%% 
%% This is file `ltugboat.cls', generated 
%% on <1995/12/7> with the docstrip utility (2.2i).
%% 
%% The original source files were:
%% 
%% tugboat.dtx  (with options: `latex,classinfo,classtop,common,classtail,latex2e')
%% 
%% Copyright (C) 1994 TeX Users Group 
%% All rights reserved. 
%% 
%% This file is part of the Tugboat package. 
%% ----------------------------------------- 
%% 
%% This is a generated file. Permission is granted to to customize the 
%% declarations in this file to serve the needs of your installation. 
%% However, no permission is granted to distribute a modified version of 
%% this file under its original name. 
%% 
%% 
\def\fileversion{1.1g}
\def\filedate{1995/11/12}
\def\docdate {1995/11/12}
\NeedsTeXFormat{LaTeX2e}[1994/12/01]
\ProvidesClass{ltugboat}[\filedate\space TUGboat journal class]
\@ifundefined{tugstyloaded@}{\global\let\tugstyloaded@\end}%
  {\tugstyinit\endinput}
\def\TBInfo{\ClassInfo{tugboat}}
\def\TBError{\ClassError{tugboat}}
\def\TBWarning{\ClassWarning{tugboat}}
\newif\ifpreprint
\def\preprint{\preprinttrue}
\preprintfalse
\DeclareOption{draft}{%
   \setcounter{page}{1001}
   \overfullrule=5\p@
   \def\MakeRegistrationMarks{}
}
\DeclareOption{preprint}{%
   \preprinttrue
}
\DeclareOption{final}{%
   \special{papersize=8.5in,11in}
   \def\MakeRegistrationMarks{%
      \ulap{\rlap{%
         \vbox{\dlap{\vbox to\trimlgt{\vfil\botregister}}%
             \topregister\vskip \headmargin \vskip 10\p@}}}}%
   \overfullrule=\z@
}
\DeclareOption{11pt}{%
  \TBWarning{The TUGboat class only supports 10pt: option
    \CurrentOption\space ignored}%
}
\DeclareOption{12pt}{%
  \TBWarning{The TUGboat class only supports 10pt: option
    \CurrentOption\space ignored}%
}
\DeclareOption{tugproc}{%
  \TBWarning{Option \CurrentOption\space ignored: use class ltugproc
    instead of ltugboat}%
}
\newif\if@Harvardcite
\DeclareOption{rawcite}{\@Harvardcitefalse}
\DeclareOption{harvardcite}{\@Harvardcitetrue}
\DeclareOption*{\PassOptionsToClass{\CurrentOption}{article}}
\ExecuteOptions{draft,harvardcite}
\ProcessOptions
\LoadClass[twoside]{article}
\def\TBInfo{\ClassInfo{tugboat}}
\def\TBError{\ClassError{tugboat}}
\def\TBWarning{\ClassWarning{tugboat}}
\IfFileExists{mflogo.sty}%
  {\RequirePackage{mflogo}}%
  {\TBWarning{Package mflogo.sty not available}
   \ClassWarningNoLine{tugboat}{Proceeding to emulate mflogo.sty}
   \DeclareRobustCommand\logofamily{%
     \not@math@alphabet\logofamily\relax
     \fontencoding{U}\fontfamily{logo}\selectfont}
   \DeclareTextFontCommand{\textlogo}[]{{\logofamily}}
   \def\MF{\textlogo{META}\-\textlogo{FONT}\@}
   \def\MP{\textlogo{META}\-\textlogo{POST}\@}
   \DeclareFontFamily{U}{logo}{}
   \DeclareFontShape{U}{logo}{m}{n}{
     <8> <9> gen * logo
     <10> <10.95> <12> <14.4> <17.28> <20.74> <24.88> logo10
   }{}
   \DeclareFontShape{U}{logo}{m}{sl}{
     <8> <9> gen * logosl
     <10> <10.95> <12> <14.4> <17.28> <20.74> <24.88> logosl10
   }{}
   \DeclareFontShape{U}{logo}{m}{it}{
     <-> ssub * logo/m/sl
   }{}%
  }
\def\sectitlefont{\fontfamily\sfdefault\fontseries{bx}\fontshape{n}%
         \fontsize\@xviipt\stbaselineskip\selectfont}
\def\tensl{\fontseries{m}\fontshape{sl}\fontsize\@xpt\@xiipt
          \selectfont}
\def\tenuit{\fontfamily{cmr}\fontseries{m}\fontshape{ui}\fontsize\@xpt\@xiipt
          \selectfont}
\def\makeescape#1{\catcode`#1=0 }
\def\makebgroup#1{\catcode`#1=1 }
\def\makeegroup#1{\catcode`#1=2 }
\def\makemath#1{\catcode`#1=3 }
\def\makealign#1{\catcode`#1=4 }
\def\makeeol#1{\catcode`#1=5 }
\def\makeparm#1{\catcode`#1=6 }
\def\makesup#1{\catcode`#1=7 }
\def\makesub#1{\catcode`#1=8 }
\def\makeignore#1{\catcode`#1=9 }
\def\makespace#1{\catcode`#1=10 }
\def\makeletter#1{\catcode`#1=11 }
\def\makeother#1{\catcode`#1=12 }
\def\makeactive#1{\catcode`#1=13 }
\def\makecomment#1{\catcode`#1=14 }
\chardef\other=12
\def\savecat#1{%
  \expandafter\xdef\csname\string#1savedcat\endcsname{\the\catcode`#1}}
\def\restorecat#1{\catcode`#1=\csname\string#1savedcat\endcsname}
\def\SaveCS#1{%
  \def\scratch{\expandafter\let\csname saved@@#1\endcsname}%
  \expandafter\scratch\csname#1\endcsname}
\def\RestoreCS#1{%
  \def\scratch{\expandafter\let\csname#1\endcsname}%
  \expandafter\scratch\csname saved@@#1\endcsname}
\def\plaintubstyle{plain}
\def\latextubstyle{latex}
\providecommand\hb@xt@{\hbox to}
\providecommand\textsuperscript[1]{\ensuremath{\m@th
                                     ^{\mbox{\fontsize\sf@size\z@
                                         \selectfont #1}}}}
