章节标题中的 \mathsmaller 与 hyperref 不兼容

Question

我想\mathsmaller在章节标题中使用，但它与 不兼容hyperref。以下是 MWE：

    \documentclass{book}
\usepackage{amsmath}    %automatically loads ansbsy which gives \boldsymbol
\usepackage{relsize}
\usepackage{hyperref}
\begin{document}

$\mathcal{SQUARING}^{+}$%compiles

$\mathsmaller{SQUARING^{+}}$%compiles

$\mathsmaller{\mathcal{SQUARING}^{+}}$%compiles

\section{$\mathcal{SQUARING}^{+}$ }%compiles

%\section{Function $\mathsmaller{SQUARING}^{+}$ }%does NOT compile with hyperref

%\section{Function $\mathsmaller{\mathcal{SQUARING}^{+}}$}%does NOT compiles with hyperref

\end{document}

Answer 1

• 看看\texorpdfstring宏，用于分段标题。第二个参数——要写入 pdf 书签的材料——不应包含 TeX 类型的数学代码。
• 我个人认为结果看起来相当丑陋:)。

---

\documentclass{article}
\usepackage{amsmath}
\usepackage{relsize}
\usepackage{hyperref}

\begin{document}

$\mathcal{SQUARING}^{+}$%compiles
$\mathsmaller{SQUARING^{+}}$%compiles
$\mathsmaller{\mathcal{SQUARING}^{+}}$%compiles

% note the use of \texorpdfstring in `\section` directives
\section{%
    \texorpdfstring{$\mathcal{SQUARING}^{+}$}% Code for text
                   {SQUARING+}% Code for PDF bookmark
}
\section{%
    \texorpdfstring{$\mathsmaller{SQUARING}^{+}$}% Code for text
                   {SQUARING+}% Code for PDF bookmark
}

\end{document}

---

编辑 2022-01-26

% 3rd Version
\section{%
    \texorpdfstring{$\mathsmaller{\mathcal{SQUARING}^{+}}$}% Code for text
                   {SQUARING+}% Code for PDF bookmark
}
% 4th Version
\section{%
    \texorpdfstring{$\mathsmaller{\mathtt{SQUARING}^{+}}$}% Code for text
                   {SQUARING+}% Code for PDF bookmark
}