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+%%
+%% LaTeX package `boldtensors'
+%%
+%% This program can be redistributed and/or modified under the
+%% terms of the GNU Public License, version 2.
+%%
+%% Copyright 1995 by Werner Fink und Juergen Bachteler
+%% Copyright 2007 by Werner Fink
+%%
+%% 1995/01/10
+%% Authors : Werner Fink und Juergen Bachteler
+%%           Institut fuer Theoretische und Angewandte Physik,
+%%           Universitaet Stuttgart
+%%           Pfaffenwaldring 57/vi, 7000 Stuttgart 80 
+%%
+%% 2007/06/29
+%% Author: Werner Fink <werner@suse.de>
+%%
+\NeedsTeXFormat{LaTeX2e}[1994/12/01]
+\ProvidesPackage{boldtensors}[1995/01/10 boldtensors]
+\@ifundefined{@bt@math}{\relax}%
+    {\message{-- boldtensors already loaded --}\endinput}
+\message{Document Style Option `boldtensors' }
+\newif\ifbt@nabla\bt@nablafalse
+\newif\ifbt@diffop\bt@diffopfalse
+\DeclareOption{nabla}{\bt@nablatrue}
+\DeclareOption{differential}{\bt@diffoptrue}
+\ProcessOptions
+%
+% Define a font family and some font shapes for both
+% bold latin and greek symbols in \mathversion{normal}
+% For all fonts we use \skewchar'177 then we can also
+% use accents even on the nabla operator.
+%
+\DeclareFontFamily{U}{cmten}{\skewchar\font='177}
+%
+% Bold italic standard version
+%
+\DeclareFontShape{U}{cmten}{b}{it}{%
+    <5> sfixed * [5.48] cmmib5
+    <6> sfixed * [6.57] cmmib6
+    <7> sfixed * [7.67] cmmib7
+    <8> sfixed * [8.76] cmmib8
+    <9> sfixed * [9.86] cmmib9
+    <10> sfixed * [10] cmmib10
+    <11> sfixed * [10.95] cmmib10
+    <12> sfixed * [12] cmmib10
+    <14> sfixed * [14.4] cmmib10
+    <17> sfixed * [17.28] cmmib10
+    <20> sfixed * [20.74] cmmib10
+    <25> sfixed * [24.88] cmmib10}{}
+%
+% Bold \mathrm numbers for null and one tensor
+% Some changes are done for upper greek symbols
+%
+\DeclareFontShape{U}{cmten}{bx}{n}{%
+    <5> sfixed * [5.48] cmbx5
+    <6> sfixed * [6.57] cmbx6
+    <7> sfixed * [7.67] cmbx7
+    <8> sfixed * [8.76] cmbx8
+    <9> sfixed * [9.86] cmbx9
+    <10> sfixed * [10] cmbx10
+    <11> sfixed * [10.95] cmbx10
+    <12> sfixed * [12] cmbx12
+    <14> sfixed * [14.4] cmbx12
+    <17> sfixed * [17.28] cmbx12
+    <20> sfixed * [20.74] cmbx12
+    <25> sfixed * [24.88] cmbx12}{}
+%
+% Some bold symbols useful for e.g. nabla operator
+% cmbsy5 upto cmbsy9 are found within the AMS fonts
+%
+\DeclareFontShape{U}{cmten}{b}{n}{%
+    <5> sfixed * [5.48] cmbsy5
+    <6> sfixed * [6.57] cmbsy6
+    <7> sfixed * [7.67] cmbsy7
+    <8> sfixed * [8.76] cmbsy8