\def\AllTeX{(\La)\TeX}
\def\AMS{American Mathematical Society}
\def\AmS{$\mathcal{A}$\kern-.1667em\lower.5ex\hbox
    {$\mathcal{M}$}\kern-.125em$\mathcal{S}$}
\def\AmSLaTeX{\AmS-\LaTeX}
\def\AmSTeX{\AmS-\TeX}
\def\aw{A\kern.1em-W}
\def\AW{Addison\kern.1em-\penalty\z@\hskip\z@skip Wesley}
\def\BibTeX{\textsc{Bib}\kern-.08em\TeX}
\def\CandT{\textsl{Computers \& Typesetting}}
\def\CTAN{\acro{CTAN}}
\def\DTD{\acro{DTD}}
\def\DVItoVDU{DVIto\kern-.12em VDU}
\DeclareRobustCommand\eTeX{\ensuremath{\varepsilon}-\kern-.125em\TeX}
\def\HTML{\acro{HTML}}
\def\ISBN{\acro{ISBN}}
\def\ISSN{\acro{ISSN}}
\def\JTeX{\leavevmode\hbox{\lower.5ex\hbox{J}\kern-.18em\TeX}}
\def\JoT{\textsl{The Joy of \TeX}}
\def\LAMSTeX{L\raise.42ex\hbox{\kern-.3em
                   $\m@th$\fontsize\sf@size\z@\selectfont
                   $\m@th\mathcal{A}$}%
    \kern-.2em\lower.376ex\hbox{$\m@th\mathcal{M}$}\kern-.125em
    {$\m@th\mathcal{S}$}-\TeX}
\newcommand{\La}%
   {L\kern-.36em
        {\setbox0\hbox{T}%
         \vbox to\ht0{\hbox{$\m@th$%
                            \csname S@\f@size\endcsname
                            \fontsize\sf@size\z@
                            \math@fontsfalse\selectfont
                            A}%
                      \vss}%
        }}
\def\Mc{\setbox\TestBox=\hbox{M}M\vbox
   to\ht\TestBox{\hbox{c}\vfil}} %  for Robert McGaffey
\def\mf{\textsc{Metafont}}
\def\MFB{\textsl{The \MF book}}
\def\mtex{T\kern-.1667em\lower.424ex\hbox{\^E}\kern-.125emX\@}
\DeclareRobustCommand\NTS{$\mathcal{N}$\lower.5ex\hbox
    {$\mathcal{T}$}$\mathcal{S}$\@}
\def\pcMF{\leavevmode\raise.5ex\hbox{p\kern-.3\p@ c}MF\@}
\def\PCTeX{PC\thinspace\TeX}
\def\pcTeX{\leavevmode\raise.5ex\hbox{p\kern-.3\p@ c}\TeX}
\def\Pas{Pascal}
\def\PiC{P\kern-.12em\lower.5ex\hbox{I}\kern-.075emC\@}
\def\PiCTeX{\PiC\kern-.11em\TeX}
\def\plain{\texttt{plain}}
\def\POBox{P.\thinspace O.~Box }
\def\PS{{Post\-Script}}
\def\SC{Steering Committee}
\def\SGML{\acro{SGML}}
\def\SliTeX{\textrm{S\kern-.06em\textsc{l\kern-.035emi}%
                     \kern-.06em\TeX}}
 \def\slMF{\textsl{\MF}} % should never be used
\def\stTeX{\textsc{st}\kern-0.13em\TeX}   %  (Klaus Guntermann)
\def\TANGLE{\texttt{TANGLE}\@}
\def\TB{\textsl{The \TeX book}}
\def\TP{\textsl{\TeX}: \textsl{The Program}}
\def\TeX{T\kern-.1667em\lower.424ex\hbox{E}\kern-.125emX\@}
\def\TeXhax{\TeX hax}
\def\TeXMaG{\TeX M\kern-.1667em\lower.5ex\hbox{A}%
   \kern-.2267emG\@}
\def\TeXtures{\textit{Textures}}
\let\Textures=\TeXtures
\def\TeXXeT{\TeX-{}-\XeT}
\def\ttn{\textsl{TTN}\@}
\def\TTN{\textsl{\TeX{} and TUG News}\@}
\let\texttub\textsl              % redefined in other situations
\def\TUB{\texttub{TUGboat}}
\def\TUG{\TeX\ \UG}
\def\tug{\acro{TUG}}
\def\UG{Users Group}
\def\UNIX{\acro{UNIX}}
\def\VAX{V\kern-.12em A\kern-.1em X\@}
\def\VorTeX{V\kern-2.7\p@\lower.5ex\hbox{O\kern-1.4\p@ R}\kern-2.6\p@\TeX}
\def\XeT{X\kern-.125em\lower.424ex\hbox{E}\kern-.1667emT\@}
\def\WEB{\texttt{WEB}\@}
\def\WEAVE{\texttt{WEAVE}\@}
\newlinechar=`\^^J
\normallineskiplimit=\p@
\clubpenalty=10000
\widowpenalty=10000
\def\NoParIndent{\parindent=\z@}
\newdimen\normalparindent
\normalparindent=20\p@          % plain = 20pt
\def\NormalParIndent{\global\parindent=\normalparindent}
\NormalParIndent
\def\BlackBoxes{\overfullrule=5\p@ }
\def\NoBlackBoxes{\overfullrule=\z@ }
\def\newline{\hskip\z@\@plus\pagewd\break}
\edef\allowhyphens{\noexpand\hyphenpenalty\the\hyphenpenalty\relax
  \noexpand\exhyphenpenalty\the\exhyphenpenalty\relax}
\def\nohyphens{\hyphenpenalty\@M\exhyphenpenalty\@M}
\newbox\T@stBox                 \newbox\TestBox
\newcount\T@stCount             \newcount\TestCount
\newdimen\T@stDimen             \newdimen\TestDimen
\newif\ifT@stIf                 \newif\ifTestIf
\def\ifundefined#1{\expandafter\ifx\csname#1\endcsname\relax }
\newif\iftop@           \newif\ifbot@
\def\topsmash{\top@true\bot@false\smash@}
\def\botsmash{\top@false\bot@true\smash@}
\def\smash{\top@true\bot@true\smash@}
\def\smash@{\relax\ifmmode\def\next{\mathpalette\mathsm@sh}%
        \else\let\next\makesm@sh\fi \next }
\def\finsm@sh{\iftop@\ht\z@\z@\fi\ifbot@\dp\z@\z@\fi\box\z@}
\long\def\ulap#1{\vbox to \z@{\vss#1}}
\long\def\dlap#1{\vbox to \z@{#1\vss}}
\def\xlap#1{\hb@xt@\z@{\hss#1\hss}}
\long\def\ylap#1{\vbox to \z@{\vss#1\vss}}
\long\def\zlap#1{\ylap{\xlap{#1}}}
\def\basezero{\baselineskip\z@skip \lineskip\z@skip}
\def\nullhrule{\hrule \@height\z@ \@depth\z@ \@width\z@ }
\def\nullvrule{\vrule \@height\z@ \@depth\z@ \@width\z@ }
\def\makestrut[#1;#2]{\vrule \@height#1 \@depth#2 \@width\z@ }
