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When I try to add package resizegather, extra vertical space is added into mdframed equations. By gradually truncating the code, I found that commenting package resizegather would fix the problem. See figure below. But I have no idea, what is behind that. I found similar issues described in tasks:

but it didn't help

MNWE:

\documentclass{scrbook}

\usepackage{mdframed}
\usepackage{amsmath}
\usepackage{resizegather}

\usepackage{blindtext}


\begin{document}
  \chapter{My title test 7}
    \blindtext

    \begin{mdframed}
      \begin{equation}\label{mai:eq1}
        \boxed{\int f(x) dx = F(x) + c}
      \end{equation}
    \end{mdframed}
    \blindtext

\end{document}

using of the package resizegather

JardaFait
  • 3,922

1 Answers1

1

You can solve the problem with nccmath and its \useshortskip command:

\documentclass{scrbook}

\usepackage{mdframed}
\usepackage{amsmath, nccmath}
\usepackage{resizegather}
\usepackage{blindtext}


\begin{document}
  \chapter{My title test 7}
    \blindtext
    \begin{mdframed}\useshortskip
      \begin{equation}\label{mai:eq1}
        \boxed{\int f(x) dx = F(x) + c}
      \end{equation}
    \end{mdframed}
    \blindtext
\end{document}

enter image description here

Bernard
  • 271,350
  • Thank you so much for the solution. Can you explain to me what's going on there? – JardaFait Sep 30 '20 at 08:18
  • 1
    I really don't know why mdframed behaves this way. For the vertical spacing of displayed equations, two kind of rubber lengths can be used: \abovedisplayskip and \abovedisplayshortskip, depending on the length of the last line of text above the equation. The nccmath command, as you can guess, forces the use of the short version. – Bernard Sep 30 '20 at 08:26