tex, Numbering a multi-part equation ?

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tex >> Numbering a multi-part equation ?

by northly » Tue, 11 Nov 2003 03:16:42 GMT

Hello,

I have a single equation which has two parts and I'd like to number
the first part, say 1a, and the second part 1b. I'd like the equation
to be numbered like this:

z+y : r>0 (1a)
x = {
z-y : r<0 (1b)

The current code i have so far which produces only one numeric numbering
for the whole equation is:

\begin{equation}
x = \left \{ \begin{array} {c @{\quad : \quad}c}
z+y & r>0 \\
z-y & r<0
\end{array} \right.
\end{equation}

Any help is appreciated.

sami

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tex >> Numbering a multi-part equation ?

by Herbert Voss » Tue, 11 Nov 2003 04:04:06 GMT


sami schrieb:

\documentclass[12 pt]{article}
\usepackage{amsmath}
\begin{document}

\begin{minipage}{0.9\textwidth}
\begin{align*}
x = \begin{cases}
z+y\quad &:\quad r>0\\
z-y\quad &:\quad r<0
\end{cases}
\end{align*}
\end{minipage}%
\begin{minipage}{0.05\textwidth}
\begin{subequations}
\begin{eqnarray}
\\
~
\end{eqnarray}
\end{subequations}
\end{minipage}

\end{document}


Herbert



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tex >> Numbering a multi-part equation ?

by Donald Arseneau » Tue, 11 Nov 2003 04:53:04 GMT

XXXX@XXXXX.COM (sami) writes:



\usepackage{cases}

Donald Arseneau XXXX@XXXXX.COM

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Numbering a multi-part equation ?

by northly » Thu, 13 Nov 2003 01:55:47 GMT

Thanks all

it works now.

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