\def\drawoutlinebox[#1;#2;#3]{\T@stDimen=#3
        \vbox to#1{\hrule \@height\T@stDimen \@depth\z@
            \vss\hb@xt@#2{\vrule \@width\T@stDimen
                \hfil\makestrut[#1;\z@]%
                \vrule \@width\T@stDimen}\vss
            \hrule \@height\T@stDimen \@depth\z@}}
\newcount\hours
\newcount\minutes
\def\SetTime{\hours=\time
        \global\divide\hours by 60
        \minutes=\hours
        \multiply\minutes by 60
        \advance\minutes by-\time
        \global\multiply\minutes by-1 }
\SetTime
\def\now{\number\hours:\ifnum\minutes<10 0\fi\number\minutes}
\def\Now{\today\ \now}
\newif\ifPrelimDraft
\PrelimDraftfalse
\def\midrtitle{\ifPrelimDraft {\textsl{preliminary draft, \Now}}\fi}
\newdimen\raggedskip    \raggedskip=\z@
\newdimen\raggedstretch \raggedstretch=5em    % ems of font set now (10pt)
\newskip\raggedparfill  \raggedparfill=\z@\@plus 1fil
\def\raggedspaces{\spaceskip=.3333em \relax \xspaceskip=.5em \relax }
\def\raggedright{%
  \nohyphens
  \rightskip=\raggedskip\@plus\raggedstretch \raggedspaces
  \parfillskip=\raggedparfill }
\def\raggedleft{%
  \nohyphens
  \leftskip=\raggedskip\@plus\raggedstretch \raggedspaces
  \parfillskip=\z@skip }
\def\raggedcenter{%
  \nohyphens
  \leftskip=\raggedskip\@plus\raggedstretch
  \rightskip=\leftskip \raggedspaces
  \parindent=\z@ \parfillskip=\z@skip }
\def\normalspaces{\spaceskip\z@skip \xspaceskip\z@skip }
\def~{\unskip\nobreak\ \ignorespaces}
\def\newbox{\alloc@4\box\chardef\insc@unt}   % remove \outer
\def\boxcs#1{\box\csname#1\endcsname}
\def\setboxcs#1{\setbox\csname#1\endcsname}
\def\newboxcs#1{\expandafter\newbox\csname#1\endcsname}
\def\gobble#1{}
\def\vellipsis{%
  \leavevmode\kern0.5em
  \raise\p@\vbox{\baselineskip6\p@\vskip7\p@\hbox{.}\hbox{.}\hbox{.}}
  }
\def\bull{\vrule \@height 1ex \@width .8ex \@depth -.2ex }
\def\cents{{\rm\raise.2ex\rlap{\kern.05em$\scriptstyle/$}c}}
\def\Dag{\raise .6ex\hbox{$\scriptstyle\dagger$}}
\def\careof{\leavevmode\hbox{\raise.75ex\hbox{c}\kern-.15em
                /\kern-.125em\smash{\lower.3ex\hbox{o}}} \ignorespaces}
\def\sfrac#1/#2{\leavevmode\kern.1em\raise.5ex
        \hbox{$\m@th\mbox{\fontsize\sf@size\z@
                          \selectfont#1}$}\kern-.1em
        /\kern-.15em\lower.25ex
        \hbox{$\m@th\mbox{\fontsize\sf@size\z@
                          \selectfont#2}$}}
\def\thinskip{\hskip 0.16667em\relax}
\def\endash{--}
\def\emdash{\endash-}
\def\d@sh#1#2{\unskip#1\thinskip#2\thinskip\ignorespaces}
\def\dash{\d@sh\nobreak\endash}
\def\Dash{\d@sh\nobreak\emdash}
\def\ldash{\d@sh\empty{\hbox{\endash}\nobreak}}
\def\rdash{\d@sh\nobreak\endash}
\def\Ldash{\d@sh\empty{\hbox{\emdash}\nobreak}}
\def\Rdash{\d@sh\nobreak\emdash}
\def\hyph{-\penalty\z@\hskip\z@skip }
\def\slash{/\penalty\z@\hskip\z@skip }
\def\nth#1{%
    \def\reserved@a##1##2\@nil{\ifcat1##1##1##2\else0\fi}%
    \TestCount=\reserved@a#1\@nil\relax
    \ifnum\TestCount <0 \multiply\TestCount by\m@ne \fi % subdue negatives
    \T@stCount=\TestCount
    \divide\T@stCount by 100 \multiply\T@stCount by 100
    \advance\TestCount by-\T@stCount     % n mod 100
    \ifnum\TestCount >20 \T@stCount=\TestCount
      \divide\T@stCount by 10 \multiply\T@stCount by 10
      \advance\TestCount by-\T@stCount   % n mod 10
    \fi
     #1\textsuperscript{\ifcase\TestCount th%    0th
                        \or   st%                1st
                        \or   nd%                2nd
                        \or   rd%                3rd
                        \else th%                nth
                        \fi}%
     }
\def\Review:#1{\ifx[#1\@Rev[%
  \else Book review:\enspace\sl #1%
  \fi
  }
\def\@Rev[#1]{\ignorespaces#1\unskip:\enspace\ignorespaces\sl}
\def\reviewitem{%
  \def\revauth##1{\def\therevauth{##1, }\ignorespaces}%
  \def\revtitle##1{\def\therevtitle{{\sl##1}. }\ignorespaces}%
  \def\revpubinfo##1{\def\therevpubinfo{##1.}\ignorespaces}%
  }
\def\endreviewitem{{\noindent\interlinepenalty=10000
  \therevauth\therevtitle\therevpubinfo\endgraf}%
  \vskip\medskipamount
  }
\def\booktitle#1{{\sl #1\/}}
\newcount\issueseqno            \issueseqno=-1
\def\v@lx{\gdef\volx{Volume~\volno~(\volyr), No.~\issno}}
\def\volyr{}
\def\volno{}
\def\vol #1,#2.{\gdef\volno{#1\unskip}%
        \gdef\issno{\ignorespaces#2\unskip}%
        \setbox\TestBox=\hbox{\volyr}%
        \ifdim \wd\TestBox > .2em \v@lx \fi }
\def\issdate #1#2 #3.{\gdef\issdt{#1#2 #3}\gdef\volyr{#3}%
        \gdef\bigissdt{#1{\smc\uppercase{#2}} #3}%
        \setbox\TestBox=\hbox{\volno}%
