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%  *****************************************
%  *            RUSpaper OPTION            *
%  *****************************************
%  *          USUS DOCUMENT STYLE          *
%  *****************************************
%

\typeout{USUS - Document Style Option 'RUSpaper'. Released 3 May 1988}
\makeatletter % make @ a letter

%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
% This was made from:
%
% ARTICLE DOCUMENT STYLE -- released 17 December 1985
%    for LaTeX version 2.09
% Copyright (C) 1985 by Leslie Lamport
%
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%



%    ****************************************
%    *         OTHER ENVIRONMENTS           *
%    ****************************************
%
% EQUATION and EQNARRAY
%
% \newcounter{equation}
%  Default is for left-hand side of equations to be flushleft.
%  To make them flushright, do:
%  \let\@eqnsel = \hfil
%
\def\theequation{\arabic{equation}}


%    ****************************************
%    *           SECTION HEADINGS           *
%    ****************************************
%
% \@startsection {NAME}{LEVEL}{INDENT}{BEFORESKIP}{AFTERSKIP}{STYLE}
%            optional * [ALTHEADING]{HEADING}
%    Generic command to start a section.
%    NAME       : e.g., 'subsection'
%    LEVEL      : a number, denoting depth of section -- e.g., chapter=1,
%                 section = 2, etc.  A section number will be printed if
%                 and only if LEVEL &lt; or = the value of the secnumdepth
%                 counter.
%    INDENT     : Indentation of heading from left margin
%    BEFORESKIP : Absolute value = skip to leave above the heading.
%                 If negative, then paragraph indent of text following
%                 heading is suppressed.
%    AFTERSKIP  : if positive, then skip to leave below heading,
%                       else - skip to leave to right of run-in heading.
%    STYLE      : commands to set style
%
%  If '*' missing, then increments the counter.  If it is present, then
%  there should be no [ALTHEADING] argument.  A sectioning command
%  is normally defined to \@startsection + its first six arguments.
%
\def\section{\@startsection {section}{1}{\z@}
    {-3.5ex plus -1ex minus  -.2ex}
    {2.3ex plus .2ex}{\Large\bf}}
\def\subsection{\@startsection {subsection}{2}{\z@}
    {-3.25ex plus -1ex minus -.2ex}
    {1.5ex plus .2ex}{\large\bf}}
\def\subsubsection{\@startsection {subsubsection}{3}{\z@}
    {-3.25ex plus -1ex minus -.2ex}
    {1.5ex plus .2ex}{\normalsize\bf}}
\def\paragraph{\@startsection {paragraph}{4}{\z@}
    {3.25ex plus 1ex minus .2ex}
    {-1em}{\normalsize\bf}}
\def\subparagraph{\@startsection {subparagraph}{4}{\parindent}
    {3.25ex plus 1ex minus .2ex}
    {-1em}{\normalsize\bf}}

%    ****************************************
%    *          SECTION NUMBERING           *
%    ****************************************
%
% For any counter CTR, \theCTR is a macro that defines the printed version
% of counter CTR.  It is defined in terms of the following macros:
%
%  \arabic{COUNTER} : The value of COUNTER printed as an arabic numeral.
%  \roman{COUNTER}  : Its value printed as a lower-case roman numberal.
%  \Roman{COUNTER}  : Its value printed as an upper-case roman numberal.
%  \alph{COUNTER}   : Value of COUNTER printed as a lower-case letter:
%                         1 = a, 2 = b, etc.
%  \Alph{COUNTER}   : Value of COUNTER printed as an upper-case letter:
%                           1 = A, 2 = B, etc.
%
\def\thepart          {\Roman{part}} % Roman numeral part numbers.
\def\thesection       {\arabic{section}}
\def\thesubsection    {\thesection.\arabic{subsection}}
\def\thesubsubsection {\thesubsection .\arabic{subsubsection}}
\def\theparagraph     {\thesubsubsection.\arabic{paragraph}}
\def\thesubparagraph  {\theparagraph.\arabic{subparagraph}}

%    ****************************************
%    *       TABLE OF CONTENTS ENTRIES      *
%    ****************************************
%
% \@dottedtocline{LEVEL}{INDENT}{NUMWIDTH}{TITLE}{PAGE}
%    LEVEL    : An entry is produced only if LEVEL &lt; or = value of
%               'tocdepth' counter.  Note, \chapter is level 0, \section
%               is level 1, etc.
%    INDENT   : The indentation from the outer left margin of the start of
%               the contents line.
%    NUMWIDTH : The width of a box in which the section number is to go,
%               if TITLE includes a \numberline command.
%
\def\l@section#1#2{
    \pagebreak [3]
    \addvspace{2\parskip}
    \begingroup
       { \bf
         \parindent    \z@
         \@tempdima    \@pnumwidth
         \rightskip    \@tocrmarg
         \parfillskip -\@tocrmarg
         \leavevmode #1\hfill#2\par}
    \endgroup}

\def\l@subsection    {\@dottedtocline{2} {1.5em} {2.3em}}
\def\l@subsubsection {\@dottedtocline{3} {3.8em} {3.2em}}
\def\l@paragraph     {\@dottedtocline{4} {7.0em} {4.1em}}
\def\l@subparagraph  {\@dottedtocline{5} {10em}  {5em}}

%    ****************************************
%    *         TABLE OF CONTENTS, ETC.      *
%    ****************************************
%
\setcounter{tocdepth}{4}

% TABLEOFCONTENTS
%
\def\tableofcontents{
    \section*{\@headtoc\@mkboth{\uppercase{\@headtoc}}{\uppercase{\@headtoc}}}
    \@starttoc{toc}}

