[英]Numbering each line of equation in Latex
有没有办法用单独的子索引标记多行方程的每一行?
例如,我想得到......(在输出中)
a = b(1.23.1)
c = d(1.23.2)
= f(1.23.3)
然后能够参考整个多线方程(“见于1.23 bla bla bla ...”)或特定线(“在1.23.3中我们重新定义了d ......”)。
对于想要这个查询的答案的人来说,这是一个有用的tex.stackexchange答案: https ://tex.stackexchange.com/questions/118086/numbering-all-lines-of-an-array
要点如下:
%% in your preable
\usepackage{amsmath}
%% in your document
\begin{subequations}
\begin{align}
% YOUR MULTILINE MATHEMATICS WITH & ALIGNMENT CHARACTERS AND \\ NEWLINE MARKERS
% place \label{THIS-LINE} on each line, and you can cross-reference the line using \ref{THIS-LINE}
\end{align}
% place a \label{WHOLE-THING} here, and you can cross-reference the whole thing using \ref{WHOLE-THING}
\end{subequations}
这是一个例子:
\documentclass{article}
\usepackage[utf8]{inputenc}
\usepackage{amsmath}
\begin{document}
\begin{subequations}
\begin{align}
\frac{\mathrm{d} x}{\mathrm{d} t} &=\sigma(y-x)\label{eqn:line-1} \\
\frac{\mathrm{d} y}{\mathrm{d} t} &=x(\rho-z)-y\label{eqn:line-2} \\
\frac{\mathrm{d} z}{\mathrm{d} t} &=x y-\beta z
\end{align}
\label{eqn:all-lines}
\end{subequations}
Look at the first line \ref{eqn:line-1}, and now look at the second line \ref{eqn:line-2}. They are both part of the whole system \ref{eqn:all-lines}.
\end{document}
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