2

When using both hyperref and fleqn, I am getting some extra vertical space above numbered equations. This issue is I believe a known bug in hyperref and has already been discussed at

but I have not been able to successfully apply the workarounds given there to my specific problem, and that is what I could use some help with. Here's a MnWE:

\documentclass[fleqn]{report}
\usepackage{hyperref}
\usepackage{amsmath}

\newcommand{\question}[4]{
    \par \noindent \textbf{\ignorespaces#2}
    \nopagebreak[2]
    \vspace{10pt}
    \par \noindent \ignorespaces#3 \textit{\ignorespaces#4}
    \vspace{20pt}
}

\begin{document}

\question{default}{
  A question whose answer is an equation*.
}{
  \begin{equation*} \frac{x}{(1-x)^2} \end{equation*}
}{}

\question{default}{
  A question whose answer is an equation.
}{
  \begin{equation} \frac{x}{(1-x)^2} \end{equation}
}{}


\question{default}{
  A question whose answer is plain old text.
}{
  The answer.
}{}

\end{document}

MWE output

Some Background

I have a collection of notes in question-answer format. I like to review them by covering the (printed) notes with a sheet of paper and moving that paper down until I can see only the question. At this point I try to remember the answer, and I once I think I've got it, I move the sheet down further to reveal the answer.

Until recently the tex file containing this was something of a mess, so I decided to try writing the macro you see above. If my macro is completely wrong, let me know and I'll open a separate question on how to do that properly.

Community
  • 1
user471651
  • 71
  • If you intend to always include some sort of display environment in #3, you can set \aboveskipayskip and \belowdisplayskip (temporarily) to the desired values. If not, you should set them to 0pt. – John Kormylo Jul 11 '16 at 13:10

1 Answers1

2

You should never have a paragraph break before a displayed equation, TeX always does the wrong thing in such a situation. Here I removed the spurious par, also added some missing % I left in the \noindent although in almost all cases that shouldn't be used in latex,

enter image description here

\documentclass[fleqn]{report}
\usepackage{hyperref}
\usepackage{amsmath}

\newcommand{\question}[4]{%
    \par \noindent\nopagebreak[2]\textbf{\ignorespaces#2}%
    \ignorespaces#3 \textit{\ignorespaces#4}%
    \vspace{20pt}%
}

\begin{document}

\question{default}{
  My question
}{
  \begin{equation*} \frac{x}{(1-x)^2} \end{equation*}
}{}

\question{default}{
  My question
}{
  \begin{equation} \frac{x}{(1-x)^2} \end{equation}
}{}

\end{document}
David Carlisle
  • 757,742
  • Thank you. Unfortunately the third argument is sometimes an equation but usually not, and I want the third argument to always go on its own line. I'll go back and describe the bigger picture in my question. – user471651 Jul 11 '16 at 17:16
  • What is the purpose of the %'s? I know that double newlines will start a new paragraph, but I thought a single newline is basically the same as a space. – user471651 Jul 11 '16 at 17:41
  • @user471651 exactly and you don't want spaces there http://tex.stackexchange.com/questions/7453/what-is-the-use-of-percent-signs-at-the-end-of-lines – David Carlisle Jul 12 '16 at 08:57