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+% \iffalse meta-comment
+%
+% File: centernot.dtx
+% Version: 2016/05/16 v1.4
+% Info: Centers the not symbol horizontally
+%
+% Copyright (C) 2006, 2007, 2010, 2011 by
+% Heiko Oberdiek <heiko.oberdiek at googlemail.com>
+% 2016
+% https://github.com/ho-tex/oberdiek/issues
+%
+% This work may be distributed and/or modified under the
+% conditions of the LaTeX Project Public License, either
+% version 1.3c of this license or (at your option) any later
+% version. This version of this license is in
+% http://www.latex-project.org/lppl/lppl-1-3c.txt
+% and 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 distributions of
+% LaTeX version 2005/12/01 or later.
+%
+% This work has the LPPL maintenance status "maintained".
+%
+% This Current Maintainer of this work is Heiko Oberdiek.
+%
+% This work consists of the main source file centernot.dtx
+% and the derived files
+% centernot.sty, centernot.pdf, centernot.ins, centernot.drv.
+%
+% Distribution:
+% CTAN:macros/latex/contrib/oberdiek/centernot.dtx
+% CTAN:macros/latex/contrib/oberdiek/centernot.pdf
+%
+% Unpacking:
+% (a) If centernot.ins is present:
+% tex centernot.ins
+% (b) Without centernot.ins:
+% tex centernot.dtx
+% (c) If you insist on using LaTeX
+% latex \let\install=y\input{centernot.dtx}
+% (quote the arguments according to the demands of your shell)
+%
+% Documentation:
+% (a) If centernot.drv is present:
+% latex centernot.drv
+% (b) Without centernot.drv:
+% latex centernot.dtx; ...
+% The class ltxdoc loads the configuration file ltxdoc.cfg
+% if available. Here you can specify further options, e.g.
+% use A4 as paper format:
+% \PassOptionsToClass{a4paper}{article}
+%
+% Programm calls to get the documentation (example):
+% pdflatex centernot.dtx
+% makeindex -s gind.ist centernot.idx
+% pdflatex centernot.dtx
+% makeindex -s gind.ist centernot.idx
+% pdflatex centernot.dtx
+%
+% Installation:
+% TDS:tex/latex/oberdiek/centernot.sty
+% TDS:doc/latex/oberdiek/centernot.pdf
+% TDS:source/latex/oberdiek/centernot.dtx
+%
+%<*ignore>
+\begingroup
+ \catcode123=1 %
+ \catcode125=2 %
+ \def\x{LaTeX2e}%
+\expandafter\endgroup
+\ifcase 0\ifx\install y1\fi\expandafter
+ \ifx\csname processbatchFile\endcsname\relax\else1\fi
+ \ifx\fmtname\x\else 1\fi\relax
+\else\csname fi\endcsname
+%</ignore>
+%<*install>
+\input docstrip.tex
+\Msg{************************************************************************}
+\Msg{* Installation}
+\Msg{* Package: centernot 2016/05/16 v1.4 Centers the not symbol horizontally (HO)}
+\Msg{************************************************************************}
+
+\keepsilent
+\askforoverwritefalse
+
+\let\MetaPrefix\relax
+\preamble
+
+This is a generated file.
+
+Project: centernot
+Version: 2016/05/16 v1.4
+
+Copyright (C) 2006, 2007, 2010, 2011 by
+ Heiko Oberdiek <heiko.oberdiek at googlemail.com>
+
+This work may be distributed and/or modified under the
+conditions of the LaTeX Project Public License, either
+version 1.3c of this license or (at your option) any later
+version. This version of this license is in
+ http://www.latex-project.org/lppl/lppl-1-3c.txt
+and 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 distributions of
+LaTeX version 2005/12/01 or later.
+
+This work has the LPPL maintenance status "maintained".
+
+This Current Maintainer of this work is Heiko Oberdiek.
+
+This work consists of the main source file centernot.dtx
+and the derived files
+ centernot.sty, centernot.pdf, centernot.ins, centernot.drv.
