From: Troy Henderson <thenders@gmail.com>
To: mailing list for ConTeXt users <ntg-context@ntg.nl>
Subject: \abovedisplayskip and \belowdisplayskip
Date: Thu, 6 Sep 2012 21:54:31 -0500 [thread overview]
Message-ID: <CAFP+xFKxib26oZcSkbZAi2Wn6kwEfs1gd6yS8i2rwX6uNcjUzw@mail.gmail.com> (raw)
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It is my understanding that \abovedisplayskip and \belowdisplayskip should
adjust how much (rubber) spacing that is allowed between display math
formulas. I have attached a ConTeXt file (bug.tex) that seems to indicate
that setting these skips does not affect this (rubber) spacing. I have
also translated this ConTeXt file line-by-line to a LaTeX file (bug.ltx)
and attached it.
Both files produce a PDF (using `context bug.tex` and `pdflatex bug.ltx`)
in which the spacing between the formula changes from page 1 to page 2
simply by adding the final formula. However, by changing \adjustdisplay{0}
to \adjustdisplay{1}, the LaTeX file produces a 3 page document where the
spacing between formula does not change (as expected) on the first two
pages and thus requires a third page to typeset the final formula.
However, making this same adjustment in the ConTeXt file does not seem to
affect the output.
I would appreciate any thoughts as to why this is happening, and I would
equally appreciate a solution to keeping the spacing the same in the
ConTeXt file and thus bumping that last formula to a third page.
Troy Henderson
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\documentclass{minimal}
\usepackage[paperwidth=600pt,paperheight=450pt]{geometry}
\def\adjustdisplay#1 {
\ifnum#1>0
\newdimen\mydimen
\mydimen\abovedisplayskip \abovedisplayskip\mydimen
\mydimen\belowdisplayskip \belowdisplayskip\mydimen
\fi
}
\def\foo{
\vskip0.5ex
\[\frac{x}{1} = \frac{1}{x-1}\]
\vskip0.5ex
\[x(x-1)=1\]
\vskip0.5ex
\[x^2-x=1\]
\vskip0.5ex
\[x^2-x-1=0\]
\vskip0.5ex
\[x=\frac{1+\sqrt{5}}{2},\frac{1-\sqrt{5}}{2}\]
}
\begin{document}
\pagestyle{empty}
\fontsize{20}{24}\selectfont
\adjustdisplay{0}
\foo
\clearpage
\foo\vskip0.5ex
\[\phi = \frac{x}{1} = x =\frac{1+\sqrt{5}}{2} \approx 1.618\]
\end{document}
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next reply other threads:[~2012-09-07 2:54 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-09-07 2:54 Troy Henderson [this message]
2012-09-07 3:13 ` Aditya Mahajan
2012-09-07 4:17 ` Troy Henderson
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