intertext / shortintertext 与 revtex 产生较大的虚假间距

Question

\intertext我正处于使用/与 Revtex 文档类的情况\shortintertext，但似乎存在一些间距问题。

考虑：

\documentclass[aps,prl,reprint]{revtex4-1}
% \documentclass{article}
\usepackage{mathtools}
\usepackage{bm}
\usepackage{newtxtext,newtxmath}
\usepackage{lipsum}

\begin{document}
\lipsum*[1]
\begin{subequations}
    \begin{align}
    \varepsilon_0(\bm{q}) &= \varepsilon_1(\bm{q}) = 0 \\
    \varepsilon_2(\bm{q}) &=\beta \bigl[ 4(1 - J') + 4J' Q - 2(1+2J')\sqrt{1+Q} \, \bigr]\\
    \varepsilon_3(\bm{q}) &= \beta \bigl[4(1 - J') + 4J' Q + 2(1+2J')\sqrt{1+Q} \, \bigr] \,, \\
    \shortintertext{and}
    Q &= a + b + c + d + e + f - 3
    \end{align}
\end{subequations}
\lipsum*[1-3]
\end{document}

并且文本前后有很大的间距and。如果我将文档类切换为，则不会出现这种情况article，那么如何修复此问题？

ps. 奇怪的是，使用\shortintertext会产生一个更大间距比\intertext..为什么会这样？

Answer 1

\intertext您可以修改和之前和之后的垂直空间\shortintertext：这是一种可能性，请根据您的需要进行调整。

\documentclass[aps,prl,reprint]{revtex4-1}
\usepackage{mathtools}
\usepackage{newtxtext,newtxmath}
\usepackage{bm}
\usepackage{lipsum}

\mathtoolsset{
  above-shortintertext-sep=-\belowdisplayshortskip,
  below-shortintertext-sep=-\abovedisplayskip,
  above-intertext-sep=0pt, % default
  below-intertext-sep=-.5\abovedisplayskip,
}

\begin{document}
\lipsum*[1]
\begin{subequations}
\begin{align}
\varepsilon_0(\bm{q}) &= \varepsilon_1(\bm{q}) = 0 \\
\varepsilon_2(\bm{q}) &=\beta \bigl[ 4(1 - J') + 4J' Q - 2(1+2J')\sqrt{1+Q} \, \bigr]\\
\varepsilon_3(\bm{q}) &= \beta \bigl[4(1 - J') + 4J' Q + 2(1+2J')\sqrt{1+Q} \, \bigr] \,, \\
\shortintertext{and}
Q &= a + b + c + d + e + f - 3
\end{align}
\end{subequations}
\lipsum*[4]
\begin{subequations}
\begin{align}
\varepsilon_0(\bm{q}) &= \varepsilon_1(\bm{q}) = 0 \\
\varepsilon_2(\bm{q}) &=\beta \bigl[ 4(1 - J') + 4J' Q - 2(1+2J')\sqrt{1+Q} \, \bigr]\\
\varepsilon_3(\bm{q}) &= \beta \bigl[4(1 - J') + 4J' Q + 2(1+2J')\sqrt{1+Q} \, \bigr] \,, \\
\intertext{and}
Q &= a + b + c + d + e + f - 3
\end{align}
\end{subequations}
\lipsum
\end{document}

Answer 2

\intertext我建议采用这种解决方法：使用包中引入的可选参数nccmath：

\documentclass[aps,prl,reprint]{revtex4-1}
% \documentclass{article}
\usepackage{newtxtext,newtxmath}
\usepackage{mathtools, bm, nccmath}
\usepackage{lipsum}

\begin{document}

\lipsum*[1]
\begin{subequations}
    \begin{align}
    \varepsilon_0(\bm{q}) &= \varepsilon_1(\bm{q}) = 0 \\
    \varepsilon_2(\bm{q}) &=\beta \bigl[ 4(1 - J') + 4J' Q - 2(1+2J')\sqrt{1+Q} \, \bigr]\\
    \varepsilon_3(\bm{q}) &= \beta \bigl[4(1 - J') + 4J' Q + 2(1+2J')\sqrt{1+Q} \, \bigr] \,, \\
    \intertext[0 ex]{and}
    Q &= a + b + c + d + e + f - 3
    \end{align}
\end{subequations}
\lipsum*[1-3]

\end{document}