我使用罗马数字来表示章节和部分，使用阿拉伯数字来表示定理。
当我想引用\phantomsection定理中的引用时，我发现引用会变回阿拉伯数字。我该如何解决这个问题？
\documentclass{report}
\renewcommand{\thechapter}{\Roman{chapter}}
\renewcommand{\thesection}{\thechapter.\Roman{section}}
\usepackage{amsthm,hyperref}
\newtheorem{theorem}{Theorem}[chapter]
\renewcommand{\thetheorem}{\arabic{chapter}.\arabic{theorem}}
\begin{document}
\chapter{A}
\section{A}
\begin{theorem}
asdf asdf asd asd asd fasd asd asdf asd asd asd asd a sdfas dsa as dfasd as dfas df asd a dfsda \phantomsection\label{LABEL}$Ax=b$.
\end{theorem}
I want \ref{LABEL} to be \thesection. Could not understand why redefining \textbackslash thetheorem affects \textbackslash thesection.
\end{document}
答案1
A\label通常是指最后一个\refstepcounter应用的计数器在同一范围内。
\label通常不建议在远离计数器“refstepped”的地方发出，因为参考是不可预测的。
该命令\phantomsection实际上与部分无关。之所以选择这个名字，是因为它最常见的用途是模拟部分命令的存在，但它只是为超链接设置一个锚点。
我建议定义您的特殊标签命令：
\documentclass{report}
\renewcommand{\thechapter}{\Roman{chapter}}
\renewcommand{\thesection}{\thechapter.\Roman{section}}
\usepackage{amsthm,hyperref}
\newtheorem{theorem}{Theorem}[chapter]
\renewcommand{\thetheorem}{\arabic{chapter}.\arabic{theorem}}
\makeatletter
\newcommand{\seclabel}[1]{%
\@bsphack
\csname phantomsection\endcsname
\begingroup
\let\@bsphack\relax\let\@esphack\relax % we don't want them here
\edef\@currentlabel{\thesection}%
\label{#1}%
\endgroup
\@esphack
}
\makeatother
\begin{document}
\chapter{A}
\section{A}
\begin{theorem}
asdf asdf asd asd asd fasd asd asdf asd asd asd asd a sdfas dsa
as dfasd as dfas df asd a dfsda \seclabel{LABEL}$Ax=b$.
\end{theorem}
I want \ref{LABEL} to be \thesection.
\end{document}
答案2
我认为您的真正目的是将给定的内联公式变成超目标，以便读者可以通过“单击”文档中其他位置适当构建的超链接从文档的其他位置“跳转”到该公式。
如果是这种情况，则该\phantomsection指令不是适合该工作的工具。相反，请查看包提供的\hypertarget和宏。\hyperrefhyperref
\documentclass{report}
\usepackage{hyperref}
\begin{document}
\noindent
Once upon a time. Once upon a time. Once upon a time. Once upon a time.
Once upon a time. Once upon a time. Once upon a time. Once upon a time.
\hypertarget{emc2}{$E=mc^2$}.
Once upon a time. Once upon a time. Once upon a time. Once upon a time.
Once upon a time. Once upon a time. Once upon a time. Once upon a time.
\bigskip\noindent
Once upon a time. Once upon a time. Once upon a time. Once upon a time.
Once upon a time. Once upon a time. Once upon a time. Once upon a time.
\hyperlink{emc2}{An inline formula}.
Once upon a time. Once upon a time. Once upon a time. Once upon a time.
Once upon a time. Once upon a time. Once upon a time. Once upon a time.
\end{document}
\hypertarget请注意和的第一个参数hyperref必须相同。
还请注意，内联公式是不是与方程编号或任何其他计数器变量有意义地相关联。
答案3
\phantomsection 与节无关，它仅设置匿名锚点。标签的打印布局仅取决于 的位置\label。
\label您可以通过移动定理环境后面来获得想要的输出：
\documentclass{report}
\renewcommand{\thechapter}{\Roman{chapter}}
\renewcommand{\thesection}{\thechapter.\Roman{section}}
\usepackage{amsthm,hyperref}
\newtheorem{theorem}{Theorem}[chapter]
\renewcommand{\thetheorem}{\arabic{chapter}.\arabic{theorem}}
\begin{document}
\chapter{A}
\section{A}
\begin{theorem}
asdf asdf asd asd asd fasd asd asdf asd asd asd asd a sdfas dsa as dfasd as dfas df asd a dfsda \phantomsection$Ax=b$.
\end{theorem}\label{LABEL}
I want \ref{LABEL} to be \thesection. Could not understand why redefining \textbackslash thetheorem affects \textbackslash thesection.
\end{document}
但更安全的是使用两个标签，一个用于数字，一个用于锚点：
\documentclass{report}
\renewcommand{\thechapter}{\Roman{chapter}}
\renewcommand{\thesection}{\thechapter.\Roman{section}}
\usepackage{amsthm,hyperref}
\newtheorem{theorem}{Theorem}[chapter]
\renewcommand{\thetheorem}{\arabic{chapter}.\arabic{theorem}}
\begin{document}
\chapter{A}
\section{A}\label{section}
\begin{theorem}
asdf asdf asd asd asd fasd asd asdf asd asd asd asd a sdfas dsa as dfasd as dfas df asd a dfsda \phantomsection\label{position}$Ax=b$.
\end{theorem}
I want \hyperref[position]{\ref*{section}} to be \thesection. Could not understand why redefining \textbackslash thetheorem affects \textbackslash thesection.
\end{document}