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Subject: Cannot use array in the formula?
Date: Tue, 24 May 2005 01:58:05 +0000
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I try to use:
\startformula
\left\{ \begin{array}{r@=l}
xx & yy \\
zz & aa
\end{array} \right.
\stopformula
But Context log says 
"Undefined control sequence \begin{array}."
How can I input multi-line equation in ConTeXt? Thanks

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