        \ifdim \wd\TestBox > .2em \v@lx \fi }
\vol 0, 0.
\issdate Thermidor, 2001.
\def\tubissue#1#2{\TUB~#1, no.~#2}
\def\infil@{\jobname}
\def\Input #1 {\ifnum\issueseqno<0 \def\infil@{#1}%
                \else \def\infil@{tb\number\issueseqno#1}\fi
                \edef\jobname{\infil@}\@readFLN
                \@@input \infil@\relax
                \ifRMKopen\immediate\closeout\TBremarkfile\RMKopenfalse\fi}
\newif\ifRMKopen        \RMKopenfalse
\newwrite\TBremarkfile
\def\TBremarkON#1{%
  \ifRMKopen\else\RMKopentrue\immediate\openout\TBremarkfile=\infil@.rmk \fi
  \toks@={#1}%
  \immediate\write\TBremarkfile{^^J\the\toks@}%
  \immediate\write16{^^JTBremark:: \the\toks@^^J}}
\def\TBremarkOFF#1{}
\let\TBremark=\TBremarkOFF
\def\TBEnableRemarks{\let\TBremark\TBremarkON}
\def\TUBedit#1{}
\def\TUBfilename#1#2{\expandafter\def\csname file@@#1\endcsname{#2}}
\InputIfFileExists{\jobname.fln}%
     {\TBInfo{Reading alternative file file \jobname.fln}}{}
\def\@tubfilename#1{\expandafter\ifx\csname file@@#1\endcsname\relax
  #1\else\csname file@@#1\endcsname\fi}
\def\fileinput#1{\@@input\@tubfilename{#1} }
\def\pagexrefON#1{%
        \write-1{\def\expandafter\noexpand\csname#1\endcsname{\number\c@page}}%
        \write\ppoutfile{%
                \def\expandafter\noexpand\csname#1\endcsname{\number\c@page}}%
        }
\def\PageXrefON#1{%
        \immediate\write-1{\def\expandafter
                        \noexpand\csname#1\endcsname{\number\c@page}}%
        \immediate\write\ppoutfile{\def\expandafter
                        \noexpand\csname#1\endcsname{\number\c@page}}}
\def\pagexrefOFF#1{}
\let\pagexref=\pagexrefOFF
\def\PageXrefOFF#1{}
\let\PageXref=\PageXrefOFF
\def\xreftoON#1{%
  \ifundefined{#1}%
    ???\TBremark{Need cross reference for #1.}%
  \else\csname#1\endcsname\fi}
\def\xreftoOFF#1{???}
\let\xrefto=\xreftoOFF
\def\TBdriver#1{}
\hyphenation{Eijk-hout Hara-lam-bous man-u-script man-u-scripts}
\PrelimDrafttrue
\textheight 54pc
\textwidth 39pc
\columnsep 1.5pc
\columnwidth 18.75pc
\parindent \normalparindent
\parskip \z@ % \@plus\p@
\leftmargini 2em
\leftmarginv .5em
\leftmarginvi .5em
\oddsidemargin \z@
\evensidemargin \z@
\topmargin -2.5pc
\headheight 12\p@
\headsep 20\p@
\marginparwidth 48\p@
\marginparsep 10\p@
\partopsep=\z@
\topsep=3\p@\@plus\p@\@minus\p@
\parsep=3\p@\@plus\p@\@minus\p@
\itemsep=\parsep
\twocolumn
\newdimen\pagewd        \pagewd=39pc
\newdimen\trimwd        \trimwd=\pagewd
\newdimen\trimlgt       \trimlgt=11in
\newdimen\headmargin    \headmargin=3.5pc
\def\theauthor#1{\csname theauthor#1\endcsname}
\def\theaddress#1{\csname theaddress#1\endcsname}
\def\thenetaddress#1{\csname thenetaddress#1\endcsname}
\def\thePersonalURL#1{\csname thePersonalURL#1\endcsname}
\newcount\count@@
\def\@defaultauthorlist{%
   \count@=\authornumber
   \advance\count@ by -2
   \count@@=0
   \loop
   \ifnum\count@>0
      \advance\count@@ by 1
      \ignorespaces\csname theauthor\number\count@@\endcsname\unskip,
      \advance\count@ by -1
   \repeat
   \count@=\authornumber
   \advance\count@ by -\count@@
   \ifnum\authornumber>0
     \ifnum\count@>1
       \count@=\authornumber
       \advance\count@ by -1
       \ignorespaces\csname theauthor\number\count@\endcsname\unskip\ and
       \fi
     \ignorespaces\csname theauthor\number\authornumber\endcsname\unskip
   \fi
  }
\def\signature#1{\def\@signature{#1}}
\def\@signature{\@defaultsignature}
\def\@defaultsignature{%
  \count@=0
  \loop
  \ifnum\count@<\authornumber
    \medskip
    \advance\count@ by \@ne
    \signaturemark
    \theauthor{\number\count@}\\
    \theaddress{\number\count@}\\
    {%
      \allowhyphens
      \thenetaddress{\number\count@}\\
      \thePersonalURL{\number\count@}\\
    }%
  \repeat
  }
\newdimen\signaturewidth   \signaturewidth=12pc
\def\makesignature{%
  \par
  \penalty9000
  \medskip
  \rightline{%
    \vbox{\hsize\signaturewidth \ninepoint \raggedright
      \parindent \z@ \everypar={\hangindent 1pc }
      \parskip \z@skip
      \def\|{\unskip\hfil\break}%
      \def\\{\endgraf}%
      \def\phone{\rm Phone: }
      \rm\@signature}}
  }
\def\signaturemark{\leavevmode\llap{$\diamond$\enspace}}
\newcount\authornumber
\authornumber=0
\def\author#1{%
  \global\advance\authornumber\@ne
  \expandafter\def\csname theauthor\number\authornumber\endcsname
      {\ignorespaces#1\unskip}%
  \expandafter\def\csname theaddress\number\authornumber\endcsname
    {\TBWarning{Address for #1\space missing}\@gobble}%
  \expandafter\def\csname thenetaddress\number\authornumber\endcsname
