[NTG-context] Aligning sub- and superscripts

[Florent Michel <florent.m42@gmail.com>]

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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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