Whenever you have two or more consecutive lines of displaymath, you should seriously consider using the equation-grouping environments of the amsmath
package. The basic equation-grouping environments of this package are gather
, best if each line is a separate entity not particularly related to those that come before or after, and align
, designed to let you align consecutive equations on some location, frequently (but not necessarily) an equal-sign. A line break between equations is created by the \\
command. There are both numbered and unnumbered versions of these environments -- the latter are created by appending an asterisk to the environment name, e.g., gather*
and align*
. The following modified form of your MWE has consistent (and tight) spacing between the equations.
\documentclass{article}
\usepackage{amsmath}
\begin{document}
\begin{gather*}
(a,b,c,d,e,f,g,h)\\
(a,b,c,d,e,f,g,h)\\
(a,b,c,d,e,f,g,h)
\end{gather*}
\end{document}
The amsmath package provides additional equation-grouping environments besides the two I've just mentioned, as well as many other commands that are very useful if you need to typeset math-related stuff. Its main user guide is the file amsldoc.pdf.
amsmath
package gives you even vertical spacing. However, consecutive displays should be avoided. Agather
environment (fromamsmath
) could be used instead.