trunk/Master/texmf-dist/source/latex/leftidx

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+% \iffalse meta comment
+% File: leftidx.dtx Copyright (C) 2000, 2001, 2003 Harald Harders
+% \fi
+%
+% \iffalse
+%
+%<*package>
+\def\fileversion{1.03}
+\def\filedate{2003/09/24}
+%</package>
+%<*driver>
+\documentclass{ltxdoc}
+\usepackage[latin1]{inputenc}
+\IfFileExists{leftidx.sty}{\usepackage{leftidx}
+ \let\leftidxSTYfound\active}{\GenericWarning{leftidx.dtx}{Package
+ file leftidx.sty not found (Documentation will be messed up!^^J^^A
+ Generate leftidx.sty by (La)TeXing leftidx.ins, process
+ leftidx.dtx again)^^J}\stop}
+\usepackage{longtable}
+\title{The \texttt{leftidx} package\thanks{This file has version 
+    \fileversion\ last revised \filedate.}}
+\author{Harald Harders\\\texttt{h.harders@tu-bs.de}}
+\date{File Date \filedate, Printed \today}
+\newlength{\tempdima}%
+\makeatletter
+\renewenvironment{table}[1][]{%
+  \@float{table}[#1]%
+  \centering%
+  \setlength{\tempdima}{\abovecaptionskip}%
+  \setlength{\abovecaptionskip}{\belowcaptionskip}%
+  \setlength{\belowcaptionskip}{\tempdima}%
+  }{%
+\end@float
+}
+\makeatother
+\EnableCrossrefs
+\CodelineIndex
+\DoNotIndex{\def,\edef,\let,\newcommand,\newenvironment,\newcounter}
+\DoNotIndex{\setcounter,\space,\if,\else,\fi,\empty,\@empty,\ifx,\fi}
+\DoNotIndex{\ifnum,\fi,\expandafter}
+\CodelineNumbered
+\RecordChanges
+\CheckSum{14}
+\begin{document}
+ \DocInput{leftidx.dtx}
+\end{document}
+%</driver>
+% \fi
+%
+% \changes{1.03}{2003/09/24}{Reimplementation with dtx format with
+%   English documentation}%
+%
+% \maketitle
+% \begin{abstract}
+% \noindent
+% This package enables left subscripts and superscripts in math mode.
+% These subscripts and superscripts are automatically raised for better
+% fitting to the symbol they belong to.
+% \end{abstract}
+%
+% \tableofcontents
+%
+% \section*{Copyright}
+% Copyright 2000, 2001, 2003 Harald Harders.
+%
+% This program can be redistributed and/or modified under the terms
+% of the LaTeX Project Public License Distributed from CTAN
+% archives in directory macros/latex/base/lppl.txt; either
+% version 1 of the License, or any later version.
+%
+% \section{Introduction}
+% 
+% In mathematical equations, it is sometimes necessary to use indices
+% (subscript or superscript) that are positioned at the left side of a
+% symbol. 
+% In tensor mathematics, for instance, some notations use a transponed
+% sign at the left side of the symbol:
+% \begin{eqnarray*}
+% \leftidx{^\mathrm{t}}{\left(A_{ij}\right)}{} &=&
+% \left(A_{ji}\right)
+% \end{eqnarray*}
+% 
+% For symbols with a normal character height, this can be reached by
+% simply put the indices without an own symbol:
+% 
+% \noindent
+% \begin{minipage}[c]{0.79\linewidth}
+% \leavevmode\begin{verbatim}
+%${_1^2}a_3^4$
+% \end{verbatim}
+% \end{minipage}
+% \begin{minipage}[c]{0.19\linewidth}
+% ${_1^2}a_3^4$
+% \end{minipage}
+% 
+% \noindent
+% Is the symbol larger, this leads to unsatisfactory results:
+% 
+% \noindent
+% \begin{minipage}[c]{0.79\linewidth}
+% \leavevmode\begin{verbatim}
+%${_1^2}\left(\frac{1}{b}\right)_3^4$
+% \end{verbatim}
+% \end{minipage}
+% \begin{minipage}[c]{0.19\linewidth}
+% ${_1^2}\left(\frac{1}{b}\right)_3^4$
+% \end{minipage}
+% 
+% \noindent
+% A better output can be reached by using the package |leftidx.sty|:
+% 
+% \noindent
+% \begin{minipage}[c]{0.79\linewidth}
+% \leavevmode\begin{verbatim}
+%$\leftidx{_1^2}{\left(\frac{1}{b}\right)}{_3^4}$
+% \end{verbatim}
+% \end{minipage}
+% \begin{minipage}[c]{0.19\linewidth}
+%$\leftidx{_1^2}{\left(\frac{1}{b}\right)}{_3^4}$
+% \end{minipage}
+% 
+% \section{Usage of the package}
+% 
+% Two commands are provided by the package.
