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使用 thmtools 进行自定义 QED 对齐

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使用 thmtools 进行自定义 QED 对齐

我正在尝试使用该包创建自定义定理格式thmtools。但是，我在 QED 符号的对齐方面遇到了问题。当我用普通文本结束定理时，它会将 QED 符号放在行末，而当我以方程式结束并使用时\qedhere，它会将 QED 符号放在方程式的旁边。但是，我想要相反的结果：让 QED 位于带有方程式的行末，并紧挨着普通文本的句号。

您可以在下面看到我的 MWE：

\usepackage{amsmath}
\usepackage{amsthm}
\usepackage{thmtools}
\usepackage{ifthen}
\usepackage{calc}

\declaretheoremstyle[
    spaceabove=10pt,
    headpunct={},
    headformat=\ifthenelse{ \equal{\NOTE}{} }%
    {% yes
    $\underset{%
        \raisebox{2pt}[0pt][0pt]{%
        \rule{\widthof{\text{\NAME\ \NUMBER}}+6ex}{.1ex}}%
        }{%
        \text{\NAME\ \NUMBER}\hfill%
        }$%
    }{% no
    $\underset{%
        \raisebox{5.5pt}[0pt][0pt]{%
        \rule{\widthof{\text{\NAME\ \NUMBER\hspace{1ex}$|$\hspace{1ex}\NOTE}}+6ex}{.1ex}}%
        }{%
        \text{\NAME\ \NUMBER\hspace{1ex}$\bm{|}$\hspace{1ex}\NOTE}\hfill%
        }$%
    }\newline,
    spacebelow=10pt,
    qed=\qedsymbol
]{thmdefault}

\declaretheorem[style=thmdefault]{Theorem}

\begin{document}

Here is some text.

\begin{Theorem}[Important Theorem]
    This is a theorem. Notice that this QED symbol is right next to my equation. I would like it at the end of that line. $$a^2 + b^2 = c^2\qedhere$$
\end{Theorem}

Here is some more text.

\begin{Theorem}[Another Theorem]
    This is another theorem. Notice that the QED symbol is placed at the end of the line. I would like it right next to this period.
\end{Theorem}

And here is a little more text.

\end{document}

（我包含了较大的headformat选项，因为如果没有它，QED 的行为就不会相同。）

这似乎是一个非常简单的问题并且有一个简单的解决方案（我才刚刚开始学习 LaTeX），但经过几天的搜索，我似乎找不到解决方案。

答案1

您需要使用\[...\]进行显示数学运算它会设置\qedhere在您想要的位置。对于与文本相关的调整，我们重新定义\qed为不包括\hfill：

在此处输入图片描述

\documentclass{article}
\usepackage{amsmath,amsthm,bm,thmtools}
\usepackage{ifthen}
\usepackage{calc}

\declaretheoremstyle[
  spaceabove=10pt,
  headpunct={},
  headformat=\ifthenelse{ \equal{\NOTE}{} }%
  {% yes
  $\underset{%
    \raisebox{2pt}[0pt][0pt]{%
    \rule{\widthof{\text{\NAME\ \NUMBER}}+6ex}{.1ex}}%
    }{%
    \text{\NAME\ \NUMBER}\hfill%
    }$%
  }{% no
  $\underset{%
    \raisebox{5.5pt}[0pt][0pt]{%
    \rule{\widthof{\text{\NAME\ \NUMBER\hspace{1ex}$|$\hspace{1ex}\NOTE}}+6ex}{.1ex}}%
    }{%
    \text{\NAME\ \NUMBER\hspace{1ex}$\bm{|}$\hspace{1ex}\NOTE}\hfill%
    }$%
  }\newline,
  spacebelow=10pt,
  qed=\qedsymbol
]{thmdefault}

\declaretheorem[style=thmdefault]{Theorem}

% Update \qed to remove \hfill
\DeclareRobustCommand{\qed}{%
  \ifmmode
    \mathqed
  \else
    \leavevmode\unskip
    \penalty 9999
    \hbox{}\nobreak\quad\hbox{\qedsymbol}
  \fi
}
\begin{document}

Here is some text.

\begin{Theorem}[Important Theorem]
This is a theorem. Notice that this QED symbol is right next to my equation.
I would like it at the end of that line.
\[
  a^2 + b^2 = c^2\qedhere
\]
\end{Theorem}

Here is some more text.

\begin{Theorem}[Another Theorem]
This is another theorem. Notice that the QED symbol is placed at the end of the line. 
I would like it right next to this period.
\end{Theorem}

And here is a little more text.

\end{document}

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