.nl
webpage  : https://www.pragma-ade.nl / https://context.aanhet.net (mirror)
archive  : https://github.com/contextgarden/context
wiki     : https://wiki.contextgarden.net
___________________________________________________________________________________

[NTG-context] Re: Aligning sub- and superscripts

[Florent Michel]

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Hi Mikael,

Thanks a lot! It's indeed exactly what I was looking for!
I'll replace my hack-y solution with a link to that section in the wiki.

Cheers,
Florent

Le jeu. 24 avr. 2025 à 10:36, Mikael Sundqvist <mickep@gmail.com> a écrit :

> Hi!
>
> Assuming you are using context lmtx, does section 2.7 in
> https://www.pragma-ade.com/general/manuals/mathincontext-screen.pdf
> help you?
>
> /Mikael
>
> On Thu, Apr 24, 2025 at 11:29 AM Florent Michel <florent.m42@gmail.com>
> wrote:
> >
> > Hi,
> >
> > I was going through the ‘Mathematics/Mathematical glyphs’ section of the
> wiki. Unless I am missing something, the first method proposed in the
> section ‘Subscript and superscript’ (
> https://wiki.contextgarden.net/Mathematics/Mathematical_glyphs#Subscript_and_superscript)
> to align sub- and superscripts does not seem to align them with ConTeXt
> 2025.04.01. The following example:
> >
> > \starttext
> >   $T^a_b^c$
> >   $T^a{}_b{}^c{}$
> > \stoptext
> >
> > produces (unless my eyes are deceiving me) twice the same output, with
> the subscript b below a.
> >
> > One possible workaround is to add 0-width spaces after indices (I just
> added this workaround to the wiki so that it shows one working option).
> This seems a bit of a hack, though (and not the easiest to type with most
> keyboards), and the results are not perfect (the space between the a and c
> looks a bit too wide to me; although that is probably subjective, and can
> be resolved by manually adding \kern s).
> >
> > Would anyone know if there is a better (easier to type and/or producing
> a better result without having to manually add negative \kern s) solution?
> >
> > Cheers,
> > Florent
> >
> ___________________________________________________________________________________
> > If your question is of interest to others as well, please add an entry
> to the Wiki!
> >
> > maillist : ntg-context@ntg.nl /
> https://mailman.ntg.nl/mailman3/lists/ntg-context.ntg.nl
> > webpage  : https://www.pragma-ade.nl / https://context.aanhet.net
> (mirror)
> > archive  : https://github.com/contextgarden/context
> > wiki     : https://wiki.contextgarden.net
> >
> ___________________________________________________________________________________
>
> ___________________________________________________________________________________
> If your question is of interest to others as well, please add an entry to
> the Wiki!
>
> maillist : ntg-context@ntg.nl /
> https://mailman.ntg.nl/mailman3/lists/ntg-context.ntg.nl
> webpage  : https://www.pragma-ade.nl / https://context.aanhet.net (mirror)
> archive  : https://github.com/contextgarden/context
> wiki     : https://wiki.contextgarden.net
>
> ___________________________________________________________________________________
>

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___________________________________________________________________________________
If your question is of interest to others as well, please add an entry to the Wiki!

maillist : ntg-context@ntg.nl / https://mailman.ntg.nl/mailman3/lists/ntg-context.ntg.nl
webpage  : https://www.pragma-ade.nl / https://context.aanhet.net (mirror)
archive  : https://github.com/contextgarden/context
wiki     : https://wiki.contextgarden.net
___________________________________________________________________________________

[NTG-context] Re: Aligning sub- and superscripts

[Hans Hagen]

On 4/24/2025 11:27 AM, Florent Michel wrote:

> \starttext
>    $T^a_b^c$
>    $T^a{}_b{}^c{}$
> \stoptext
> 
> produces (unless my eyes are deceiving me) twice the same output, with 
> the subscript b below a.

fwiw: {} in context in math does not create an atom, it is just grouping 
so here it does nothing; we have a different mechanism for handling 
multiple successive scripts (plus control over spacing)

see mikaels answer

Hans

-----------------------------------------------------------------
                                           Hans Hagen | PRAGMA ADE
               Ridderstraat 27 | 8061 GH Hasselt | The Netherlands
        tel: 038 477 53 69 | www.pragma-ade.nl | www.pragma-pod.nl
-----------------------------------------------------------------
___________________________________________________________________________________
If your question is of interest to others as well, please add an entry to the Wiki!

maillist : ntg-context@ntg.nl / https://mailman.ntg.nl/mailman3/lists/ntg-context.ntg.nl
webpage  : https://www.pragma-ade.nl / https://context.aanhet.net (mirror)
archive  : https://github.com/contextgarden/context
wiki     : https://wiki.contextgarden.net
___________________________________________________________________________________

[NTG-context] Re: Aligning sub- and superscripts

[Florent Michel]

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Thanks a lot Hans for the explanation!

Cheers,
Florent

Le jeu. 24 avr. 2025 à 10:53, Hans Hagen <j.hagen@xs4all.nl> a écrit :

> On 4/24/2025 11:27 AM, Florent Michel wrote:
>
> > \starttext
> >    $T^a_b^c$
> >    $T^a{}_b{}^c{}$
> > \stoptext
> >
> > produces (unless my eyes are deceiving me) twice the same output, with
> > the subscript b below a.
>
> fwiw: {} in context in math does not create an atom, it is just grouping
> so here it does nothing; we have a different mechanism for handling
> multiple successive scripts (plus control over spacing)
>
> see mikaels answer
>
> Hans
>
> -----------------------------------------------------------------
>                                            Hans Hagen | PRAGMA ADE
>                Ridderstraat 27 | 8061 GH Hasselt | The Netherlands
>         tel: 038 477 53 69 | www.pragma-ade.nl | www.pragma-pod.nl
> -----------------------------------------------------------------
>
> ___________________________________________________________________________________
> If your question is of interest to others as well, please add an entry to
> the Wiki!
>
> maillist : ntg-context@ntg.nl /
> https://mailman.ntg.nl/mailman3/lists/ntg-context.ntg.nl
> webpage  : https://www.pragma-ade.nl / https://context.aanhet.net (mirror)
> archive  : https://github.com/contextgarden/context
> wiki     : https://wiki.contextgarden.net
>
> ___________________________________________________________________________________
>

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___________________________________________________________________________________
If your question is of interest to others as well, please add an entry to the Wiki!

maillist : ntg-context@ntg.nl / https://mailman.ntg.nl/mailman3/lists/ntg-context.ntg.nl
webpage  : https://www.pragma-ade.nl / https://context.aanhet.net (mirror)
archive  : https://github.com/contextgarden/context
wiki     : https://wiki.contextgarden.net
___________________________________________________________________________________