    {\TBWarning{Net address for #1\space missing}\@gobble}%
  \expandafter\let\csname thePersonalURL\number\authornumber\endcsname
    \@gobble
  }
\def\address#1{%
  \expandafter\def\csname theaddress\number\authornumber\endcsname
      {\leavevmode\ignorespaces#1\unskip}}
\def\network#1{\def\@network{#1: }}
\newcommand\netaddress[1][\relax]{%
  \begingroup
  \def\@network{Email: }%
  #1\@sanitize\makespace\ \makeactive\@
  \makeactive\.\makeactive\%\@relay@netaddress}%
\def\@relay@netaddress#1{%
  \ProtectNetChars
  \expandafter\xdef\csname thenetaddress\number\authornumber\endcsname
  {\leavevmode\noexpand\textrm{\@network}%
     {\noexpand\NetAddrChars\noexpand\net
      \ignorespaces#1\unskip}}%
  \endgroup
  }
\def\personalURL{\begingroup
  \@sanitize\makespace\ \makeactive\@
  \makeactive\.\makeactive\%\makeactive\/\@personalURL}%
\def\@personalURL#1{%
  \ProtectNetChars
  \expandafter\xdef\csname thePersonalURL\number\authornumber\endcsname
  {\leavevmode\noexpand\textrm{URL\noexpand\@: }%
     {\noexpand\URLchars\noexpand\net
      \ignorespaces#1\unskip}}%
  \endgroup
  }
{%
  \makecomment\*
  \makeactive\@
  \gdef\netaddrat{\makeactive\@*
    \def@{\discretionary{\char"40}{}{\char"40}}}
  \makeactive\%
  \gdef\netaddrpercent{\makeactive\%*
    \def%{\discretionary{\char"25}{}{\char"25}}}
  \makeactive\.
  \gdef\netaddrdot{\makeactive\.*
    \def.{\discretionary{\char"2E}{}{\char"2E}}}
  \gdef\NetAddrChars{\netaddrat \netaddrpercent \netaddrdot}
  \makeactive\/
  \gdef\URLchars{*
    \NetAddrChars
    \makeactive\/*
    \def/{\discretionary{\char"2F}{}{\char"2F}}}
  \gdef\ProtectNetChars{*
    \def@{\noexpand@}*
    \def%{\noexpand%}*
    \def.{\noexpand.}*
    \def/{\noexpand/}*
    }
}
\if@compatibility
  \DeclareRobustCommand\net{\normalfont\ttfamily\mathgroup\symtypewriter}
\else
  \DeclareOldFontCommand{\net}{\ttfamily\upshape\mdseries}{\mathtt}
\fi
\def\authorlist#1{\def\@author{#1}}
\def\@author{\@defaultauthorlist}
\def\maketitle{\par
 \ifdim\PreTitleDrop > \z@
   \loop
   \ifdim \PreTitleDrop > \textheight
     \vbox{}\vfil\eject
     \advance\PreTitleDrop by -\textheight
   \repeat
   \vbox to \PreTitleDrop{}
   \global\PreTitleDrop=\z@
 \fi
 \begingroup
 \setcounter{footnote}{0}
 \def\thefootnote{\fnsymbol{footnote}}
 \@maketitle
 \@thanks
 \endgroup
 \setcounter{footnote}{0}
 \gdef\@thanks{}
 }
\def\secsep{\vskip 5\baselineskip}
\newdimen\stbaselineskip        \stbaselineskip=18\p@
\setbox\T@stBox=\hbox{\sectitlefont O}
\newdimen\stfontheight
\stfontheight=\ht\T@stBox
\newif\ifSecTitle
\SecTitlefalse
\def \sectitle#1{\SecTitletrue \def\s@ctitle{#1}}
\newdimen\PreTitleDrop   \PreTitleDrop=\z@
\newskip\AboveTitleSkip  \AboveTitleSkip=12\p@
\newskip\BelowTitleSkip  \BelowTitleSkip=8\p@
\newdimen\strulethickness       \strulethickness=.6\p@
\def\sthrule{\hrule \@height\strulethickness \@depth\z@ }
\def\stvrule{\vrule \@width\strulethickness }
\def\@sectitle #1{%
  \par \SecTitletrue
  \penalty-1000
  \secsep
  \vbox{%
    \sthrule
    \hbox{%
      \stvrule
      \vbox{%
        \advance\hsize by -2\strulethickness
        \raggedcenter
        \def\\{\unskip\break}%
        \sectitlefont
        \makestrut[2\stfontheight;\z@]%
        #1%
        \makestrut[\z@;\stfontheight]\endgraf
        }%
      \stvrule }%
    \sthrule }%
  \nobreak
  \vskip\baselineskip }
\newif\ifWideSecTitle
\def\@maketitle{\ifSecTitle \global\SecTitlefalse
                \T@stDimen=\hsize
                \ifWideSecTitle \hsize=\textwidth \global\WideSecTitlefalse \fi
                \@sectitle{\s@ctitle}%
                \hsize=\T@stDimen
        \else \vskip\AboveTitleSkip
                \kern\topskip
                \hrule \@height\z@ \@depth\z@ \@width 10\p@
                \kern-\topskip
                \kern-\strulethickness
                \hrule \@height\strulethickness \@depth\z@
                \kern\medskipamount
                \nobreak
        \fi
        {\nohyphens \interlinepenalty\@M
        \setbox0=
          \hbox{\let\thanks\@gobble
                \let\\=\quad
                \let\and=\quad
                \ignorespaces\@author}%
        {\noindent\bf\raggedright\ignorespaces\@title\endgraf}%
        \ifdim \wd0 < 5\p@               % omit if author is null
        \else \nobreak \vskip 4\p@       % 4pt + \BelowTitleSkip = \baselineskip
                {\leftskip=\normalparindent
                 \raggedright
                 \def\and{\unskip\\}%
                 \noindent\@author\endgraf}%
        \fi \nobreak \vskip\BelowTitleSkip }}

