elsarticle/doc/elsdoc.tex
author Alpar Juttner <alpar@cs.elte.hu>
Wed, 30 Nov 2016 22:45:35 +0100
changeset 24 bdf97dafabfb
permissions -rw-r--r--
New title and abstract
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%% 
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%% Copyright 2007, 2008, 2009 Elsevier Ltd
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%% 
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%% This file is part of the 'Elsarticle Bundle'.
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%% ---------------------------------------------
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%% 
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%% It may be distributed under the conditions of the LaTeX Project Public
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%% License, either version 1.2 of this license or (at your option) any
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%% later version.  The latest version of this license is in
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%%    http://www.latex-project.org/lppl.txt
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%% and version 1.2 or later is part of all distributions of LaTeX
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%% version 1999/12/01 or later.
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%% 
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%% The list of all files belonging to the 'Elsarticle Bundle' is
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%% given in the file `manifest.txt'.
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%% 
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\documentclass[a4paper,12pt]{article}
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\usepackage[xcolor,qtwo]{rvdtx}
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\usepackage{multicol}
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\usepackage{color}
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\usepackage{xspace}
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\usepackage{pdfwidgets}
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\usepackage{enum}
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\def\ttdefault{cmtt}
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\headsep4pc
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\makeatletter
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\def\bs{\expandafter\@gobble\string\\}
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\def\lb{\expandafter\@gobble\string\{}
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\def\rb{\expandafter\@gobble\string\}}
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\def\@pdfauthor{C.V.Radhakrishnan}
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\def\@pdftitle{elsarticle.cls -- A documentation}
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\def\@pdfsubject{Document formatting with elsarticle.cls}
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\def\@pdfkeywords{LaTeX, Elsevier Ltd, document class}
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\def\file#1{\textsf{#1}\xspace}
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%\def\LastPage{19}
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\DeclareRobustCommand{\LaTeX}{L\kern-.26em%
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        {\sbox\z@ T%
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         \vbox to\ht\z@{\hbox{\check@mathfonts
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           \fontsize\sf@size\z@
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           \math@fontsfalse\selectfont
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          A\,}%
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         \vss}%
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        }%
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     \kern-.15em%
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    \TeX}
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\makeatother
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\def\figurename{Clip}
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\begin{document}
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\def\testa{This is a specimen document. }
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\def\testc{\testa\testa\testa\testa}
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\def\testb{\testc\testc\testc\testc\testc}
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\long\def\test{\testb\par\testb\par\testb\par}
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\pinclude{\copy\contbox\printSq{\LastPage}}
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\title{elsarticle.cls -- A better way to format your document}
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\author{Elsevier Ltd}
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\contact{elsarticle@river-valley.com}
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\version{1.20}
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\date{\today}
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\maketitle
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\section{Introduction}
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%\hypertarget{introduction}{}
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\file{elsarticle.cls} is a thoroughly re-written document class
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for formatting \LaTeX{} submissions to Elsevier journals.
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The class uses the environments and commands defined in \LaTeX{} kernel
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without any change in the signature so that clashes with other
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contributed \LaTeX{} packages such as \file{hyperref.sty},
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\file{preview-latex.sty}, etc., will be minimal.
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\file{elsarticle.cls} is primarily built upon the default
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\file{article.cls}.  This class depends on the following packages
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for its proper functioning:
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\begin{enumerate}
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\item \file{pifont.sty} for openstar in the title footnotes;
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\item \file{natbib.sty} for citation processing;
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\item \file{geometry.sty} for margin settings;
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\item \file{fleqn.clo} for left aligned equations;
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\item \file{graphicx.sty} for graphics inclusion;
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\item \file{txfonts.sty} optional font package, if the document is to
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  be formatted with Times and compatible math fonts;
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\item \file{hyperref.sty} optional packages if hyperlinking is
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  required in the document.
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\end{enumerate}
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All the above packages are part of any standard \LaTeX{} installation.
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Therefore, the users need not be bothered about downloading any
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extra packages.  Furthermore, users are free to make use of \textsc{ams}
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math packages such as \file{amsmath.sty}, \file{amsthm.sty},
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\file{amssymb.sty}, \file{amsfonts.sty}, etc., if they want to.  All
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these packages work in tandem with \file{elsarticle.cls} without
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any problems.
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\section{Major Differences}
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%\hypertarget{majordifferences}{}
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Following are the major differences between \file{elsarticle.cls}
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and its predecessor package, \file{elsart.cls}:
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\begin{enumerate}[\textbullet]
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\item \file{elsarticle.cls} is built upon \file{article.cls}
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while \file{elsart.cls} is not. \file{elsart.cls} redefines
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many of the commands in the \LaTeX{} classes/kernel, which can
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possibly cause surprising clashes with other contributed
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\LaTeX{} packages;
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\item provides preprint document formatting by default, and
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optionally formats the document as per the final
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style of models $1+$, $3+$ and $5+$ of Elsevier journals;
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\item some easier ways for formatting \verb+list+ and
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\verb+theorem+ environments are provided while people can still
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use \file{amsthm.sty} package;
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\item \file{natbib.sty} is the main citation processing package
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  which can comprehensively handle all kinds of citations and
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works perfectly with \file{hyperref.sty} in combination with
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\file{hypernat.sty};
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\item long title pages are processed correctly in preprint and
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  final formats.
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\end{enumerate}
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\section{Installation}
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%\hypertarget{installation}{}
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The package is available at author resources page at Elsevier
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(\url{http://www.elsevier.com/locate/latex}).
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It can also be found in any of the nodes of the Comprehensive
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\TeX{} Archive Network (\textsc{ctan}), one of the primary nodes
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being
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\url{http://www.ctan.org/tex-archive/macros/latex/contrib/elsevier/}.