+% 
+% \DescribeMacro{\leftidx}%
+% The \cs{leftidx} command has the syntax
+% \cs{leftidx}\marg{left indices}\marg{symbol}\marg{right indices}.
+% This command typesets the symbol \meta{symbol} with indices on the
+% left and on the right side.
+% Example:
+%
+% \noindent 
+% \begin{minipage}[c]{0.79\linewidth}
+% \leavevmode\begin{verbatim}
+%$\leftidx{_1^2}{\left(\frac{1}{b}\right)}{_3^4}$
+% \end{verbatim}
+% \end{minipage}
+% \begin{minipage}[c]{0.19\linewidth}
+% $\leftidx{_1^2}{\left(\frac{1}{b}\right)}{_3^4}$
+% \end{minipage}
+% 
+% \noindent
+% You may omit left or right indices by using empty arguments.
+%
+% The next example shows the same in the different mathematical
+% styles:
+% \def\asdf{\leftidx{_1^2}{\left(\frac1b\right)}{_3^4}}%
+% \begin{displaymath}
+% \displaystyle\asdf\quad\textstyle\asdf\quad
+% \scriptstyle\asdf\quad\scriptscriptstyle\asdf
+% \end{displaymath}
+% As you can see from the left indices, the horizontal spacing of the
+% left indices is not perfect.
+% You have to adjust them by yourself.
+% 
+% \DescribeMacro{\ltrans}%
+% The \cs{ltrans}\marg{symbol} command typesets a small upright ``t''
+% as transponed sign on the left side of \meta{symbol}.
+% Example:
+% 
+% \noindent
+% \begin{minipage}[c]{0.79\linewidth}
+% \leavevmode\begin{verbatim}
+%$\ltrans{\underline{\underline{J}}}=
+%\underline{\underline{J}}^{-1}$
+% \end{verbatim}
+% \end{minipage}
+% \begin{minipage}[c]{0.19\linewidth}
+% $\ltrans{\underline{\underline{J}}}=\underline{\underline{J}}^{-1}$
+% \end{minipage}
+%
+%
+% \StopEventually{\PrintChanges \PrintIndex}
+%
+% \section{The implementation}
+% \iffalse
+%<*package>
+% \fi
+% Heading of the package:
+%    \begin{macrocode}
+\NeedsTeXFormat{LaTeX2e}[1995/12/01]
+\ProvidesPackage{leftidx}[\filedate\space v\fileversion\space Left indices]
+%    \end{macrocode}
+% \begin{macro}{\leftidx}
+% \changes{1.03}{2003/09/24}{Implementation simplyfied}%
+% Command for left indices.
+% The braces around the \cs{vphantom} are necessary to really raise
+% the left indices.
+%    \begin{macrocode}
+\newcommand\leftidx[3]{%
+  {\vphantom{#2}}#1#2#3%
+}
+%    \end{macrocode}
+% \end{macro}
+% \begin{macro}{\ltrans}
+% Left positioned transponed sign.
+%    \begin{macrocode}
+\newcommand{\ltrans}[1]{\leftidx{^\mathrm{t}}{\!#1}{}}
+%    \end{macrocode}
+% \end{macro}
+%
+% \iffalse
+%</package>
+% \fi
+% \Finale
+