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参考方程内线包含几个方程

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参考方程内线包含几个方程

我想使用我在一些旧论文中见过的一种参考样式，作者会在同一行中列出几个方程式，但所有方程式只有一个参考编号。然后，如果作者只想引用该行中的一个方程式，他们会使用下标或上标来引用。示例：

a+b=c ; a*b=d  .................. (1)

因此，带有和的方程由方程 (1) aa+b=c给出。

以下是 MWE：

\documentclass[12pt]{article}
\usepackage{amsmath} % Extra Math Stuff
\begin{document}

I would like to have 3 equations together like this
\begin{equation}
A+B=C %\label{eq:sum}
\quad\textrm{,}\quad
A\times B=D %\label{eq:mul}
\qquad\textrm{,}\quad
A/B=D %\label{eq:div}
\label{eq:tog}
\end{equation}

And now I would like to either reference all equations in \eqref{eq:tog} or each of them individually, which should look like \eqref{eq:tog}$_a$, \eqref{eq:tog}$_b$ and \eqref{eq:tog}$_c$.

\end{document}

答案1

\eqref使用双重嵌套设置引用\upshape（来自amsmath.dtx)：

\newcommand{\eqref}[1]{\textup{\tagform@{\ref{#1}}}}

下面我所做的是创建一个手册参考，假设您将使用\eqref{<subref>}，因此将子方程编号的打印延迟两组（使用嵌套\AfterGroup的etextools)：

在此处输入图片描述

\documentclass{article}

\usepackage{amsmath,etextools}

\newcounter{subeqn}[equation]
\renewcommand{\thesubeqn}{\alph{subeqn}}
\makeatletter
\newcommand{\sublabel}[1]{{%
  \stepcounter{subeqn}
  \def\@currentlabel{\theequation\protect\AfterGroup{\protect\AfterGroup{\protect\textsubscript{\thesubeqn}}}}%
  \ltx@label{#1}%
}}
\makeatother

\begin{document}

I would like to have 3 equations together like this:
\begin{equation}
  A + B = C \sublabel{eq:sum}
  \textrm{,}\qquad
  A \times B = D \sublabel{eq:mul}
  \textrm{,}\qquad
  A \div B = D \sublabel{eq:div}
  \label{eq:tog}
\end{equation}

And now I would like to either reference all equations in \eqref{eq:tog} 
or each of them individually, which should look like \eqref{eq:tog}$_a$, 
\eqref{eq:tog}$_b$ and \eqref{eq:tog}$_c$.

And now I would like to either reference all equations in \eqref{eq:tog} 
or each of them individually, which should look like \eqref{eq:sum}, 
\eqref{eq:mul} and \eqref{eq:div}.

\end{document}

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