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Can I page-break automatically a large number of equations in the same subequation-environment? I have to put them in an appendix and I cannot continuously change where the align-groups begin and end. As a result, the appendix starts in a new page, and worse, sometimes also with one blank page before it.

The align groups seem unnatural, but I have to create them in order for page-break to take place. Could this be achieved automatically?

\documentclass[11.5pt,a4paper ]{amsart}

\usepackage{lipsum} 
\usepackage{latexsym,amssymb,enumerate}
\usepackage[english]{babel}

\begin{document} 

\section{First Section}
\lipsum[1]
\lipsum[2]

\appendix
\section{Long proof that nobody wants to read}
\begin{subequations}
\begin{align}
\mbox{long } &   \mbox{list}  \\
\mbox{of} & \mbox{equations} \nonumber \\
\mbox{which } & \mbox{I cannot suppress} \nonumber \\
\mbox{long } &   \mbox{list}  \\
\mbox{of} & \mbox{equations} \nonumber \\
\mbox{which } & \mbox{I cannot suppress} \nonumber \\
\mbox{long } &   \mbox{list}  \\
\mbox{of} & \mbox{equations} \nonumber \\
\mbox{which } & \mbox{I cannot suppress} \nonumber \\
\mbox{long } &   \mbox{list}  \\
\mbox{of} & \mbox{equations} \nonumber \\
\mbox{which } & \mbox{I cannot suppress} \nonumber \\
\mbox{long } &   \mbox{list}  \\
\mbox{of} & \mbox{equations} \nonumber \\
\mbox{which } & \mbox{I cannot suppress} \nonumber \\
\mbox{long } &   \mbox{list}  \\
\mbox{of} & \mbox{equations} \nonumber \\
\mbox{which } & \mbox{I cannot suppress} \nonumber \\
\mbox{long } &   \mbox{list}  \\
\mbox{of} & \mbox{equations} \nonumber \\
\mbox{which } & \mbox{I cannot suppress} \nonumber \\
\mbox{long } &   \mbox{list}  \\
\mbox{of} & \mbox{equations} \nonumber \\
\mbox{which } & \mbox{I cannot suppress} \nonumber \\
\mbox{long } &   \mbox{list}  \\
\mbox{of} & \mbox{equations} \nonumber \\
\mbox{which } & \mbox{I cannot suppress} \nonumber \\
\mbox{long } &   \mbox{list}  \\
\mbox{of} & \mbox{equations} \nonumber \\
\mbox{which } & \mbox{I cannot suppress} \nonumber \\
\mbox{long } &   \mbox{list}  \\
\mbox{of} & \mbox{equations} \nonumber \\
\mbox{which } & \mbox{I cannot suppress} \nonumber 
\end{align} 
\begin{align}
\mbox{new block with a} &   \mbox{list}  \\
\mbox{of} & \mbox{equations} \nonumber \\
\mbox{which } & \mbox{I cannot suppress} \nonumber \\
\mbox{long} &   \mbox{list}  \\
\mbox{of} & \mbox{equations} \nonumber \\
\mbox{which } & \mbox{I cannot suppress} \nonumber 
\mbox{new block with a} &   \mbox{list}  \\
\mbox{of} & \mbox{equations} \nonumber \\
\mbox{which } & \mbox{I cannot suppress} \nonumber \\
\mbox{long} &   \mbox{list}  \\
\mbox{of} & \mbox{equations} \nonumber \\
\mbox{which } & \mbox{I cannot suppress} \nonumber 
\mbox{new block with a} &   \mbox{list}  \\
\mbox{of} & \mbox{equations} \nonumber \\
\mbox{which } & \mbox{I cannot suppress} \nonumber \\
\mbox{long} &   \mbox{list}  \\
\mbox{of} & \mbox{equations} \nonumber \\
\mbox{which } & \mbox{I cannot suppress} \nonumber 
\end{align} 
\end{subequations}   

\end{document}

marked as duplicate by egreg align Apr 18 '17 at 8:34

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  • 2
    Does \allowdisplaybreaks in your preamble work? – Troy Apr 18 '17 at 7:45
  • subequations has nothing to do with the problem, which would be the same without it. – egreg Apr 18 '17 at 8:25
2

It's a simple fix using the \allowdisplaybreaks command placed in the preamble of your document.

Note that this command can't be used in split, aligned, gathered, and alignedat environments. See here for more information.

\documentclass[11.5pt,a4paper ]{amsart}
\usepackage{lipsum} 
\usepackage{latexsym,amssymb,enumerate}
\usepackage[english]{babel}

\allowdisplaybreaks % <----------

\begin{document} 
...
\end{document}

enter image description here

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