 \def\dedication{\bgroup\raggedright\noindent\it\ignorespaces}
\def\enddedication{\endgraf\egroup\medskip}

\def\abstract{
\section*{Abstract}
}
\def\endabstract{}

\def\longabstract{
  \section*{Abstract}
  \bgroup\small}
\def\endlongabstract{\endgraf\egroup
  \vspace{.25\baselineskip}
  \begin{center}
    {$--*--$}
  \end{center}
  \vspace{.5\baselineskip}}

\def\section{\@startsection {section}1\z@{-8\p@}{4\p@}%
        {\normalsize\bf\raggedright\hyphenpenalty=\@M}}

\def\subsection{\@startsection{subsection}2\z@{-8\p@}{4\p@}%
        {\normalsize\bf\raggedright\hyphenpenalty=\@M}}

\def\subsubsection{\@startsection{subsubsection}3\z@{-8\p@}{4\p@}%
        {\normalsize\bf\raggedright\hyphenpenalty=\@M}}

\def\paragraph{\@startsection
 {paragraph}4\z@{2.5ex\@plus 1ex}{-1em}{\normalsize\bf}}

\def\subparagraph{\@startsection
 {subparagraph}5\parindent{2.5ex\@plus 1ex}{-1em}{\normalsize\bf}}

\def\l@part#1#2{\addpenalty{\@secpenalty}
 \addvspace{2.25em\@plus\p@}
 \begingroup
  \@tempdima 3em \parindent\z@ \rightskip\z@ \parfillskip\z@
  {\large \bf \leavevmode #1\hfil \hbox to\@pnumwidth{\hss #2}}\par
  \nobreak
 \endgroup}
\def\l@section#1#2{\addpenalty{\@secpenalty} \addvspace{1.0em\@plus\p@}
 \@tempdima 1.5em
 \begingroup
  \parindent\z@ \rightskip\z@  % article style makes \rightskip > 0
  \parfillskip\z@
  \bf \leavevmode \advance\leftskip\@tempdima \hskip -\leftskip #1\nobreak\hfil
  \nobreak\hb@xt@\@pnumwidth{\hss #2}\par
 \endgroup}
\long\def\@makecaption#1#2{%
  \vskip\abovecaptionskip
  \sbox\@tempboxa{#1: #2}%
  \ifdim \wd\@tempboxa >\hsize
    \raggedright\hyphenpenalty=\@M
    #1: #2\par
  \else
    \global \@minipagefalse
    \hb@xt@\hsize{\hfil\box\@tempboxa\hfil}%
  \fi
  \vskip\belowcaptionskip}
\renewcommand\normalsize{%
   \@setfontsize\normalsize\@xpt\@xiipt
   \abovedisplayskip=3\p@\@plus 3\p@\@minus\p@
   \belowdisplayskip=\abovedisplayskip
   \abovedisplayshortskip=\z@\@plus 3\p@
   \belowdisplayshortskip=\p@\@plus 3\p@\@minus\p@
}

\renewcommand\small{%
   \@setfontsize\small\@ixpt{11}%
   \abovedisplayskip=2.5\p@\@plus 2.5\p@\@minus\p@
   \belowdisplayskip=\abovedisplayskip
   \abovedisplayshortskip=\z@\@plus 2\p@
   \belowdisplayshortskip=\p@\@plus 2\p@\@minus\p@
}
\renewcommand\footnotesize{%
    \@setfontsize\footnotesize\@viiipt{9.5}%
    \abovedisplayskip=3\p@\@plus 3\p@\@minus\p@
    \belowdisplayskip=\abovedisplayskip
    \abovedisplayshortskip=\z@\@plus 3\p@
    \belowdisplayshortskip=\p@\@plus 3\p@\@minus\p@
}
\def\@listi{%
  \leftmargin\leftmargini\parsep=\p@\@plus\p@\@minus\p@
  \itemsep=\parsep
  \listparindent=1em
  }

\def\@listii{%
  \leftmargin\leftmarginii
  \labelwidth=\leftmarginii \advance\labelwidth-\labelsep
  \topsep=2\p@\@plus\p@\@minus\p@
  \parsep=\p@\@plus\p@\@minus\p@
  \itemsep=\parsep
  \listparindent=1em
  }

