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From: Christopher Creutzig <christopher@creutzig.de>
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Subject: m-newmat
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Xref: main.gmane.org gmane.comp.tex.context:13121

Hello everyone,

  I have three comments wrt m-newmat.tex, version 2000.11.16:

I had to change a \startypen into \starttypen to get a typeset version.

At the end of the file, Hans was looking for applications of subarrays:

$$\sum_{\startsubarray[c]
       1\leq i \leq 10\crcr
       1\leq j \leq i
       \stopsubarray} i^j = 11567154195$$

(Actually, I think \\ should work in place of \crcr, too.)  The
definition of substack looks broken to me: first of all, there is no
\simplestartsubstack and secondly the command should not be named
\start... since there is no corresponding \stop... command.  Suggested code:

\def\substack
   {\startsubarray[c]#1\stopsubarray}

(Since the argument will be typeset anyway, I think it should be given
in {}, right?)  Usage:

$$\sum_{\substack{1\leq i \leq 10\crcr
                   1\leq j \leq i} i^j = 11567154195$$


regards,
	Christopher Creutzig