制作数学表达式以转到下一行

Question

我正在写一篇双栏格式的论文。我有一个如下的数学表达式

$G(s)= \frac{8s^7 + 414s^6 + 5682s^5 + 34380s^4 + 12564s^3 + 22088s^2 + 185660s + 4020}{s^8+66s^7+546s^6+4436s^5+22349s^4+63484s^3  +143124s^2+104684s+4020}$

此表达式越过第一列进入第二列。如果可能的话，我应该怎么做才能将分子和分母的一部分对齐到下一行。这不包含在 begin{equation} 和 end{equation} 中，我也不希望它包含在其中。这是一个简单的数学表达式，我想要像此链接中的图片中显示的那样 1]1

Answer 1

您可以使用splitfrac命令mathtools，该命令可以将分子或分母分成两行：

\documentclass[twocolumn]{book}
\usepackage[utf8]{inputenc}
\usepackage{fourier, heuristica}
\usepackage{mathtools}
\usepackage{lipsum}

\begin{document}

\lipsum[2]
\noindent$G(s)= \frac{\splitfrac{8s^7 + 414s^6 + 5682s^5 + 34380s^4 + 12564s^3 }{+ 22088s^2 + 185660s + 4020}}{\splitfrac{\rule{0pt}{1.9ex}\mathstrut s^8+66s^7+546s^6+4436s^5+22349s^4+63484s^3}{ +143124s^2+104684s+4020}}$

  \lipsum[3-6]

\end{document} 

Answer 2

无法将分数分割到各个行，无论是自动的还是手动的。

这里有三个建议，但第一个对于读者来说相当晦涩难懂；展示这样的大公式要好得多。

\documentclass{article}
\usepackage{amsmath}
\usepackage{nccmath} % for \mfrac

\begin{document}

Some text some text some text some text some text some text
some text some text some text some text some text some text
$G(s)= (8s^7 + 414s^6 + 5682s^5 + 34380s^4 + 12564s^3 + 22088s^2 + 185660s + 4020)%
       (s^8+66s^7+546s^6+4436s^5+22349s^4+63484s^3  +143124s^2+104684s+4020)^{-1}$
some text some text some text some text some text some text
some text some text some text some text some text some text
\[
G(s)= 
\tfrac{8s^7 + 414s^6 + 5682s^5 + 34380s^4 + 12564s^3 + 22088s^2 + 185660s + 4020}
     {s^8+66s^7+546s^6+4436s^5+22349s^4+63484s^3  +143124s^2+104684s+4020}
\]
some text some text some text some text some text some text
some text some text some text some text some text some text
\[
G(s)= 
\mfrac{8s^7 + 414s^6 + 5682s^5 + 34380s^4 + 12564s^3 + 22088s^2 + 185660s + 4020}
     {s^8+66s^7+546s^6+4436s^5+22349s^4+63484s^3  +143124s^2+104684s+4020}
\]
some text some text some text some text some text some text
some text some text some text some text some text some text

\end{document}

第一种方法对于两列来说可能很有用（尽管难以阅读）：

\documentclass[twocolumn]{article}
\usepackage{amsmath}

\begin{document}

Some text some text some text some text some text some text
some text some text some text some text some text some text
$G(s)= (8s^7 + 414s^6 + 5682s^5 + 34380s^4 + 12564s^3 + 22088s^2 + 185660s + 4020)%
       (s^8+66s^7+546s^6+4436s^5+22349s^4+63484s^3  +143124s^2+104684s+4020)^{-1}$
some text some text some text some text some text some text
some text some text some text some text some text some text

\end{document}