\def\@listiii{%
  \leftmargin=\leftmarginiii
  \labelwidth=\leftmarginiii \advance\labelwidth-\labelsep
  \topsep=\p@\@plus\p@\@minus\p@
  \parsep=\z@
  \itemsep=\topsep
  \listparindent=1em
  }
\def\quote{\list{}{\rightmargin.5\leftmargin}\item[]}
\renewcommand{\quotation}{\list{}{\listparindent 1.5em
     \rightmargin.5\leftmargin\parsep \z@\@plus\p@}\item[]}
\let\@TB@verbatim\@verbatim
\let\@TBverbatim\verbatim
\let\@TBendverbatim\endverbatim
\def\verbatim{\futurelet\reserved@a\@switch@sqbverbatim}
\def\@switch@sqbverbatim{\ifx\reserved@a[%]
  \expandafter\@sqbverbatim\else
  \def\reserved@b{\@sqbverbatim[]}\expandafter\reserved@b\fi}
\def\@sqbverbatim[#1]{%
  \def\ruled{\@ruledtrue}%
  #1\@TBverbatim}
\def\@verbatim{\if@ruled\kern5\p@\trivlist\item\hrule\kern5\p@\nobreak\fi
  \@TB@verbatim}
\def\endverbatim{\@TBendverbatim
  \if@ruled\kern5\p@\hrule\endtrivlist\kern5\p@\fi}
\newif\if@ruled
\@ruledfalse
\if@Harvardcite
\let\@internalcite\cite
\def\cite{\def\@citeseppen{-1000}%
    \def\@cite##1##2{(##1\if@tempswa , ##2\fi)}%
    \def\citeauthoryear##1##2##3{##1, ##3}\@internalcite}
\def\citeNP{\def\@citeseppen{-1000}%
    \def\@cite##1##2{##1\if@tempswa , ##2\fi}%
    \def\citeauthoryear##1##2##3{##1, ##3}\@internalcite}
\def\citeN{\def\@citeseppen{-1000}%
    \def\@cite##1##2{##1\if@tempswa , ##2)\else{)}\fi}%
    \def\citeauthoryear##1##2##3{##1 (##3}\@citedata}
\def\citeA{\def\@citeseppen{-1000}%
    \def\@cite##1##2{(##1\if@tempswa , ##2\fi)}%
    \def\citeauthoryear##1##2##3{##1}\@internalcite}
\def\citeANP{\def\@citeseppen{-1000}%
    \def\@cite##1##2{##1\if@tempswa , ##2\fi}%
    \def\citeauthoryear##1##2##3{##1}\@internalcite}
\def\shortcite{\def\@citeseppen{-1000}%
    \def\@cite##1##2{(##1\if@tempswa , ##2\fi)}%
    \def\citeauthoryear##1##2##3{##2, ##3}\@internalcite}
\def\shortciteNP{\def\@citeseppen{-1000}%
    \def\@cite##1##2{##1\if@tempswa , ##2\fi}%
    \def\citeauthoryear##1##2##3{##2 ##3}\@internalcite}
\def\shortciteN{\def\@citeseppen{-1000}%
    \def\@cite##1##2{##1\if@tempswa , ##2)\else{)}\fi}%
    \def\citeauthoryear##1##2##3{##2 (##3}\@citedata}
\def\shortciteA{\def\@citeseppen{-1000}%
    \def\@cite##1##2{(##1\if@tempswa , ##2\fi)}%
    \def\citeauthoryear##1##2##3{##2}\@internalcite}
\def\shortciteANP{\def\@citeseppen{-1000}%
    \def\@cite##1##2{##1\if@tempswa , ##2\fi}%
    \def\citeauthoryear##1##2##3{##2}\@internalcite}
\def\citeyear{\def\@citeseppen{-1000}%
    \def\@cite##1##2{(##1\if@tempswa , ##2\fi)}%
    \def\citeauthoryear##1##2##3{##3}\@citedata}
\def\citeyearNP{\def\@citeseppen{-1000}%
    \def\@cite##1##2{##1\if@tempswa , ##2\fi}%
    \def\citeauthoryear##1##2##3{##3}\@citedata}
\def\@citedata{%
        \@ifnextchar [{\@tempswatrue\@citedatax}%
                                  {\@tempswafalse\@citedatax[]}%
}

\def\@citedatax[#1]#2{%
\if@filesw\immediate\write\@auxout{\string\citation{#2}}\fi%
  \def\@citea{}\@cite{\@for\@citeb:=#2\do%
    {\@citea\def\@citea{, }\@ifundefined% by Young
       {b@\@citeb}{{\bf ?}%
       \@warning{Citation `\@citeb' on page \thepage \space undefined}}%
{\csname b@\@citeb\endcsname}}}{#1}}%
\def\@citex[#1]#2{%
\if@filesw\immediate\write\@auxout{\string\citation{#2}}\fi%
  \def\@citea{}\@cite{\@for\@citeb:=#2\do%
    {\@citea\def\@citea{; }\@ifundefined% by Young
       {b@\@citeb}{{\bf ?}%
       \@warning{Citation `\@citeb' on page \thepage \space undefined}}%
{\csname b@\@citeb\endcsname}}}{#1}}%
\def\@biblabel#1{}
\newlength{\bibhang}
\setlength{\bibhang}{2em}
\newdimen\bibindent
\bibindent=1.5em
\@ifundefined{refname}%
   {\newcommand{\refname}{References}}%
   {}%
\def\thebibliography#1{\section*{\refname\@mkboth
  {\uppercase{\refname}}{\uppercase{\refname}}}\list
  {[\arabic{enumi}]}{%
  \labelwidth\z@ \labelsep\z@
  \leftmargin\bibindent
  \itemindent -\bibindent
  \listparindent \itemindent
  \parsep \z@
  \usecounter{enumi}}
  \def\newblock{}
  \sloppy
  \sfcode`\.=1000\relax}
\def\etal{et\,al.\@}
\def\bibentry{\smallskip
              \hangindent=\parindent
              \hangafter=1
              \noindent
              \sloppy
              \clubpenalty500 \widowpenalty500
              \frenchspacing}
\def\bibliography#1{%
  \if@filesw\immediate\write\@auxout{\string\bibdata{\@tubfilename{#1}}}\fi
  \@input{\jobname.bbl}}