+
+\endpreamble
+\let\MetaPrefix\DoubleperCent
+
+\generate{%
+ \file{centernot.ins}{\from{centernot.dtx}{install}}%
+ \file{centernot.drv}{\from{centernot.dtx}{driver}}%
+ \usedir{tex/latex/oberdiek}%
+ \file{centernot.sty}{\from{centernot.dtx}{package}}%
+ \nopreamble
+ \nopostamble
+% \usedir{source/latex/oberdiek/catalogue}%
+% \file{centernot.xml}{\from{centernot.dtx}{catalogue}}%
+}
+
+\catcode32=13\relax% active space
+\let =\space%
+\Msg{************************************************************************}
+\Msg{*}
+\Msg{* To finish the installation you have to move the following}
+\Msg{* file into a directory searched by TeX:}
+\Msg{*}
+\Msg{* centernot.sty}
+\Msg{*}
+\Msg{* To produce the documentation run the file `centernot.drv'}
+\Msg{* through LaTeX.}
+\Msg{*}
+\Msg{* Happy TeXing!}
+\Msg{*}
+\Msg{************************************************************************}
+
+\endbatchfile
+%</install>
+%<*ignore>
+\fi
+%</ignore>
+%<*driver>
+\NeedsTeXFormat{LaTeX2e}
+\ProvidesFile{centernot.drv}%
+ [2016/05/16 v1.4 Centers the not symbol horizontally (HO)]%
+\documentclass{ltxdoc}
+\makeatletter
+%\@namedef{ver@fontspec.sty}{}
+\@namedef{ver@unicode-math.sty}{}
+\def\setmathfont#1{}
+\makeatother
+\usepackage{holtxdoc}[2011/11/22]
+\usepackage{centernot}[2016/05/16]
+\usepackage{amssymb}
+\DeclareFontFamily{U}{matha}{\hyphenchar\font45}
+\DeclareFontShape{U}{matha}{m}{n}{%
+ <5> <6> <7> <8> <9> <10> gen * matha %
+ <10.95> matha10 <12> <14.4> <17.28> <20.74> <24.88> matha12 %
+}{}
+\DeclareSymbolFont{matha}{U}{matha}{m}{n}
+\DeclareMathSymbol{\notdivides}{3}{matha}{"1F}
+\DeclareMathSymbol{\notrightarrow}{3}{matha}{"DB}
+\begin{document}
+ \DocInput{centernot.dtx}%
+\end{document}
+%</driver>
+% \fi
+%
+%
+% \CharacterTable
+% {Upper-case \A\B\C\D\E\F\G\H\I\J\K\L\M\N\O\P\Q\R\S\T\U\V\W\X\Y\Z
+% Lower-case \a\b\c\d\e\f\g\h\i\j\k\l\m\n\o\p\q\r\s\t\u\v\w\x\y\z
+% Digits \0\1\2\3\4\5\6\7\8\9
+% Exclamation \! Double quote \" Hash (number) \#
+% Dollar \$ Percent \% Ampersand \&
+% Acute accent \' Left paren \( Right paren \)
+% Asterisk \* Plus \+ Comma \,
+% Minus \- Point \. Solidus \/
+% Colon \: Semicolon \; Less than \<
+% Equals \= Greater than \> Question mark \?
+% Commercial at \@ Left bracket \[ Backslash \\
+% Right bracket \] Circumflex \^ Underscore \_
+% Grave accent \` Left brace \{ Vertical bar \|
+% Right brace \} Tilde \~}
+%
+% \GetFileInfo{centernot.drv}
+%
+% \title{The \xpackage{centernot} package}
+% \date{2016/05/16 v1.4}
+% \author{Heiko Oberdiek\thanks
+% {Please report any issues at https://github.com/ho-tex/oberdiek/issues}\\
+% \xemail{heiko.oberdiek at googlemail.com}}
+%
+% \maketitle
+%
+% \begin{abstract}
+% This package provides \cs{centernot} that prints the symbol
+% \cs{not} on the following argument. Unlike \cs{not} the symbol
+% is horizontally centered.
+% \end{abstract}
+%
+% \tableofcontents
+%
+% \section{User interface}
+%
+% If a negated relational symbol is not available, \cs{not}
+% can be used to create the negated variant of the relational
+% symbol. The disadvantage of \cs{not} is that it is put at
+% a fixed location regardless of the width of the relational
+% symbol. Therefore \cs{centernot} takes an argument and
+% measures its width to achieve a better placement of the
+% symbol \cs{not}.
