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如何标记公式编号但不改变参考文本？

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如何标记公式编号但不改变参考文本？

我想通过在方程编号上添加星号（或其他符号）来将一些方程标记为特殊方程。我按如下方式实现此目的：

\documentclass{article}

\usepackage{amsmath}

\newcommand{\markThisEquationSpecial}{\refstepcounter{equation}\tag{{\theequation}*}}

\begin{document}
Here is an important equation:
\begin{equation}
  \label{eq:important}
  S_{\text{EH}} = \int \frac{m_{p}^{2}}{2}R \sqrt{-g} d^{4}x\,.
\markThisEquationSpecial
\end{equation}
Here is an unimportant equation:
\begin{equation}
  \label{eq:unimportant}
  S_{\text{M}} = \int \frac{-1}{4}F_{ab}F^{ab} \sqrt{-g} d^{4}x\,.
\end{equation}

The unimportant equation is referenced as Eq.~\eqref{eq:unimportant}.
The important equation is referenced as Eq.~\eqref{eq:important}.
Notice that the asterisk has come along for the ride in the reference.
I would like it to appear as Eq.~(1).
\end{document}

如下所示： 平均能量损失

我怎样才能防止星号出现在文本中\ref？

或者，是否有某种方法可以将 放在(*)等式的左边，镜像等式编号的位置(1)，以此来标记等式的重要性？

答案1

这是一个相对简单的替代解决方案flalign：

\documentclass{article}
\usepackage{amsmath}
\usepackage{mathabx}% extra symbols

\begin{document}
Here is an important equation:
\begin{flalign}\label{eq:important}
\Asterisk && S_{\text{EH}} = \int \frac{m_{p}^{2}}{2}R \sqrt{-g} d^{4}x\,.&&
\end{flalign}

Here is an unimportant equation:
\begin{equation}
  \label{eq:unimportant}
  S_{\text{M}} = \int \frac{-1}{4}F_{ab}F^{ab} \sqrt{-g} d^{4}x\,.
\end{equation}

The unimportant equation is referenced as Eq.~\eqref{eq:unimportant}.
The important equation is referenced as Eq.~\eqref{eq:important}.
\end{document}

不相容方程

仔细想想，它在右侧也起作用。

\begin{flalign}\label{eq:important}
&& S_{\text{EH}} = \int \frac{m_{p}^{2}}{2}R \sqrt{-g} d^{4}x\,.&&\Asterisk
\end{flalign}

更重要

答案2

正如@Mico 在其评论中所说，添加*到方程编号中而不用于引用会导致混淆。由于您不喜欢使用框架或阴影框等（例如 empheq 包提供的内容）来强调方程的重要性，那么请查看方程的重要性是否足够，如您在此处所见： 在此处输入图片描述

代码 ：

\documentclass{article}

\usepackage{amsmath}
\usepackage{graphicx,pifont}

\newcommand{\alert}[1][3em]{%
    \marginpar[\raisebox{-#1}{\quad\huge\ding{43}\quad}]%
              {\raisebox{-#1}{\quad\reflectbox{\huge\ding{43}}}}
                    }

\begin{document}
Here is an important equation:
\alert\begin{equation}
  \label{eq:important}
  S_{\text{EH}} = \int \frac{m_{p}^{2}}{2}R \sqrt{-g} d^{4}x\,.
\end{equation}
Here is an unimportant equation:
\begin{equation}
  \label{eq:unimportant}
  S_{\text{M}} = \int \frac{-1}{4}F_{ab}F^{ab} \sqrt{-g} d^{4}x\,.
\end{equation}

The unimportant equation is referenced as Eq.~\eqref{eq:unimportant}.
The important equation is referenced as Eq.~\eqref{eq:important} \dots and marked on page border with \ding{43}.
\end{document}

您可以\ding{43}根据自己的喜好选择任何符号。

答案3

使用原始的“LaTeX \label”，而不是更新的amsmath \label：

在此处输入图片描述

\documentclass{article}

\usepackage{amsmath}

\newcommand{\markThisEquationSpecial}{%
  \refstepcounter{equation}%
  \tag{{\theequation}*}%
  }
\makeatletter
\newcommand{\ltxlabel}{\ltx@label}% Original LaTeX \label
\makeatother

\begin{document}
Here is an important equation:
\begin{equation}
  \label{eq:important}\ltxlabel{eq:important2}
  S_{\text{EH}} = \int \frac{m_{p}^{2}}{2}R \sqrt{-g} d^{4}x\,.
\markThisEquationSpecial
\end{equation}
Here is an unimportant equation:
\begin{equation}
  \label{eq:unimportant}
  S_{\text{M}} = \int \frac{-1}{4}F_{ab}F^{ab} \sqrt{-g} d^{4}x\,.
\end{equation}

The unimportant equation is referenced as Eq.~\eqref{eq:unimportant}.
The important equation is referenced as Eq.~\eqref{eq:important}.
Notice that the asterisk has come along for the ride in the reference.
I would like it to appear as Eq.~\eqref{eq:important2}.
\end{document}

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