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+%%
+%% This is file `envmath.sty',
+%% generated with the docstrip utility.
+%%
+%% The original source files were:
+%%
+%% envmath.dtx (with options: `package')
+%%
+%% IMPORTANT NOTICE:
+%%
+%% For the copyright see the source file.
+%%
+%% Any modified versions of this file must be renamed
+%% with new filenames distinct from envmath.sty.
+%%
+%% For distribution of the original source see the terms
+%% for copying and modification in the file envmath.dtx.
+%%
+%% This generated file may be distributed as long as the
+%% original source files, as listed above, are part of the
+%% same distribution. (The sources need not necessarily be
+%% in the same archive or directory.)
+%%
+%% + - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - +
+%% | Copyright(C) 1997-2010 by F. Bosisio |
+%% | |
+%% | This program can be redistributed and/or modified under |
+%% | the terms of the LaTeX Project Public License, either |
+%% | version 1.3 of this license or (at your option) any later |
+%% | version. The latest version of this license is in |
+%% | http://www.latex-project.org/lppl.txt |
+%% | and version 1.3 or later is part of all LaTeX distributions |
+%% | version 2005/12/01 or later. |
+%% | |
+%% | This work has the LPPL maintenance status `maintained'. |
+%% | The Current Maintainer of this work is F. Bosisio. |
+%% | |
+%% | This work consists of files envmath.dtx and envmath.html |
+%% | and of the derived files envmath.sty and envmath.pdf. |
+%% | |
+%% | E-mail: fbosisio@bigfoot.com |
+%% | CTAN location: macros/latex/contrib/bosisio/ |
+%% + - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - +
+%%
+%% If you make any improvment, find any bug or have
+%% any suggestion, please let me know about it.
+%%
+\def\FileName{envmath}
+\def\fileversion{2.5}
+\def\filedate{2010/02/10}
+\def\docdate{2005/04/09}
+\def\filedescr{Extended math environments (FB)}
+%%
+\NeedsTeXFormat{LaTeX2e}[1995/12/01]
+\ProvidesPackage{\FileName}[\filedate\space v\fileversion\space\filedescr]
+%%
+\newif\if@Redefine@Equation@
+\DeclareOption{RedefEquation}{\@Redefine@Equation@true}
+\DeclareOption{StdEquation}{\@Redefine@Equation@false}
+%%
+\newif\if@Redefine@Brackets@
+\DeclareOption{RedefBrackets}{\@Redefine@Brackets@true}
+\DeclareOption{StdBrackets}{\@Redefine@Brackets@false}
+%%
+\DeclareOption{Standard}{\@Redefine@Equation@false\@Redefine@Brackets@false}
+%%
+\ExecuteOptions{RedefEquation,RedefBrackets}
+%%
+\ProcessOptions*
+%%
+\newcommand*\StartMath@Err[1]{%
+\ifmmode\PackageError{\FileName}{%
+You can't use environment ``#1'' in math mode}{%
+You probably used ``\string\end{#1}'' without a previous ``\string\begin{#1}''.}%
+\else$$\fi%
+}
+%%
+\AtBeginDocument{%
+\let\@StandardEquation=\equation
+}
+\def\@LabelledEquation[#1]{\@StandardEquation\label{#1}}
+\newenvironment{Equation}{%
