Hans Hagen wrote:
>>+-----------------------------------------------------+
>>| |
>>| ,- |
>>| | 15, if something (1) |
>>| x = { |
>>| | 0, otherwise (2) |
>>| `- |
>>+-----------------------------------------------------+
The basic TeX structure for this would be an full-width \eqalignno,
like so:
\def\fixeqline{\noalign{\kern-.4\baselineskip}}
\def\guessedstrut{\vrule height 12pt depth 12pt width0pt}
$$\eqalignno{
& 15, \hbox{ if something} & (1)\cr \fixeqline
x=\smash{\left\{\guessedstrut\right .}
& & \cr \fixeqline
& 0, \hbox{ otherwise} & (2)\cr} $$
Not very nice, but TeX (the engine) does not allow a cleaner
solution. I guess it is possible to wrap this up in a nicer
looking macro, but it requires some trial typesetting for the
magical quantities used in the two macros.
Cheers, Taco
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