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在标题中包含类似定理的项目名称，并在可选参数中包含数学字母

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在标题中包含类似定理的项目名称，并在可选参数中包含数学字母

在将当前定理类项目的名称/编号放在标题中，Gustavo Mezzetti 发布了一个答案，允许在页眉中包含当前类似定理的项目的名称和编号。

问题

\theorem但是，当等采用包含某些数学字母字符的可选参数时，该答案会失败，包括\mathbb（但对于普通数学字母来说是可以的）。

我怀疑需要进行额外的修复\protect，但我不确定是什么。有什么建议吗？

测试示例

这个例子缩短了Mezzetti的代码，以消除不相关的内容（例如，测试是否amsthm已加载）。

\documentclass{book}

\usepackage{amsmath}
\usepackage{amsthm}
\usepackage{amsfonts}

\newtheorem{theorem}{Theorem}
\newtheorem{corollary}[theorem]{Corollary}

\usepackage{etoolbox} % needed for headings wizardry, below

\usepackage{fancyhdr}

\fancyhf{}
\fancyhead[LE,RO]{\thepage}
\fancyhead[RE,LO]{\myBotmark} % "RE" just for testing purposes
\pagestyle{fancy}

%%%%%%%% BEGIN WIZARDRY %%%%%%%%

\makeatletter

\@ifdefinable\@my@claim@mark{\newmarks\@my@claim@mark}
\newcommand*\myMark[1]{\marks\@my@claim@mark{#1}}
\newcommand*\myBotmark{\botmarks\@my@claim@mark}

       \patchcmd{\@begintheorem}{% search for:
        \thm@swap\swappedhead\thmhead % more specific than before
    }{% replace with:
        \myMark{#1\@ifnotempty{#2}{\ #2}\@ifnotempty{#3}{\ (#3)}}%
        \thm@swap\swappedhead\thmhead
    }    

\makeatother

%%%%%%%%  END WIZARDRY  %%%%%%%%

 \begin{document}

Denote the reals by $\mathbb{R}$.

\begin{theorem}[about \protect $\mathbb{R}$] % gives error
%\begin{theorem}[about $R$] % so would this be OK
%\begin{theorem}[about reals] % this would be OK

Big result!

\end{theorem}

\newpage

%\begin{corollary}[special case for $\mathbb{Q}$]
 \begin{corollary}[special case for $Q$]
 %\begin{corollary}[special case for rationals]

Another assertion.

\end{corollary}

\end{document}

运行 pdflatex 时出现的错误是：

...42: Undefined control sequence.
\GenericError   ...
                           #4   \errhelp \@err@   ...
l.42   \begin{theorem}[about \protect $\mathbb{R}$] 
                                          % gives error

最终错误原因的线索？

注释掉所有引用fancyhdr并注释掉所有与此相关的补丁代码，但现在插入

\usepackage{thmtools}

在序言和

\listoftheorems

在文档主体中。那么$\mathbb{R}$在定理的可选参数中不定理列表排版错误 — — 即使没有任何\protect可选参数。

amsthm所有这些都表明错误源于与或交互的代码“魔法”中的某些东西fancyhdr。

答案1

在向您推荐我之前的答案，现在已更新请允许我提请大家注意以下事实：

  1. 该代码\protect $\mathbb{R}$是错误的（至少）有两个原因，第一个原因\protect是仅有的到以下标记，在本例中为 $；但$它本身是强大的，因为它是 TeX 的一个原始命令，因此是一个不可扩展的标记。

  2. 无论如何，即使$\protect\mathbb{R}$是错误的，或者更确切地说，也是无用的，因为\mathbbLaTeX 内核已经使其变得强大。

  3. \patchcmd需要五参数：

    \patchcmd{<cmd>}{<search>}{<replace>}{<success>}{<failure>}

    其中<success>和分别<failure>是成功或失败时要执行的代码片段\patchcmd。如果您不想执行任何代码，请将它们留空，但您不能简单地省略它们。在您的示例中，您非常幸运，a\par和 the\makeatother被吞噬了……

为了方便起见，我还将在此处保留精简的代码以用于该amsmath软件包。我邀请您尝试一下：我\protect在命令中添加了管理功能\myMark。在以前的版本中省略了这一点肯定是一个错误：看看它现在是否有效。

\documentclass[a4paper,twoside]{article}
\usepackage[T1]{fontenc} % Not necessary, but recommended.
\usepackage{etoolbox}

\usepackage{amsthm} % we have decided to go for this one
\usepackage{amsfonts}

\usepackage{fancyhdr}
\usepackage{lipsum}

\fancyhf{}
\fancyhead[LE,RO]{\thepage}
\fancyhead[RE,LO]{\myBotmark} % "RE" just for testing purposes
\pagestyle{fancy}