+% Examples:
+% \begin{quote}
+% \begin{tabular}{@{}cccl@{}}
+% symbol & \cs{not} & \cs{centernot} &\\
+% \hline
+% |=| & $\not=$ & $\centernot=$ & \textit{(definition)}\\
+% \cs{parallel} & $\not\parallel$ & $\centernot\parallel$\\
+% \cs{longrightarrow} &
+% $\not\longrightarrow$ & $\centernot\longrightarrow$
+% \end{tabular}
+% \end{quote}
+% But do not forget that most negated symbols are already
+% available, e.g.:
+% \begin{quote}
+% \begin{tabular}{@{}lllc@{}}
+% case & package & code & result\\
+% \hline
+% \cs{parallel}:
+% &\xpackage{centernot} & |$A \centernot\parallel B$|
+% & $A \centernot\parallel B$\\
+% &\xpackage{amssymb} & |$A \nparallel B$|
+% & $A\nparallel B$\\
+% \hline
+% \cs{mid}:
+% &\xpackage{centernot} & |$A \centernot\mid B$|
+% & $A \centernot\mid B$\\
+% &\xpackage{amssymb} & |$A \nmid B$|
+% & $A \nmid B$\\
+% &\xpackage{mathabx} & |$A \notdivides B$|
+% & $A \notdivides B$\\
+% \hline
+% \cs{rightarrow}:
+% &\xpackage{centernot} & |$A \centernot\rightarrow B$|
+% & $A \centernot\rightarrow B$\\
+% &\xpackage{amssymb} & |$A \nrightarrow B$|
+% & $A \nrightarrow B$\\
+% &\xpackage{mathabx} & |$A \nrightarrow B$|
+% & $A \notrightarrow B$\\
+% \end{tabular}
+% \end{quote}
+%
+% \StopEventually{
+% }
+%
+% \section{Implementation}
+%
+% \begin{macrocode}
+%<*package>
+\NeedsTeXFormat{LaTeX2e}
+\ProvidesPackage{centernot}
+ [2016/05/16 v1.4 Centers the not symbol horizontally (HO)]%
+% \end{macrocode}
+%
+% \noindent
+% \cs{not} is a \cs{mathrel} atom with zero width. It prints itself
+% outside its character box, similar to \cs{rlap}. The next
+% \cs{mathrel} symbol is then print on top of it. \TeX\ does not
+% add space between two \cs{mathrel} atoms. The following implementation
+% assumes that the math font is designed in such a way that the
+% position of \cs{not} fits well on the equal symbol.
+%
+% The blue boxes marks the character bounding boxes seen by \TeX:
+% \begin{quote}
+% \setlength{\fboxrule}{.8pt}
+% \setlength{\fboxsep}{.8pt}
+% \def\xbox#1{^^A
+% \begingroup
+% \large
+% \color{blue}%
+% \fbox{\color{black}\boldmath$#1$}^^A
+% \kern-2\fboxsep
+% \kern-2\fboxrule
+% \endgroup
+% }
+% \begin{tabular}{@{}c@{\qquad}c@{\qquad}c@{}}
+% |\not| & |=| & |\not=|\\
+% \xbox{\not} & \xbox{=} & \xbox{\not}\xbox{=}
+% \end{tabular}
+% \end{quote}
+% \begin{macro}{\centernot}
+% \cs{centernot} is not a symbol but a macro that takes
+% one argument. It measures the width of the argument
+% and places \cs{not} horizontally centered on that argument.
+% The result is a \cs{mathrel} atom.
+% \begin{macrocode}
+\newcommand*{\centernot}{%
+ \mathpalette\@centernot
+}
+\def\@centernot#1#2{%
+ \mathrel{%
+ \rlap{%
+ \settowidth\dimen@{$\m@th#1{#2}$}%
+ \kern.5\dimen@
+ \settowidth\dimen@{$\m@th#1=$}%
+ \kern-.5\dimen@
+ $\m@th#1\not$%
+ }%
+ {#2}%
+ }%
+}
+% \end{macrocode}
+% \end{macro}
+%
+% \begin{macrocode}
+%</package>
+% \end{macrocode}
+%
+% \section{Installation}
+%
+% \subsection{Download}
+%
+% \paragraph{Package.} This package is available on
+% CTAN\footnote{\url{http://ctan.org/pkg/centernot}}:
+% \begin{description}
+% \item[\CTAN{macros/latex/contrib/oberdiek/centernot.dtx}] The source file.
+% \item[\CTAN{macros/latex/contrib/oberdiek/centernot.pdf}] Documentation.
+% \end{description}
+%
+%
+% \paragraph{Bundle.} All the packages of the bundle `oberdiek'
+% are also available in a TDS compliant ZIP archive. There
+% the packages are already unpacked and the documentation files
+% are generated. The files and directories obey the TDS standard.