+    <9> sfixed * [9.86] cmbsy9
+    <10> sfixed * [10] cmbsy10
+    <11> sfixed * [10.95] cmbsy10
+    <12> sfixed * [12] cmbsy10
+    <14> sfixed * [14.4] cmbsy10
+    <17> sfixed * [17.28] cmbsy10
+    <20> sfixed * [20.74] cmbsy10
+    <25> sfixed * [24.88] cmbsy10}{}
+%
+% The blackboards bolds from Jeffrey's
+%
+\DeclareFontShape{U}{cmten}{m}{n}{%
+    <5> sfixed * [5] bbold5
+    <6> sfixed * [6] bbold6
+    <7> sfixed * [7] bbold7
+    <8> sfixed * [8] bbold8
+    <9> sfixed * [9] bbold9
+    <10> sfixed * [10] bbold10
+    <11> sfixed * [10.95] bbold10
+    <12> sfixed * [12] bbold12
+    <14> sfixed * [14.4] bbold12
+    <17> sfixed * [17.28] bbold17
+    <20> sfixed * [20.74] bbold17
+    <25> sfixed * [24.88] bbold17}{}
+%
+% Now declare the symbol fonts
+%
+\DeclareSymbolFont{cmtensor}  {U}{cmten}{b} {it}
+\DeclareSymbolFont{cmoperator}{U}{cmten}{bx}{n}
+\DeclareSymbolFont{cmsymbols} {U}{cmten}{b} {n}
+\DeclareSymbolFont{cmbboard}  {U}{cmten}{m} {n}
+%
+% Set up fonts
+%
+\DeclareSymbolFontAlphabet{\btensor}  {cmtensor}
+\DeclareSymbolFontAlphabet{\boperator}{cmoperator}
+\DeclareSymbolFontAlphabet{\bsymbols} {cmsymbols}
+\DeclareSymbolFontAlphabet{\bboard}   {cmbboard}
+%
+% This macro helps us some none \mathalpha
+% symbols in a bold version
+%
+\let\@wait\expandafter
+\let\@null\relax
+\def\def@DeclareMathSymbol#1#2#3#4#5{\@wait%
+  \DeclareMathSymbol\csname#1@\string#2\endcsname{#3}{#4}{#5}}
+%
+% For both bold and blackboard bold symbols
+%
+\def\btens@DeclareMathSymbol{\def@DeclareMathSymbol{bt}}
+\def\bbold@DeclareMathSymbol{\def@DeclareMathSymbol{bb}}
+%
+% The bold tensor none \mathalpha symbols
+%
+\btens@DeclareMathSymbol{\alpha}{\mathord}{cmtensor}{"0B}
+\btens@DeclareMathSymbol{\beta}{\mathord}{cmtensor}{"0C}
+\btens@DeclareMathSymbol{\gamma}{\mathord}{cmtensor}{"0D}
+\btens@DeclareMathSymbol{\delta}{\mathord}{cmtensor}{"0E}
+\btens@DeclareMathSymbol{\epsilon}{\mathord}{cmtensor}{"0F}
+\btens@DeclareMathSymbol{\zeta}{\mathord}{cmtensor}{"10}
+\btens@DeclareMathSymbol{\eta}{\mathord}{cmtensor}{"11}
+\btens@DeclareMathSymbol{\theta}{\mathord}{cmtensor}{"12}
+\btens@DeclareMathSymbol{\iota}{\mathord}{cmtensor}{"13}
+\btens@DeclareMathSymbol{\kappa}{\mathord}{cmtensor}{"14}
+\btens@DeclareMathSymbol{\lambda}{\mathord}{cmtensor}{"15}
+\btens@DeclareMathSymbol{\mu}{\mathord}{cmtensor}{"16}
+\btens@DeclareMathSymbol{\nu}{\mathord}{cmtensor}{"17}
+\btens@DeclareMathSymbol{\xi}{\mathord}{cmtensor}{"18}
+\btens@DeclareMathSymbol{\pi}{\mathord}{cmtensor}{"19}
