Page breaks allowed between \subsection and a running heading

[dpthurst]

Brief outline of the bug

The amsart package will allow a page break after a \subsection heading, if the heading is immediately followed by a theorem environment. (Recall the \subsection is an inline heading, so without a theorem environment or equivalent there is no way to have a page break here.)

(This is separate from the earlier bug about page breaks after a \section heading: https://github.com/latex3/latex2e/issues/81)

Minimal example showing the bug

\RequirePackage{latexbug}
\documentclass{amsart}

\newtheorem{definition}{Definition}

\begin{document}
aaa\\aaa\\aaa\\aaa\\aaa\\aaa\\aaa\\aaa\\aaa\\aaa\\aaa\\aaa\\aaa\\aaa\\aaa\\aaa\\aaa\\aaa\\aaa\\aaa\\aaa\\aaa\\aaa\\aaa\\aaa\\aaa\\aaa\\aaa\\aaa\\aaa\\aaa\\aaa\\aaa\\aaa\\aaa\\aaa\\aaa\\aaa\\aaa\\aaa\\aaa\\aaa\\aaa\\aaa\\
  \section{Conformal Setting}

  \subsection{Riemann surfaces}

\begin{definition}
  A Riemann surface is \dots
\end{definition}

\end{document}

Log file (required) and possibly PDF file

t.log t.pdf !! Use drag-and-drop (remember: .log file is required) !!

[u-fischer]

A similar effect can be seen with the standard class and e.g. \paragraph as inline heading:

\RequirePackage{latexbug}
\documentclass{article}

\newtheorem{definition}{Definition}

\begin{document}
aaa\\aaa\\aaa\\aaa\\aaa\\aaa\\aaa\\aaa\\aaa\\aaa\\aaa\\aaa\\aaa\\aaa\\aaa\\aaa\\aaa\\aaa\\aaa\\aaa\\aaa\\aaa\\aaa\\aaa\\aaa\\aaa\\aaa\\aaa\\aaa\\aaa\\aaa\\aaa\\aaa\\aaa\\aaa\\aaa\\aaa\\aaa\\aaa\\aaa\\
  \section{Conformal Setting}

  \paragraph{Riemann surfaces}

\begin{definition}
  A Riemann surface is \dots
\end{definition}

\end{document}

[car222222]

Any fix for this is probably relevant to the code for fixing #131 also.

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This issue has been automatically marked as stale because it has not had recent activity. It will be closed if no further activity occurs. Thank you for your contributions.

[stale[bot]]

This issue has been automatically marked as stale because it has not had recent activity.

[stale[bot]]

This issue has been automatically marked as stale because it has not had recent activity.