+\@ifnextchar[{\@LabelledEquation}{\@StandardEquation}%
+}{%
+\endequation%
+}
+\if@Redefine@Equation@
+ \AtBeginDocument{\let\equation=\Equation}
+\fi
+%%
+\def\Equation@Star[#1]{\StartMath@Err{equation*}}
+\AtBeginDocument{%
+\@namedef{equation*}{\@ifnextchar[{\Equation@Star}{\Equation@Star[]}}%
+\@namedef{endequation*}{$$\global\@ignoretrue}%
+}
+%%
+\let\@ArrayCR=\@arraycr
+\def\@ArrayCR@quadra[#1]{\@ArrayCR[#1]\displaystyle}
+\def\@ArrayCR@star@quadra[#1]{%
+\@ArrayCR[#1]\displaystyle\mbox{\hspace{\SystemStarIndent}}%
+}
+\def\@ArrayCR@star*{%
+\@ifnextchar[{\@ArrayCR@star@quadra}{%
+\@ArrayCR\displaystyle\mbox{\hspace{\SystemStarIndent}}}}%
+\newcommand*{\ARRAY@CR}{\@ifnextchar*{\@ArrayCR@star}{%
+\@ifnextchar[{\@ArrayCR@quadra}{\@ArrayCR\displaystyle}}%
+}
+%%
+\newcommand*\MakeAmper@Active[1]{
+\global\def\@AMPERSAND{#1}%
+\begingroup%
+ \catcode`\~\active \lccode`\~`\&%
+ \lowercase{%
+ \global\expandafter\let
+ \csname ac\string\&\endcsname~%
+ \gdef~{\@AMPERSAND}}%
+\endgroup%
+\global\catcode`\&\active%
+}
+%%
+\newcommand*\MakeAmper@Tab{\global\catcode`\&=4}
+%%
+\newcommand*\OneShot@Amper[2]{%
+\MakeAmper@Active{#1\expandafter\MakeAmper@Tab&#2}%
+}
+%%
+\newlength\MultiLineIndent
+\setlength{\MultiLineIndent}{1.7em}
+%%
+\newlength\MultiLineStarIndent
+\setlength\MultiLineStarIndent{1em}
+%%
+\newcommand*\@MultiLineCR{%
+\@ifnextchar*{\MLineCR@star}{%
+\@ifnextchar[{\MLineCR@quadra}{\@ArrayCR\ML@EveryRow}}%
+}
+\def\MLineCR@star*{%
+\@ifnextchar[{\MLineCR@star@quadra}{%
+\@ArrayCR\ML@EveryRow\hspace{\MultiLineStarIndent}}%
+}
+\def\MLineCR@star@quadra[#1]{%
+\@ArrayCR[#1]%
+\ML@EveryRow%
+\hspace{\MultiLineStarIndent}%
+}
+\def\MLineCR@quadra[#1]{\@ArrayCR[#1]\ML@EveryRow}
+\newcommand*\@MultiLINEcr{%
+\ifnum\catcode`\&=4%
+\global\def\ML@EveryRow{&\displaystyle\mbox{}}%
+\else%
+\MakeAmper@Tab%
+\global\def\ML@EveryRow{\displaystyle\mbox{\hspace{\MultiLineIndent}}}%
+\fi%
+\ML@EveryRow%
+}
+%%
+\newcommand*{\CONTINUE}{%
+\PackageError{\FileName}{%
+Command ``\string\CONTINUE'' is obsolete: use ``\string\\*'' instead}{%
+You'd better correct your input file as stated above,\MessageBreak%
+but if you press ENTER everything will work for the moment.}%
+\MLineCR@star*%
+}
+%%
+\newcommand*\Start@MultiLine{%
+\@ifnextchar[{\Start@MultiLine@quadra}{\Start@MultiLine@no}%
+}
+%%
+\def\Start@MultiLine@quadra[#1]{\@LABEL{#1}\Start@MultiLine@no}
+%%
+\newcommand*\Start@MultiLine@no{%
+\OneShot@Amper{}{\displaystyle}%
+\let\@arraycr=\@MultiLineCR%
+\let\ML@EveryRow=\@MultiLINEcr%
+\begin{array}{l@{\hspace{0.3em}}l}%
+\displaystyle%
+}
+%%
+\newcommand*\Stop@MultiLine{%
+\end{array}%
+\let\@arraycr=\@ArrayCR%
+\MakeAmper@Tab% % For the case no ``\\'' is used
+}
+%%
+\newenvironment{MultiLine}{%
+\let\@LABEL=\label%
+\@StandardEquation%
+\Start@MultiLine%
+}{%
+\Stop@MultiLine%
+\endequation%
+\global\@ignoretrue%
+}
+%%
