我想创建一个引用定理编号而不是页码的索引。
以下示例创建带有页码的常用索引：
\documentclass[ngerman, 12pt]{article}
\usepackage{makeidx}
\makeindex
\newtheorem{theorem}{Theorem}
\begin{document}
\begin{theorem}
This theorem is about apples \index{apple} and bananas\index{banana}.
\end{theorem}
\begin{theorem}
This theorem is about apples \index{apple} and pies\index{pie}.
\end{theorem}
\newpage
\begin{theorem}
This theorem is about bananas\index{banana}.
\end{theorem}
\printindex
\end{document}
结果如下：
索引
苹果 1
香蕉 1 馅饼
2
然而，我需要索引中的定理编号，即
索引
苹果，1，2
香蕉，1，3 馅饼
，2
有人知道怎么做吗？非常感谢您的支持！
答案1
\index写出 的值\thepage。只需将其更改为 即可\thetheorem。
\documentclass[12pt]{article}
\usepackage{etoolbox}
\usepackage{makeidx}
\makeindex
\makeatletter
\patchcmd\@wrindex{\thepage}{\thetheorem}{}{}
\makeatother
\newtheorem{theorem}{Theorem}
\begin{document}
\begin{theorem}
This theorem is about apples\index{apple} and bananas\index{banana}.
\end{theorem}
\begin{theorem}
This theorem is about apples\index{apple} and pies\index{pie}.
\end{theorem}
\newpage
\begin{theorem}
This theorem is about bananas\index{banana}.
\end{theorem}
\printindex
\end{document}
