我有以下示例：
\documentclass[journal=jacsat,manuscript=article]{achemso}
\usepackage{amsmath,amssymb}
\makeatletter
\newcommand*\bsse{%
\begin{singlespace}%
\vspace*{-\abovedisplayshortskip}
\vspace*{-\abovedisplayskip}
\noindent\ignorespaces
}
\newcommand*\esse{%
\vspace*{-\belowdisplayskip}
\end{singlespace}%
\noindent\ignorespaces
}
\newcommand*\bssag{%
\vspace*{-\abovedisplayskip}
\begin{singlespace}%
\noindent\ignorespaces
}
\newcommand*\essag{%
\vspace*{-\belowdisplayskip}
\end{singlespace}%
\noindent\ignorespaces
}
\makeatother
\BeforeBeginEnvironment{equation}{\bsse}
\AfterEndEnvironment{equation}{\esse}
\BeforeBeginEnvironment{gather}{\bssag}
\AfterEndEnvironment{gather}{\essag}
\BeforeBeginEnvironment{align}{\bssag}
\AfterEndEnvironment{align}{\essag}
\title{Title}
\begin{document}
Consider the following equations:
%
\begin{align}\label{xm_nuc}
E&=mc^2, \\
F&=ma, \\
v&=\frac{s}{t},
\end{align}
%
where the symbols are familiar to all of us.
\end{document}
此代码在最后一个方程 (v=s/t) 后创建了一个较大的垂直空间。您能帮我看看如何精确（而不是近似）删除 所放置的空间align吗？
编辑：
在页面上删除对齐周围的垂直空间，David Carlisle 提供了一个解决方案，我可以使用该解决方案删除等式后面的空格。
\documentclass[journal=jacsat,manuscript=article]{achemso}
\usepackage{amsmath}
\usepackage{etoolbox}
\newcommand{\zerodisplayskips}{%
\setlength{\abovedisplayskip}{0pt}%
\setlength{\belowdisplayskip}{0pt}%
\setlength{\abovedisplayshortskip}{0pt}%
\setlength{\belowdisplayshortskip}{0pt}}
\appto{\normalsize}{\zerodisplayskips}
\appto{\small}{\zerodisplayskips}
\appto{\footnotesize}{\zerodisplayskips}
\title{Title}
\begin{document}
Consider the following set of well-known equations:
%
\begin{align}\label{xm_nuc}
E&=mc^2, \\
F&=ma, \\
v&=\frac{s}{t},
\end{align}
%
where the symbols are familiar to all of us.
\end{document}
然而，这个解决方案并没有使方程式成为单倍行距。
答案1
可能最简单的方法是将显示空间设置为 0pt，然后通过将数学显示间距减少 9pt 来补偿双倍间距。
\documentclass[journal=jacsat,manuscript=article]{achemso}
\usepackage{amsmath,amssymb}
\AddToHook{env/align/begin}{\openup-9pt}
\title{Title}
\begin{document}
\setlength{\abovedisplayskip}{0pt}
\setlength{\belowdisplayskip}{0pt}
\setlength{\abovedisplayshortskip}{0pt}
\setlength{\belowdisplayshortskip}{0pt}
Consider the following equations:
%
\begin{align}\label{xm_nuc}
E&=mc^2, \\
F&=ma, \\
v&=\frac{s}{t},
\end{align}
%
where the symbols are familiar to all of us.
\end{document}