+% \begin{description}
+% \item[\CTAN{install/macros/latex/contrib/oberdiek.tds.zip}]
+% \end{description}
+% \emph{TDS} refers to the standard ``A Directory Structure
+% for \TeX\ Files'' (\CTAN{tds/tds.pdf}). Directories
+% with \xfile{texmf} in their name are usually organized this way.
+%
+% \subsection{Bundle installation}
+%
+% \paragraph{Unpacking.} Unpack the \xfile{oberdiek.tds.zip} in the
+% TDS tree (also known as \xfile{texmf} tree) of your choice.
+% Example (linux):
+% \begin{quote}
+% |unzip oberdiek.tds.zip -d ~/texmf|
+% \end{quote}
+%
+% \paragraph{Script installation.}
+% Check the directory \xfile{TDS:scripts/oberdiek/} for
+% scripts that need further installation steps.
+% Package \xpackage{attachfile2} comes with the Perl script
+% \xfile{pdfatfi.pl} that should be installed in such a way
+% that it can be called as \texttt{pdfatfi}.
+% Example (linux):
+% \begin{quote}
+% |chmod +x scripts/oberdiek/pdfatfi.pl|\\
+% |cp scripts/oberdiek/pdfatfi.pl /usr/local/bin/|
+% \end{quote}
+%
+% \subsection{Package installation}
+%
+% \paragraph{Unpacking.} The \xfile{.dtx} file is a self-extracting
+% \docstrip\ archive. The files are extracted by running the
+% \xfile{.dtx} through \plainTeX:
+% \begin{quote}
+% \verb|tex centernot.dtx|
+% \end{quote}
+%
+% \paragraph{TDS.} Now the different files must be moved into
+% the different directories in your installation TDS tree
+% (also known as \xfile{texmf} tree):
+% \begin{quote}
+% \def\t{^^A
+% \begin{tabular}{@{}>{\ttfamily}l@{ $\rightarrow$ }>{\ttfamily}l@{}}
+% centernot.sty & tex/latex/oberdiek/centernot.sty\\
+% centernot.pdf & doc/latex/oberdiek/centernot.pdf\\
+% centernot.dtx & source/latex/oberdiek/centernot.dtx\\
+% \end{tabular}^^A
+% }^^A
+% \sbox0{\t}^^A
+% \ifdim\wd0>\linewidth
+% \begingroup
+% \advance\linewidth by\leftmargin
+% \advance\linewidth by\rightmargin
+% \edef\x{\endgroup
+% \def\noexpand\lw{\the\linewidth}^^A
+% }\x
+% \def\lwbox{^^A
+% \leavevmode
+% \hbox to \linewidth{^^A
+% \kern-\leftmargin\relax
+% \hss
+% \usebox0
+% \hss
+% \kern-\rightmargin\relax
+% }^^A
+% }^^A
+% \ifdim\wd0>\lw
+% \sbox0{\small\t}^^A
+% \ifdim\wd0>\linewidth
+% \ifdim\wd0>\lw
+% \sbox0{\footnotesize\t}^^A
+% \ifdim\wd0>\linewidth
+% \ifdim\wd0>\lw
+% \sbox0{\scriptsize\t}^^A
+% \ifdim\wd0>\linewidth
+% \ifdim\wd0>\lw
+% \sbox0{\tiny\t}^^A
+% \ifdim\wd0>\linewidth
+% \lwbox
+% \else
+% \usebox0
+% \fi
+% \else
+% \lwbox
+% \fi
+% \else
+% \usebox0
+% \fi
+% \else
+% \lwbox
+% \fi
+% \else
+% \usebox0
+% \fi
+% \else
+% \lwbox
+% \fi
+% \else
+% \usebox0
+% \fi
+% \else
+% \lwbox
+% \fi
+% \else
+% \usebox0
+% \fi
+% \end{quote}
+% If you have a \xfile{docstrip.cfg} that configures and enables \docstrip's
+% TDS installing feature, then some files can already be in the right
+% place, see the documentation of \docstrip.
+%
+% \subsection{Refresh file name databases}
+%
+% If your \TeX~distribution
+% (\teTeX, \mikTeX, \dots) relies on file name databases, you must refresh
+% these. For example, \teTeX\ users run \verb|texhash| or
+% \verb|mktexlsr|.
