# [NTG-context] intertext for aligned equations

Hans Hagen pragma at wxs.nl
Mon Mar 27 14:27:41 CEST 2006

Taco Hoekwater wrote:
> Hi,
>
>
>
>> This seems to be working fine. However, \intertext defined in
>> amsmath.sty seems to be doing  a lot more (I just can't figure out
>> what it is doing?) Can someone suggest how to make the above command
>> more robust on the lines of \intertext?
>>
>
> It inserts a post/pre-display skip&penalty pair around the intertext,
> then creates a \vbox for use a paragraph. The result is (almost) as if
> it the text was part of the 'normal' text flow between two displays.
>
> I cannot tell you if this would work exactly the same as expected in
> ConTeXt (needs further testing), but a context-like solution would
> look like this:
>
> \def\startintertext#1\stopintertext{%
>    \noalign{\dointertext{#1}}\NR}
>
> \unexpanded\def\dointertext#1%
>     {\penalty\postdisplaypenalty
>      \afterdisplayspace  % the matching \before... is not needed
>      \vbox{\forgetall \noindent #1\par}%
>      \penalty\postdisplaypenalty }
>
can someone wrap up the accumulated patches/suggestions for the math environments?

Hans

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