+\@namedef{MultiLine*}{\ifmmode\Not@MathErr{MultiLine*}\else$$\fi%
+\def\@LABEL##1{}%
+\Start@MultiLine%
+}
+\@namedef{endMultiLine*}{\Stop@MultiLine$$\global\@ignoretrue}
+%%
+\newcommand*\@System@Def{%
+\let\@arraycr=\ARRAY@CR%
+\left\lbrace%
+\begin{array}{l@{\qquad}l@{}}%
+\displaystyle%
+}
+\def\Label@System[#1]{\@StandardEquation\label{#1}\@System@Def}
+\newenvironment{System}{%
+\@ifnextchar[{\Label@System}{\@StandardEquation\@System@Def}%
+}{%
+\end{array}%
+\right.%
+\endequation%
+\let\@arraycr=\@ArrayCR%
+\global\@ignoretrue%
+}
+%%
+\def\System@Star[#1]{\StartMath@Err{System*}\@System@Def}
+\@namedef{System*}{\@ifnextchar[{\System@Star}{\System@Star[]}}
+\@namedef{endSystem*}{\end{array}\right. $$\let\@arraycr=\@ArrayCR \global\@ignoretrue}
+%%
+\newenvironment{EQNarray}{%
+\PackageError{\FileName}{Environment ``EQNarray'' is obsolete}{%
+Use the ``equationarry'' environment from the ``eqnarray'' package instead!}%
+\eqnarray%
+}{%
+\endeqnarray%
+}
+%%
+\newlength\SystemColSep
+\setlength\SystemColSep{2em}
+%%
+\newlength\SystemBraceSep
+\setlength\SystemBraceSep{3pt}
+%%
+\newlength\SystemStarIndent
+\setlength\SystemStarIndent{2em}
+%%
+\newsavebox{\SysRow@Box}
+\newlength\ColOne@Width
+\newlength\ColTwo@Width
+\newlength\SysCol@TmpWidth
+%%
+\newcommand*\Start@EqSysRow{%
+\OneShot@Amper{%
+$\end{lrbox}%
+\settowidth\SysCol@TmpWidth{\usebox{\SysRow@Box}}%
+\ifnum\SysCol@TmpWidth>\ColOne@Width\global\setlength\ColOne@Width\SysCol@TmpWidth\fi%
+\usebox{\SysRow@Box}%
+}{%
+\begin{lrbox}{\SysRow@Box}$\displaystyle%
+}%
+\begin{lrbox}{\SysRow@Box}$\displaystyle%
+}
+%%
+\newcommand*\Stop@EqSysRow{%
+$\end{lrbox}%
+\settowidth\SysCol@TmpWidth{\usebox{\SysRow@Box}}%
+\ifnum\catcode`\&=4%
+\ifnum\SysCol@TmpWidth>\ColTwo@Width\global\setlength\ColTwo@Width\SysCol@TmpWidth\fi%
+\else%
+\MakeAmper@Tab%
+\ifnum\SysCol@TmpWidth>\ColOne@Width\global\setlength\ColOne@Width\SysCol@TmpWidth\fi%
+\fi%
+\usebox{\SysRow@Box}%
+}
+%%
+\def\@EqSystCR@star@quadra[#1]{%
+\Sys@@eqncr%
+\noalign{\penalty\@eqpen\vskip #1\relax}%
+\Start@EqSysRow%
+\mbox{\hspace{\SystemStarIndent}}%
+}
+%%
+\def\@EqSystCR@star*{%
+\global\@eqnswfalse%
+\@ifnextchar[{\@EqSystCR@star@quadra}{%
+\Sys@@eqncr\Start@EqSysRow\mbox{\hspace{\SystemStarIndent}}}%
+}
+%%
+\def\@EqSystCR@quadra[#1]{%
+\Sys@@eqncr%
+\noalign{\penalty\@eqpen\vskip #1\relax}%
+\Start@EqSysRow%
+}
+%%
+\newcommand*\EqSyst@CR{%
+\Stop@EqSysRow%
+\@ifnextchar*{\@EqSystCR@star}{%
+\@ifnextchar[{\@EqSystCR@quadra}{\Sys@@eqncr\Start@EqSysRow}}%
+}
+%%
+\let\Label@EqSystem=\relax
+%%
+\newcommand*\Sys@@eqncr{%
+\let\reserved@a\relax%
+\ifcase\@eqcnt\def\reserved@a{& &}% %% \@eqcnt = 0
+\or\def\reserved@a{&}% %% \@eqcnt = 1
+\else% %% \@eqcnt > 1
+\let\reserved@a\@empty%
+\PackageError{\FileName}{Too many columns in EqSystem environment}{%
+You can use at most one ``&'' in each row of an ``EqSystem'' environment.}%