+%
+% \subsection{Some details for the interested}
+%
+% \paragraph{Attached source.}
+%
+% The PDF documentation on CTAN also includes the
+% \xfile{.dtx} source file. It can be extracted by
+% AcrobatReader 6 or higher. Another option is \textsf{pdftk},
+% e.g. unpack the file into the current directory:
+% \begin{quote}
+% \verb|pdftk centernot.pdf unpack_files output .|
+% \end{quote}
+%
+% \paragraph{Unpacking with \LaTeX.}
+% The \xfile{.dtx} chooses its action depending on the format:
+% \begin{description}
+% \item[\plainTeX:] Run \docstrip\ and extract the files.
+% \item[\LaTeX:] Generate the documentation.
+% \end{description}
+% If you insist on using \LaTeX\ for \docstrip\ (really,
+% \docstrip\ does not need \LaTeX), then inform the autodetect routine
+% about your intention:
+% \begin{quote}
+% \verb|latex \let\install=y\input{centernot.dtx}|
+% \end{quote}
+% Do not forget to quote the argument according to the demands
+% of your shell.
+%
+% \paragraph{Generating the documentation.}
+% You can use both the \xfile{.dtx} or the \xfile{.drv} to generate
+% the documentation. The process can be configured by the
+% configuration file \xfile{ltxdoc.cfg}. For instance, put this
+% line into this file, if you want to have A4 as paper format:
+% \begin{quote}
+% \verb|\PassOptionsToClass{a4paper}{article}|
+% \end{quote}
+% An example follows how to generate the
+% documentation with pdf\LaTeX:
+% \begin{quote}
+%\begin{verbatim}
+%pdflatex centernot.dtx
+%makeindex -s gind.ist centernot.idx
+%pdflatex centernot.dtx
+%makeindex -s gind.ist centernot.idx
+%pdflatex centernot.dtx
+%\end{verbatim}
+% \end{quote}
+%
+% \section{Catalogue}
+%
+% The following XML file can be used as source for the
+% \href{http://mirror.ctan.org/help/Catalogue/catalogue.html}{\TeX\ Catalogue}.
+% The elements \texttt{caption} and \texttt{description} are imported
+% from the original XML file from the Catalogue.
+% The name of the XML file in the Catalogue is \xfile{centernot.xml}.
+% \begin{macrocode}
+%<*catalogue>
+<?xml version='1.0' encoding='us-ascii'?>
+<!DOCTYPE entry SYSTEM 'catalogue.dtd'>
+<entry datestamp='$Date$' modifier='$Author$' id='centernot'>
+ <name>centernot</name>
+ <caption>Centred \not command.</caption>
+ <authorref id='auth:oberdiek'/>
+ <copyright owner='Heiko Oberdiek' year='2006,2007,2010,2011'/>
+ <license type='lppl1.3'/>
+ <version number='1.4'/>
+ <description>
+ The package provides <tt>\centernot</tt> that prints the symbol
+ <tt>\not</tt> on the following argument. Unlike the default
+ <tt>\not</tt> command, the symbol is horizontally centered.
+ <p/>
+ The package is part of the <xref refid='oberdiek'>oberdiek</xref>
+ bundle.
+ </description>
+ <documentation details='Package documentation'
+ href='ctan:/macros/latex/contrib/oberdiek/centernot.pdf'/>
+ <ctan file='true' path='/macros/latex/contrib/oberdiek/centernot.dtx'/>
+ <miktex location='oberdiek'/>
+ <texlive location='oberdiek'/>
+ <install path='/macros/latex/contrib/oberdiek/oberdiek.tds.zip'/>
+</entry>
+%</catalogue>
+% \end{macrocode}
+%
+% \begin{History}
+% \begin{Version}{2006/12/02 v1.0}
+% \item
+% First version.
+% \end{Version}
+% \begin{Version}{2007/05/31 v1.1}
+% \item
+% Real symbols added in documentation part.
+% \end{Version}
+% \begin{Version}{2010/03/29 v1.2}
+% \item
+% Documentation fix: `negotiated' to `negated' (Hartmut Henkel).
+% \end{Version}
+% \begin{Version}{2011/07/11 v1.3}
+% \item
+% Superfluous \cs{makeatother} removed (Martin M\"unch).
+% \end{Version}
+% \begin{Version}{2016/05/16 v1.4}
+% \item
+% Documentation updates.
+% \end{Version}
+% \end{History}
+%
+% \PrintIndex
+%
+% \Finale
+\endinput