+\btens@DeclareMathSymbol{\rho}{\mathord}{cmtensor}{"1A}
+\btens@DeclareMathSymbol{\sigma}{\mathord}{cmtensor}{"1B}
+\btens@DeclareMathSymbol{\tau}{\mathord}{cmtensor}{"1C}
+\btens@DeclareMathSymbol{\upsilon}{\mathord}{cmtensor}{"1D}
+\btens@DeclareMathSymbol{\phi}{\mathord}{cmtensor}{"1E}
+\btens@DeclareMathSymbol{\chi}{\mathord}{cmtensor}{"1F}
+\btens@DeclareMathSymbol{\psi}{\mathord}{cmtensor}{"20}
+\btens@DeclareMathSymbol{\omega}{\mathord}{cmtensor}{"21}
+\btens@DeclareMathSymbol{\varepsilon}{\mathord}{cmtensor}{"22}
+\btens@DeclareMathSymbol{\vartheta}{\mathord}{cmtensor}{"23}
+\btens@DeclareMathSymbol{\varpi}{\mathord}{cmtensor}{"24}
+\btens@DeclareMathSymbol{\varrho}{\mathord}{cmtensor}{"25}
+\btens@DeclareMathSymbol{\varsigma}{\mathord}{cmtensor}{"26}
+\btens@DeclareMathSymbol{\varphi}{\mathord}{cmtensor}{"27}
+\btens@DeclareMathSymbol{\imath}{\mathord}{cmtensor}{"7B}
+\btens@DeclareMathSymbol{\jmath}{\mathord}{cmtensor}{"7C}
+%
+% Some bold integers and roman symbols
+%
+\btens@DeclareMathSymbol{1}{\mathord}{cmoperator}{"31}
+\btens@DeclareMathSymbol{0}{\mathord}{cmoperator}{"30}
+\btens@DeclareMathSymbol{\Gamma}{\mathord}{cmoperator}{"00}
+\btens@DeclareMathSymbol{\Delta}{\mathord}{cmoperator}{"01}
+\btens@DeclareMathSymbol{\Theta}{\mathord}{cmoperator}{"02}
+\btens@DeclareMathSymbol{\Lambda}{\mathord}{cmoperator}{"03}
+\btens@DeclareMathSymbol{\Xi}{\mathord}{cmoperator}{"04}
+\btens@DeclareMathSymbol{\Pi}{\mathord}{cmoperator}{"05}
+\btens@DeclareMathSymbol{\Sigma}{\mathord}{cmoperator}{"06}
+\btens@DeclareMathSymbol{\Upsilon}{\mathord}{cmoperator}{"07}
+\btens@DeclareMathSymbol{\Phi}{\mathord}{cmoperator}{"08}
+\btens@DeclareMathSymbol{\Psi}{\mathord}{cmoperator}{"09}
+\btens@DeclareMathSymbol{\Omega}{\mathord}{cmoperator}{"0A}
+%
+% The bold nabla operator
+%
+\ifbt@nabla
+\btens@DeclareMathSymbol{\nabla}{\mathord}{cmsymbols}{"72}\fi
+%
+% The blackboard bold greek characters
+%
+\bbold@DeclareMathSymbol{\alpha}{\mathord}{cmbboard}{"0B}
+\bbold@DeclareMathSymbol{\beta}{\mathord}{cmbboard}{"0C}
+\bbold@DeclareMathSymbol{\gamma}{\mathord}{cmbboard}{"0D}
+\bbold@DeclareMathSymbol{\delta}{\mathord}{cmbboard}{"0E}
+\bbold@DeclareMathSymbol{\epsilon}{\mathord}{cmbboard}{"0F}
+\bbold@DeclareMathSymbol{\zeta}{\mathord}{cmbboard}{"10}
+\bbold@DeclareMathSymbol{\eta}{\mathord}{cmbboard}{"11}
+\bbold@DeclareMathSymbol{\theta}{\mathord}{cmbboard}{"12}
+\bbold@DeclareMathSymbol{\iota}{\mathord}{cmbboard}{"13}
+\bbold@DeclareMathSymbol{\kappa}{\mathord}{cmbboard}{"14}
+\bbold@DeclareMathSymbol{\lambda}{\mathord}{cmbboard}{"15}