+\fi%
+\reserved@a%
+\if@eqnsw\Label@EqSystem\@eqnnum\stepcounter{equation}\fi%
+\global\@eqnswtrue%
+\global\@eqcnt\z@%
+\cr%
+}
+%%
+\newenvironment{EqSystem}[1][\relax]{%
+\setcounter{EqSys@counter}{0}%
+\def\Label@EqSystem{#1}%
+\def\@tempa{\relax}%
+\ifx\Label@EqSystem\@tempa\else%
+\def\Label@EqSystem{\stepcounter{EqSys@counter}\label{#1:\alph{EqSys@counter}}}%
+\fi%
+\BEGIN@EqSystem%
+}{%
+\Stop@EqSysRow%
+%%%-------------------- \endEQNarr@y ----------------------%
+\Sys@@eqncr%
+\egroup%
+\global\advance\c@equation\m@ne%
+$$%
+%%%--------------------------------------------------------%
+\vspace*{-\belowdisplayskip}%
+\end{minipage}%
+\advance\ColTwo@Width\ColOne@Width%
+\advance\ColTwo@Width\SystemColSep%
+\setlength\SysCol@TmpWidth\displaywidth%
+\global\advance\SysCol@TmpWidth-\ColTwo@Width%
+\global\divide\SysCol@TmpWidth\tw@%
+\global\advance\SysCol@TmpWidth\ColTwo@Width%
+\global\advance\SysCol@TmpWidth\SystemBraceSep% %% Space around left-brace
+\global\advance\SysCol@TmpWidth 1em% %% ~= Left-brace size
+\hspace{-\SysCol@TmpWidth}%
+\right\lbrace%
+\advance\SysCol@TmpWidth-1em% %% ~= Left-brace size
+\hspace*{\SysCol@TmpWidth}%
+$$\global\@ignoretrue%
+}
+%%
+\newcommand*\BEGIN@EqSystem{%
+\setlength\ColOne@Width\z@%
+\setlength\ColTwo@Width\z@%
+$$\left.%
+\begin{minipage}{\displaywidth}%
+\vspace*{-\abovedisplayskip}%
+%%%-------------------------- \EQNarr@y -------------------%
+\stepcounter{equation}%
+\let\@currentlabel=\theequation%
+\global\@eqnswtrue%
+\global\@eqcnt\z@%
+\tabskip\@centering%
+\let\\=\EqSyst@CR%
+$$\halign to \displaywidth\bgroup%
+\tabskip\z@{##}\hfil%
+&\global\@eqcnt\@ne%
+\hspace{\SystemColSep}{##}\hfil%
+\tabskip\@centering%
+&\llap{##}\tabskip\z@\cr%
+%%%--------------------------------------------------------%
+\Start@EqSysRow%
+}
+%%
+\newcounter{EqSys@counter}
+%%
+\newcommand*\EqSystem@Star[1][\relax]{%
+\stepcounter{equation}%
+\setcounter{EqSys@counter}{\value{equation}}%
+\def\Label@EqSystem{#1}%
+\def\@tempa{\relax}%
+\ifx\Label@EqSystem\@tempa\else%
+\let\@currentlabel=\theequation%
+\label{#1}%
+\def\Label@EqSystem{\label{#1:\alph{equation}}}%
+\fi%
+\let\INNER@theEQUATION=\theequation%
+\xdef\inner@theEQUATION{\theequation}%
+\def\theequation{\inner@theEQUATION\alph{equation}}%
+\setcounter{equation}{0}%
+\BEGIN@EqSystem%
+}
+%%
+\@namedef{EqSystem*}{\EqSystem@Star}
+%%
+\@namedef{endEqSystem*}{%
+\endEqSystem%
+\setcounter{equation}{\value{EqSys@counter}}%
+\global\let\theequation=\INNER@theEQUATION%
+}
+\if@Redefine@Brackets@
+ \AtBeginDocument{%
+ \let\math=\(
+ \let\endmath=\)
+ \let\displaymath=\[
+ \let\enddisplaymath=\]
+ \renewcommand*{\(}{\left(}%
+ \renewcommand*{\)}{\right)}%
+ \renewcommand*{\[}{\left[}%
+ \renewcommand*{\]}{\right]}%
+ \renewcommand*{\{}{\left\lbrace}%
+ \renewcommand*{\}}{\right\rbrace}%
+ }
+\fi
+\endinput
+%%
+%% End of file `envmath.sty'.