[NTG-context] Multiline text in mathmode

[Hans Hagen]

On 6/30/2022 7:13 AM, Aditya Mahajan via ntg-context wrote:
> On Thu, 30 Jun 2022, Johann Birnick via ntg-context wrote:
> 
>> I guess you will update to LMTX..? Unfortunately I use MkIV, because of other
>> math bugs in LMTX. Do you know any (can be ugly) way of doing this without the
>> new stuff?
> 
> You could just use a framed.
> 
> \define[1]\multilinetext{\vcenter{\framed[align=middle,frame=off]{#1}}}
> 
> \startTEXpage[offset=2mm]
>    \startformula
>      \left\{ \multilinetext{Quaternion algebra over $\rationals$ \\ up to
>      isomorphisms} \right\}
>    \stopformula
> \stopTEXpage
indeed, the lmtx definiton sis similar:

\permanent\tolerant\protected\def\mparagraph[#1]#*#:#2%
   {\vcenter class \mathconstructcode \bgroup
      \framed
        [\c!offset=\v!overlay,
         \c!frame=\v!overlay,
         \c!align=\v!middle,
         #1]{#2}%
    \egroup}

Hans

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