% LIST OF FIGURES
%
\def\listoffigures{
    \section*{\@headlof\@mkboth{\uppercase{\@headlof}}{\uppercase{\@headlof}}}
    \@starttoc{lof}}
\def\l@figure{\@dottedtocline{1}{1.5em}{2.3em}}

% LIST OF TABLES
%
\def\listoftables{
    \section*{\@headlot\@mkboth{\uppercase{\@headlot}}{\uppercase{\@headlot}}}
    \@starttoc{lot}}
\let\l@table\l@figure


%    ****************************************
%    *             BIBLIOGRAPHY             *
%    ****************************************
%
% The thebibliography environment executes the following commands:
%
%  \def\newblock{\hskip .11em plus .33em minus -.07em} --
%      Defines the `closed' format, where the blocks (major units of
%      information) of an entry run together.
%
%  \sloppy  -- Used because it's rather hard to do line breaks in
%      bibliographies,
%
%  \sfcode`\.=1000\relax --
%      Causes a `.' (period) not toproduce an end-of-sentence space.

\def\thebibliography#1{
    \section*{\@headbib\@mkboth{\uppercase{\@headbib}}{\uppercase{\@headbib}}}
    \list {[\arabic{enumi}]}{\settowidth\labelwidth{[#1]}
                             \leftmargin\labelwidth
                             \advance\leftmargin\labelsep
                             \usecounter{enumi}}
    \def\newblock{\hskip .11em plus .33em minus -.07em}
    \sloppy
    \sfcode`\.=1000\relax}
\let\endthebibliography=\endlist


%    ****************************************
%    *              THE INDEX               *
%    ****************************************
%
% THE THEINDEX ENVIRONMENT
% Produces double column format, with each paragraph a separate entry.
% The user commands \item, \subitem and \subsubitem are used to
% produce the entries, and \indexspace adds an extra vertical space
% that's the right size to put above the first entry with a new letter
% of the alphabet.

\def\theindex{
    \@restonecoltrue
    \if@twocolumn\@restonecolfalse\fi
    \columnseprule \z@
    \columnsep 35pt
    \twocolumn
    \section*{\@headidx\@mkboth{\uppercase{\@headidx}}{\uppercase{\@headidx}}}
    \thispagestyle{plain}
    \parindent\z@
    \parskip\z@ plus .3pt
    \relax
    \let\item\@idxitem}


%    ****************************************
%    *         FIGURES AND TABLES           *
%    ****************************************
%
% FIGURE                                % TABLE
%                                       %
\def\thefigure{\@arabic\c@figure}       \def\thetable{\@arabic\c@table}


%    ****************************************
%    *         TITLE AND ABSTRACT           *
%    ****************************************
%
% TITLEPAGE
%  In the normal environments, the titlepage environment does nothing but
%  start and end a page, and inhibit page numbers.  It also resets the
%  page number to zero.
%
\def\titlepage{
    \@restonecolfalse
    \if@twocolumn
       \@restonecoltrue
       \onecolumn
    \else
       \newpage
    \fi
    \thispagestyle{empty}
    \c@page\z@}
\def\endtitlepage{
    \if@restonecol
       \twocolumn
    \else
       \newpage
    \fi}

% MAKETITLE
%
% \maketitle ==
%  BEGIN
%    \par
%    \begingroup
%      redefine \@makefnmark so footnote marks take zero space (this make
%        centering look better)
%      \thefootnote == \fnsymbol{footnote} % to number by *, dagger, etc.
%      if @twocolumn = true
%        then  \twocolumn[\@maketitle]
%        else \@maketitle
%      fi
%   \thispagestyle{plain}
%   \@thanks   % \thanks defines \@thanks to have \footnotetext commands for
%              % producing footnotes.
%   \endgroup
%  END

\def\maketitle{\par
    \begingroup
       \def\thefootnote{\fnsymbol{footnote}}
       \def\@makefnmark{\hbox to 0pt{$^{\@thefnmark}$\hss}}
       \if@twocolumn
          \twocolumn[\@maketitle]
          \else \newpage
          \global\@topnum\z@   % Prevents figures from going at top of page.
          \@maketitle
       \fi\thispagestyle{plain}\@thanks
    \endgroup
    \setcounter{footnote}{0}
    \let\maketitle\relax
    \let\@maketitle\relax
    \gdef\@thanks{}
    \gdef\@author{}
    \gdef\@title{}
    \let\thanks\relax}

\def\@maketitle{\newpage
    \null
    \vskip 2em                % Vertical space above title.
    \begin{center}
       {\LARGE \@title \par}     % Title set in \LARGE size.
       \vskip 1.5em              % Vertical space after title.
       { \large                  % each author set in \large, in a
         \lineskip .5em          % tabular environment
         \begin{tabular}[t]{c}
            \@author
         \end{tabular}\par}
       \vskip 1em                % Vertical space after author.
       {\large \@date}           % Date set in \large size.
    \end{center}
    \par
    \vskip 1.5em}             % Vertical space after date.

\def\abstract{
    \if@twocolumn
       \section*{\@headabstract
       \@mkboth{\uppercase{\@headabstract}}{\uppercase{\@headabstract}}}
    \else
       \small
       \begin{center}
          {\bf \@headabstract\vspace{-.5em}\vspace{0pt}}
       \end{center}
       \quotation
    \fi}
\def\endabstract{\if@twocolumn\else\endquotation\fi}


%    ****************************************
%    *           INITIALIZATION             *
%    ****************************************
%
% Default initializations

\if@twoside\else\raggedbottom\fi % Ragged bottom unless twoside option.
\makeatother                     % re-make @ a special character
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