+\bbold@DeclareMathSymbol{\mu}{\mathord}{cmbboard}{"16}
+\bbold@DeclareMathSymbol{\nu}{\mathord}{cmbboard}{"17}
+\bbold@DeclareMathSymbol{\xi}{\mathord}{cmbboard}{"18}
+\bbold@DeclareMathSymbol{\pi}{\mathord}{cmbboard}{"19}
+\bbold@DeclareMathSymbol{\rho}{\mathord}{cmbboard}{"1A}
+\bbold@DeclareMathSymbol{\sigma}{\mathord}{cmbboard}{"1B}
+\bbold@DeclareMathSymbol{\tau}{\mathord}{cmbboard}{"1C}
+\bbold@DeclareMathSymbol{\upsilon}{\mathord}{cmbboard}{"1D}
+\bbold@DeclareMathSymbol{\phi}{\mathord}{cmbboard}{"1E}
+\bbold@DeclareMathSymbol{\chi}{\mathord}{cmbboard}{"1F}
+\bbold@DeclareMathSymbol{\psi}{\mathord}{cmbboard}{"20}
+\bbold@DeclareMathSymbol{\omega}{\mathord}{cmbboard}{"21}
+\bbold@DeclareMathSymbol{\varepsilon}{\mathord}{cmbboard}{"22}
+\bbold@DeclareMathSymbol{\vartheta}{\mathord}{cmbboard}{"23}
+\bbold@DeclareMathSymbol{\varpi}{\mathord}{cmbboard}{"24}
+\bbold@DeclareMathSymbol{\varrho}{\mathord}{cmbboard}{"25}
+\bbold@DeclareMathSymbol{\varsigma}{\mathord}{cmbboard}{"26}
+\bbold@DeclareMathSymbol{\varphi}{\mathord}{cmbboard}{"27}
+\bbold@DeclareMathSymbol{\imath}{\mathord}{cmbboard}{"7B}
+\bbold@DeclareMathSymbol{\jmath}{\mathord}{cmbboard}{"7C}
+%
+% Redeclare the small `d' to have differential operator in roman
+%
+\ifbt@diffop
+\DeclareMathSymbol{d}{\mathord}{operators}{`d}\fi
+%
+% For known symbols use them otherwise use font
+%
+\def\btens@#1{%
+   \@wait\ifx\csname bt@\string#1\endcsname\@null%
+     \mathord{\btensor#1}%
+   \else%
+     \csname bt@\string#1\endcsname%
+   \fi}
+\def\bbold@#1{%
+   \@wait\ifx\csname bb@\string#1\endcsname\@null%
+     \mathord{\bboard#1}%
+   \else%
+     \csname bb@\string#1\endcsname%
+   \fi}
+%
+% Do this only in math mode
+%
+\def\@bt@math{\ifmmode\@wait\btens@\else\@wait\bt@text\fi}
+\def\@bb@math{\ifmmode\@wait\bbold@\else\@wait\bb@text\fi}
+%
+% Avoid that macros will be broken
+%
+\def\bt@math{\protect\@bt@math}
+\def\bb@math{\protect\@bb@math}
+%
+% Switch cat code back for ~ and "
+%
+\def\outer@boldtensor{%
+  \catcode`\"=13\@null%
+  \catcode`\~=13\@null}
+%
+% Switch cat code to math for ~ and "
+%
+\def\inner@boldtensor{%
+  \mathcode`\"="8000\@null%
+  \mathcode`\~="8000\@null}
+%
+% Set up the hook for begin{document}
+%
+\begingroup
+  \outer@boldtensor\@null%
+  \gdef\boldtensor{%
+     \let\bt@text=~\@null%
+     \let\bb@text="\@null%
+     \let~=\bt@math\@null%
+     \let"=\bb@math\@null%
+     \let\boldtensor=\@null%
+     \inner@boldtensor\@null}
+  \AtBeginDocument{\boldtensor}
+\endgroup
+%
+% Just the end
+%
+\endinput