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breqn 不会自动换行

tag-icon • tag-icon line-breaking breqn
breqn 不会自动换行

我遇到了环境问题breqn。以下代码不会自动换行，尽管有很多可行的断点，例如+。

\documentclass{article}
\usepackage{amsmath}
\usepackage{breqn}


\begin{document}

\begin{dmath}
(m \delta m ((i k_{y} \beta^{(p)} \zeta_{P} \rho_{c}^{(n)} p_{0}^2)/(2 g_{P} \sigma  p_{0}^6+8 m Q_{0}^3 \beta^{(n)} \sigma  p_{0}^4+g_{P} m Q_{0} \beta^{(p)} p_{0}^2)+(4 i Q_{0} (k_{y} Q_{0}^2 \zeta_{P} {\beta^{(p)}}^2+k_{y} (4 m \beta^{(n)} Q_{0}^3+g_{P} p_{0}^2) (g_{P} \lambda_{Q}-Q_{0} \beta^{(p)} \lambda_{2})) \rho_{c}^{(n)} (\rho_{c}^{(p)} \sigma  p_{0}^4-m \rho +m Q_{0} \beta^{(p)} \rho_{c}^{(p)}+\rho_{c}^{(p)}) p_{0}^2)/((2 g_{P} \sigma  p_{0}^6+8 m Q_{0}^3 \beta^{(n)} \sigma  p_{0}^4+g_{P} m Q_{0} \beta^{(p)} p_{0}^2) (g_{P}^2 m \rho_{c}^{(p)} p_{0}^4+4 m Q_{0}^2 \beta^{(p)} (Q_{0} \rho -g_{P} p_{0}^2 \rho_{c}^{(p)})-4 Q_{0}^3 \beta^{(p)} \rho_{c}^{(p)} (\sigma  p_{0}^4+1)))+(i k_{y} (4 m \beta^{(n)} Q_{0}^3+g_{P} p_{0}^2) (2 Q_{0} \lambda_{Q}-p_{0}^2 \lambda_{2}) \rho_{c}^{(n)})/(Q_{0} (2 g_{P} \sigma  p_{0}^6+8 m Q_{0}^3 \beta^{(n)} \sigma  p_{0}^4+g_{P} m Q_{0} \beta^{(p)} p_{0}^2))))/(4 \rho_{c}^{(n)})
\end{dmath}

\end{document}

上面的代码给出： 这

任何能够自动打破这种类型方程的替代方法都值得赞赏。

答案1

你可以直接使用原始的 TeX 换行符而根本不使用任何包（breqn 可以避免在里面换行()）

在此处输入图片描述

\documentclass{article}
\usepackage{amsmath}

\begin{document}

\begin{center}\renewcommand\baselinestretch{1.7}\selectfont
$\displaystyle
  (m \delta m ((i k_{y} \beta^{(p)} \zeta_{P} \rho_{c}^{(n)}
  p_{0}^2)/(2 g_{P} \sigma p_{0}^6+8 m Q_{0}^3 \beta^{(n)} \sigma
  p_{0}^4+g_{P} m Q_{0} \beta^{(p)} p_{0}^2)+(4 i Q_{0} (k_{y} Q_{0}^2
  \zeta_{P} {\beta^{(p)}}^2+k_{y} (4 m \beta^{(n)} Q_{0}^3+g_{P}
  p_{0}^2) (g_{P} \lambda_{Q}-Q_{0} \beta^{(p)} \lambda_{2}))
  \rho_{c}^{(n)} (\rho_{c}^{(p)} \sigma p_{0}^4-m \rho +m Q_{0}
  \beta^{(p)} \rho_{c}^{(p)}+\rho_{c}^{(p)}) p_{0}^2)/((2 g_{P} \sigma
  p_{0}^6+8 m Q_{0}^3 \beta^{(n)} \sigma p_{0}^4+g_{P} m Q_{0}
  \beta^{(p)} p_{0}^2) (g_{P}^2 m \rho_{c}^{(p)} p_{0}^4+4 m Q_{0}^2
  \beta^{(p)} (Q_{0} \rho -g_{P} p_{0}^2 \rho_{c}^{(p)})-4 Q_{0}^3
  \beta^{(p)} \rho_{c}^{(p)} (\sigma p_{0}^4+1)))+(i k_{y} (4 m
  \beta^{(n)} Q_{0}^3+g_{P} p_{0}^2) (2 Q_{0} \lambda_{Q}-p_{0}^2
  \lambda_{2}) \rho_{c}^{(n)})/(Q_{0} (2 g_{P} \sigma p_{0}^6+8 m
  Q_{0}^3 \beta^{(n)} \sigma p_{0}^4+g_{P} m Q_{0} \beta^{(p)}
  p_{0}^2))))/(4 \rho_{c}^{(n)})$
  
\end{center}


\end{document}

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