<--- On Jan 28, Taco Hoekwater wrote --->
> Aditya Mahajan wrote:
>>> The definition from m-newmat is at least partly superceded by the
>>> new core math definitions Hans added last week, so a new implementation
>>> would be better.
>>
>> Can you suggest something?
>
> Like this maybe?
>
> \def\substack#1%
> {\begingroup
> \let\\\cr
> \startmathmatrix #1\stopmathmatrix
> \endgroup}
>
> Probably needs a bit of tweaking to make it look better
> (perhaps a [strut=no] parameter?).
>
<--- On Jan 28, Vit Zyka wrote --->
> What about use math primitive \atop:
>
> \def\substack#1%
> {\begingroup
> \let\\\atop
> #1
> \endgroup}
>
Sorry for not getting back for almost a month. Both suggestions work
only partially. Consider
\startmathformula
\sum_{%
\startmathmatrix
i = 1 \NR i \neq n \NR i \neq m
\stopmathmatrix
}a_i
\stopformula
As Taco mentioned, the spacing is bad.
\atop gives correct spacing but you need to put subscripts in groups
of two.
\startformula
\sum_{ {i = 1 \atop i \neq n}\atop i \neq m } a_i
\stopformula
Moreover, the font size is incorrect in both cases. Compare with the
size of the subscript in \sum_{i = 1}.
Any suggestions?
Aditya
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