% alleqno.sty -- LaTeX style file to make displayed equations numbered
%                by default.
%
% This document style option makes all displayed equations numbered by
% default.  In particular, it defines things so that \[, \], \[[, and
% \]] may be used as follows:
%
%       \[  ...  \]     ==>     \begin{equation} ... \end{equation}
%       \[[ ... \]]     ==>     \begin{eqnarray} ... \end{eqnarray}
%
% These new commands are short, and they stand out clearly from the
% surrounding text on a terminal screen.
%
% Note that \begin{displaymath} ... \end{displaymath} should *not* be
% used with this style file -- use \[ ... \] instead.  To override the
% default and get an unnumbered displayed equation, use a one-line
% \begin{eqnarray} ... \end{eqnarray}.
%
% - Jonathan Thornburg, 25/Sept/88
%
%   Dept of Geophysics & Astronomy               thornburg@mtsg.ubc.ca
%   The University of British Columbia         userbkis@ubcmtsg.bitnet
%   Vancouver     BC     V6T 1W5          userbkis%ubc@um.cc.umich.edu
%   Canada                         ubc-vision!ubcmtsg.bitnet!thornburg
%
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%
% Thanks to Donald Arseneau for help with the following macro.
\def\mygobbletoken{\let\myjunktoken= }%%%
%
\def\[{\futurelet\mydisplayselect\mydisplay}%%%
\def\mydisplay{%%%
    \if\mydisplayselect[%%%
        \begin{eqnarray}\let\mynextcommand=\mygobbletoken%%%
    \else%%%
        \begin{equation}\let\mynextcommand=\relax%%%
    \fi%%%
    \mynextcommand
}%%%
%
\def\]{\futurelet\mydisplayselect\myenddisplay}%%%
\def\myenddisplay{%%%
    \if\mydisplayselect]%%%
        \end{eqnarray}\let\mynextcommand=\mygobbletoken%%%
    \else%%%
        \end{equation}\let\mynextcommand=\relax%%%
    \fi%%%
    \mynextcommand
}%%%