方程式周围的垂直间距。\abovedisplayshortskip 的问题

Question

我对方程式周围的间距感到困惑。

也许我读错了，但我的理解如下\abovedisplayskip，\abovedisplayshortskip它将控制公式周围的垂直间距/粘连。当段落的最后一行与行下的公式重叠时，应该应用第一个。否则，将应用第二个。

在下面的 MWE 中，我预计第二个方程会向上移动，因为-X\baselineskip该线与方程不重叠，但它不适用。

\documentclass[12pt]{article}
\usepackage{mathtools}
\usepackage[onehalfspacing]{setspace}
\newcommand\mathexpr{%
    \begin{align*}f(x) = \sqrt{A^2 + B^2 + C^2} \end{align*}}
\setlength{\parindent}{0pt}
\AtBeginDocument{%
    \setlength\abovedisplayskip{\baselineskip}
    \setlength\abovedisplayshortskip{-10\baselineskip}}

\begin{document}
As any dedicated reader can clearly see, the Ideal of practical reason of things.
\mathexpr

As any dedicated reader can clearly see, the Ideal of practical reason is a representation.
\mathexpr

As any dedicated reader can clearly see, the Ideal of practical reason of things.
\end{document}

Answer 1

AMS 对齐始终是全宽的，因此从不使用短跳。

如果你尝试一下\[\]，你会看到效果：

\documentclass[12pt]{article}
\usepackage{mathtools}
\usepackage[onehalfspacing]{setspace}
\newcommand\mathexpr{\[x=y\]}
\setlength{\parindent}{0pt}
\AtBeginDocument{%
    \setlength\lineskiplimit{-100pt}
    \setlength\abovedisplayskip{\baselineskip}
    \setlength\abovedisplayshortskip{-10\baselineskip}}

\begin{document}
As any dedicated reader can clearly see, the Ideal of practical reason of things.
\mathexpr

As any dedicated reader can clearly see, the Ideal of practical reason is a representation.
\mathexpr

As any dedicated reader can clearly see, the Ideal of practical reason of things.


\end{document}