名前: . 日時: 2005-12-04 18:30:32 IPアドレス: 59.134.169.*
>>39669 \label をつけていないのでは,相互参照できないのは当然のようですが? \documentclass{article} \begin{document} \[ \begin{array}{@{}l@{\qquad}r@{\hskip3em}l@{\qquad}r@{}} A_1 = a_{11} x_1 + a_{12} y_1 & \refstepcounter{equation} \mbox{(\theequation)} \label{eq:1st} & A_2 = a_{21} x_2 + a_{22} y_2 & \refstepcounter{equation} \mbox{(\theequation)} \label{eq:2nd} \\ A_3 = a_{31} x_3 + a_{32} y_3 & \refstepcounter{equation} \mbox{(\theequation)} \label{eq:3rd} & A_4 = a_{41} x_4 + a_{42} y_4 & \refstepcounter{equation} \mbox{(\theequation)} \label{eq:4th} \end{array} \] See equations~(\ref{eq:1st})--(\ref{eq:4th}). \end{document}
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