\newtheorem{theorem}{Theorem}[section] % or "[chapter]", or whatever
\newtheorem{lemma}  {Lemma}  [section]
\newtheorem*{spclaim}{Special Claim}
\swapnumbers
\theoremstyle{definition}
\newtheorem{defin}{Definition}[section]



%%%%%%%% BEGIN WIZARDRY %%%%%%%%

\makeatletter

\@ifdefinable\@my@claim@mark{\newmarks\@my@claim@mark}
\newcommand*\myMark[1]{% <<< MODIFIED
    \begingroup
        \let\label\relax \let\index\relax \let\glossary\relax
        \let\protect\@unexpandable@protect
        \marks\@my@claim@mark{#1}%
    \endgroup
}
\newcommand*\myBotmark{\botmarks\@my@claim@mark}

\typeout{****************************************}
\newcommand*\my@direct@mark[3]{%
    \myMark{%
        \thmname{#1}%
        \thmnumber{\thmname{\ }#2}%
        \thmnote{\ (#3)}%
    }%
}
\newcommand*\my@swapped@mark[3]{%
    \myMark{%
        \thmnumber{#2}%
        \thmname{\thmnumber{\ }#1}%
        \thmnote{\ (#3)}%
    }%
}
\patchcmd{\@begintheorem}{% search for:
    \thm@swap\swappedhead\thmhead % more specific than before
}{% replace with:
    \thm@swap\my@swapped@mark\my@direct@mark{#1}{#2}{#3}%
    \thm@swap\swappedhead\thmhead
}{% execute if succeeded:
    \typeout{>>> Made patch specific for amsthm.}
}{% execute if failed:
    \typeout{>>> Patch specific for amsthm FAILED!}
}
\typeout{****************************************}

\makeatother

%%%%%%%%  END WIZARDRY  %%%%%%%%



\begin{document}

\section{First section}

\lipsum[1]

\begin{theorem}
    This is the first theorem of the first section.
\end{theorem}

\lipsum[2]

\begin{theorem}
    This is the second theorem of the first section.
\end{theorem}

\begin{theorem}[Donald Duck and~$\mathbb{Q}$]
    This is the third theorem of the first section.
\end{theorem}

\begin{spclaim}
    This is a special claim.
\end{spclaim}

\lipsum[3-16]

\begin{theorem}
    This is the fourth theorem of the first section.
\end{theorem}

\begin{defin}[Something new]
    This is the first definition of the first section.
\end{defin}

\begin{defin}
    This is the second definition of the first section.
\end{defin}

\lipsum[17]

\begin{lemma}
    This is the first lemma of the first section.
\end{lemma}

\lipsum[18]

\begin{theorem}
    This is the fifth theorem of the first section.
\end{theorem}

\lipsum[19-20]

\begin{lemma}[Uncle Scrooge and~$\mathbb{R}$]
    This is the second lemma of the first section.
\end{lemma}

\lipsum[21-32]

\begin{theorem}
    This is the sixth theorem of the first section.
\end{theorem}

\lipsum[33-36]

\begin{theorem}
    This is the seventh theorem of the first section.
\end{theorem}

\begin{lemma}
    This is the third lemma of the first section.
\end{lemma}

\begin{theorem}[Mickey Mouse and~$\mathbb{C}$]
    This is the eighth theorem of the first section.
\end{theorem}

\lipsum[37-40]

\begin{theorem}
    This is the ninth theorem of the first section.
\end{theorem}

\lipsum[41-48]

\begin{defin}
    This is the third definition of the first section.
\end{defin}

\lipsum[49-64]

\begin{theorem}[The last one]
    This is the tenth theorem of the first section.
\end{theorem}

\lipsum[65-80]

\begin{lemma}
    This is the fourth lemma of the first section.
\end{lemma}

\begin{lemma}
    This is the fifth lemma of the first section.
\end{lemma}

\begin{lemma}
    This is the sixth lemma of the first section.
\end{lemma}

\begin{lemma}
    This is the seventh lemma of the first section.
\end{lemma}

\begin{lemma}
    This is the eighth lemma of the first section.
\end{lemma}

\begin{lemma}
    This is the ninth lemma of the first section.
\end{lemma}

\begin{lemma}[Deep breath]
    This is the tenth lemma of the first section.
\end{lemma}

\lipsum[81-84]

\begin{lemma}
    This is the eleventh lemma of the first section.
\end{lemma}

\begin{lemma}
    This is the twelfth lemma of the first section.
\end{lemma}

\begin{lemma}
    This is the thirteenth lemma of the first section.
\end{lemma}

\begin{lemma}
    This is the fourteenth lemma of the first section.
\end{lemma}

\begin{lemma}
    This is the fifteenth lemma of the first section.
\end{lemma}

\begin{lemma}[Hexadecimal deep breath]
    This is the sixteenth lemma of the first section.
\end{lemma}

% \lipsum[85-96]

\end{document}

请注意，一旦您通知我您已阅读该答案，我就会删除该答案：它实际上是我所引用的另一个答案的重复。

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