On Sat, 10 Jan 2009, Marcin Borkowski wrote:
Dnia Sat, Jan 10, 2009 at 01:15:28PM -0500, Aditya Mahajan napisał(a):
On Sat, 10 Jan 2009, Marcin Borkowski wrote:
Hi all,
I'd like to typeset a system of simultaneous equations. I want it to
have a brace on the left (like "cases"), but inside I want it to have
two columns aligned like "align". Also, I'd like to have the vertical
space between the equations be small (like in cases), not so big as in
align.
How to do this?
I do not completely understand what you want. Do the following give the
desired output.
Sorry;).
\starttext
\startformula
\startcases[align={right,left},distance=3pt]
\NC 2x + 3y \MC{} = 10 \NR
\NC 3x + 2y \MC{} = 5 \NR
\stopcases
\stopformula
\startformula
\startmatrix[align={right,left},distance=3pt,left={\left\{},
right={\right.}]
\NC 2x + 3y \NC{} = 10 \NR
\NC 3x + 2y \NC{} = 5 \NR
\stopmatrix
\stopformula
\stoptext
Both work just fine, but with distance=0pt instead. Thanks! There is
only a minor problem with the former one: it's somehow shifted to the
left compared with the latter (both in MkII and MkIV). I have no idea
why.
mathcases has a numberdistance key, which adds some width at the end of
each row. You can set numberdistance to zero.
The {} after the alignment \NC is useful if the next symbol is something
that can be a uniary or binary symbol (eg, + or -). The {} tells tex to
treat is as a binary symbol.
Of course - the {} is an "ord" atom for TeX, AFAIR.
If you frequently need something like this, you can use
definemathcases/definemathmatrix to define a new environment with
appropriate parameters.
Yes; however, I'd still have to use the {} after the \NC...
Yes. You can define something like \OC (ord column) to be \NC{}.
Aditya
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