[Tex/LaTex] Is it possible to pagebreak aligned equations

equationspage-breaking

The report I'm writting features a lot of long, multiple lines equations. To reduce visual polution I've been using an aligned environment nested inside equation. This way (unlike just using an align environment) I get only a single label for all the lines.

The problem is that so many long equations often need to be broken into two pages, otherwise I get lots of blank vertical space in the document. However the aligned environment does not allow the \displaybreak command.

Is there an alternative way to achieve a pagebreak inside an aligned equation?

Here's a sample ofthe equations I'm using

\begin{equation}
    \begin{aligned}
    ...\\
    ...\\  %I need to pagebreak here
    ...\\
\end{aligned}\end{equation}

Best Answer

In relation to the comments I want to answer this question.

First of all to allow page breaks inside equations you have to set the command \allowdisplaybreaks. Without setting this one no page break occurs.

Using a simple align-environment. Of course as @DavidCarlisle suggested you can use the star variant to suppress the numbering and set a specific tag by \tag.

The environment split can't handle page breaks.

\documentclass{article}
\usepackage{amsmath}
\usepackage{kantlipsum}
\usepackage{showframe}
\allowdisplaybreaks

\begin{document}
\kant[1-3]
\begin{align*}
    a\\
    b\\
    c\\
    d\\
    e\tag{\stepcounter{equation}\theequation}\\
    f\\
    g\\
    h\\
    i
\end{align*}
\end{document}
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