\def\bibliographystyle#1{\if@filesw\immediate\write\@auxout
    {\string\bibstyle{\@tubfilename{#1}}}\fi}

\fi % matching \if@Harvardcite
\def\HorzR@gisterRule{\vrule \@height 0.2\p@ \@depth\z@ \@width 0.5in }
\def\DownShortR@gisterRule{\vrule \@height 0.2\p@ \@depth 1pc \@width 0.2\p@ }
\def\UpShortR@gisterRule{\vrule \@height 1pc \@depth\z@ \@width 0.2\p@ }
\def\ttopregister{\dlap{%
        \hb@xt@\trimwd{\HorzR@gisterRule \hfil \HorzR@gisterRule
                        \HorzR@gisterRule \hfil \HorzR@gisterRule}%
        \hb@xt@\trimwd{\hfil \DownShortR@gisterRule \hfil}}}
\def\tbotregister{\ulap{%
        \hb@xt@\trimwd{\hfil \UpShortR@gisterRule \hfil}%
        \hb@xt@\trimwd{\HorzR@gisterRule \hfil \HorzR@gisterRule
                        \HorzR@gisterRule \hfil \HorzR@gisterRule}}}
\def\topregister{\ttopregister}
\def\botregister{\tbotregister}
\def \rtitlex{\def\texttub##1{{\normalsize\textrm{##1}}}\TUB, \volx }

\def\PrelimDraftfooter{%
  \dlap{\kern\textheight\kern3pc
        \rlap{\hb@xt@\pagewd{\midrtitle\hfil\midrtitle}}
  }}

\def\MakeRegistrationMarks{}
\def\UseTrimMarks{%
  \def\MakeRegistrationMarks{%
    \ulap{\rlap{%
       \vbox{\dlap{\vbox to\trimlgt{\vfil\botregister}}%
             \topregister\vskip \headmargin \vskip 10\p@}}}}%
  }

\def\@oddhead{\MakeRegistrationMarks\PrelimDraftfooter
  \normalsize\csname normalshape\endcsname\rm
  \rtitlex\qquad\midrtitle \hfil \thepage}
\def\@evenhead{\MakeRegistrationMarks\PrelimDraftfooter
  \normalsize\csname normalshape\endcsname\rm
  \thepage\hfil\midrtitle\qquad\rtitlex}
\def\@oddfoot{}
\def\@evenfoot{}
\def\ps@headings{}
\pagestyle{headings}
\def\@outputdblcol{\if@firstcolumn \global\@firstcolumnfalse
    \global\setbox\@leftcolumn\box\@outputbox
    \global\brokenpenalty10000
  \else \global\@firstcolumntrue
    \global\brokenpenalty100
    \setbox\@outputbox\vbox{\hb@xt@\textwidth{\hb@xt@\columnwidth
      {\box\@leftcolumn \hss}\hfil \vrule \@width\columnseprule\hfil
       \hb@xt@\columnwidth{\box\@outputbox \hss}}}\@combinedblfloats
       \@outputpage \begingroup \@dblfloatplacement \@startdblcolumn
       \@whilesw\if@fcolmade \fi{\@outputpage\@startdblcolumn}\endgroup
    \fi}
\newif\ifFirstPar       \FirstParfalse
\def\smc{\sc}
\def\ninepoint{\small}
\DeclareRobustCommand\SMC{%
  \ifx\@currsize\normalsize\small\else
   \ifx\@currsize\small\footnotesize\else
    \ifx\@currsize\footnotesize\scriptsize\else
     \ifx\@currsize\large\normalsize\else
      \ifx\@currsize\Large\large\else
       \ifx\@currsize\LARGE\Large\else
        \ifx\@currsize\scriptsize\tiny\else
         \ifx\@currsize\tiny\tiny\else
          \ifx\@currsize\huge\LARGE\else
           \ifx\@currsize\Huge\huge\else
            \small\SMC@unknown@warning
 \fi\fi\fi\fi\fi\fi\fi\fi\fi\fi
}
\newcommand\SMC@unknown@warning{\TBWarning{Unknown text font size command
                                           -- using \string\small}}
\newcommand\textSMC[1]{{\SMC #1}}
\newcommand\acro[1]{\textSMC{#1}\@}
\def\xEdNote{{\tenuit Editor's note:\enspace }}
\def \EdNote{{\tenuit Editor's note:\enspace }}
\def\SelfDocumenting{%
  \setlength\textwidth{31pc}
  \onecolumn
  \parindent \z@
  \parskip 2\p@\@plus\p@\@minus\p@
  \oddsidemargin 8pc
  \evensidemargin 8pc
  \marginparwidth 8pc
  \toks@\expandafter{\@oddhead}%
  \xdef\@oddhead{\hss\hb@xt@\pagewd{\the\toks@}}%
  \toks@\expandafter{\@evenhead}%
  \xdef\@evenhead{\hss\hb@xt@\pagewd{\the\toks@}}%
  \def\ps@titlepage{}%
}
\def\ps@titlepage{}

\long\def\@makefntext#1{\parindent 1em\noindent\hb@xt@2em{}%
  \llap{\@makefnmark}\null$\mskip5mu$#1}

\def\fnum@figure{{\bf Figure \thefigure}}
\AtBeginDocument{%
  \bibliographystyle{ltugbib}
}
\everypar{\@nodocument}%
\authornumber\z@
\let\@signature\@defaultsignature
\InputIfFileExists{ltugboat.cfg}{\ClassInfo{tugboat}{Loading local
                                           configuration information}}{}
\endinput
%% 
%% End of file `ltugboat.cls'.