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Please download the \file{elsarticle.dtx} which is a composite
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class with documentation and \file{elsarticle.ins} which is the
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\LaTeX{} installer file. When we compile the
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\file{elsarticle.ins} with \LaTeX{} it provides the class file,
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\file{elsarticle.cls} by
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stripping off all the documentation from the \verb+*.dtx+ file.
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The class may be moved or copied to a place, usually,
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\verb+$TEXMF/tex/latex/elsevier/+, %$%%%%%%%%%%%%%%%%%%%%%%%%%%%%
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or a folder which will be read                   
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by \LaTeX{} during document compilation.  The \TeX{} file
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database needs updation after moving/copying class file.  Usually,
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we use commands like \verb+mktexlsr+ or \verb+texhash+ depending
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upon the distribution and operating system.
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\section{Usage}\label{sec:usage}
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%\hypertarget{usage}{}
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The class should be loaded with the command:
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\begin{vquote}
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 \documentclass[<options>]{elsarticle}
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\end{vquote}
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\noindent where the \verb+options+ can be the following:
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\begin{description}
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\item [{\tt\color{verbcolor} preprint}]  default option which format the
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  document for submission to Elsevier journals.
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\item [{\tt\color{verbcolor} review}]  similar to the \verb+preprint+ option, but
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  increases the baselineskip to facilitate easier review process.
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\item [{\tt\color{verbcolor} 1p}]  formats the article to the look and feel of the final
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  format of model 1+ journals. This is always single column style.
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\item [{\tt\color{verbcolor} 3p}] formats the article to the look and feel of the final
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  format of model 3+ journals. If the journal is a two column
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model, use \verb+twocolumn+ option in combination.
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\item [{\tt\color{verbcolor} 5p}] formats for model 5+ journals. This is always
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  of two column style.
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\item [{\tt\color{verbcolor} authoryear}] author-year citation style of
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  \file{natbib.sty}. If you want to add extra options of
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\file{natbib.sty}, you may use the options as comma delimited
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strings as arguments to \verb+\biboptions+ command. An example
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would be:
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\end{description}
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\begin{vquote}
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 \biboptions{longnamesfirst,angle,semicolon}
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\end{vquote}
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\begin{description}
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\item [{\tt\color{verbcolor} number}] numbered citation style. Extra options
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  can be loaded with\linebreak \verb+\biboptions+ command.
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\item [{\tt\color{verbcolor} sort\&compress}] sorts and compresses the
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numbered citations. For example, citation [1,2,3] will become [1--3].
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\item [{\tt\color{verbcolor} longtitle}] if front matter is unusually long, use
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  this option to split the title page across pages with the correct
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placement of title and author footnotes in the first page.
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\item [{\tt\color{verbcolor} times}] loads \file{txfonts.sty}, if available in
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  the system to use Times and compatible math fonts.
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\item[] All options of \file{article.cls} can be used with this
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  document class.
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\item[] The default options loaded are \verb+a4paper+, \verb+10pt+,
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  \verb+oneside+, \verb+onecolumn+ and \verb+preprint+.
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\end{description}
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\section{Frontmatter}
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%\hypertarget{preamble}{}
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There are two types of frontmatter coding:
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\begin{enumerate}[(1)]
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\item each author is
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connected to an affiliation with a footnote marker; hence all
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authors are grouped together and affiliations follow;
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\item authors of same affiliations are grouped together and the
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relevant affiliation follows this group. An example coding of the first
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type is provided below.
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\end{enumerate}
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\begin{vquote}
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 \title{This is a specimen title\tnoteref{t1,t2}}
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 \tnotetext[t1]{This document is a collaborative effort.}
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 \tnotetext[t2]{The second title footnote which is a longer
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    longer than the first one and with an intention to fill
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    in up more than one line while formatting.}
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\end{vquote}
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\begin{vquote}
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 \author[rvt]{C.V.~Radhakrishnan\corref{cor1}\fnref{fn1}}
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 \ead{cvr@river-valley.com}
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 \author[rvt,focal]{K.~Bazargan\fnref{fn2}}
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 \ead{kaveh@river-valley.com}
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 \author[els]{S.~Pepping\corref{cor2}\fnref{fn1,fn3}}
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 \ead[url]{http://www.elsevier.com}
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\end{vquote}
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\begin{vquote}
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 \cortext[cor1]{Corresponding author}
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 \cortext[cor2]{Principal corresponding author}
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 \fntext[fn1]{This is the specimen author footnote.}
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 \fntext[fn2]{Another author footnote, but a little more 
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             longer.}
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 \fntext[fn3]{Yet another author footnote. Indeed, you can have
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    any number of author footnotes.}
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 \address[rvt]{River Valley Technologies, SJP Building,
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    Cotton Hills, Trivandrum, Kerala, India 695014}
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 \address[focal]{River Valley Technologies, 9, Browns Court,
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    Kennford, Exeter, United Kingdom}
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 \address[els]{Central Application Management,
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    Elsevier, Radarweg 29, 1043 NX\\
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    Amsterdam, Netherlands}
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\end{vquote}
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The output of the above TeX source is given in Clips~\ref{clip1} and
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\ref{clip2}. The header portion or title area is given in Clip~\ref{clip1} and
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the footer area is given in Clip~\ref{clip2}.
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\vspace*{6pt}
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\def\rulecolor{blue!70}
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\src{Header of the title page.}
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\includeclip{1}{132 571 481 690}{els1.pdf}
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\def\rulecolor{orange}
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%\vspace*{6pt}
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\def\rulecolor{blue!70}
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\src{Footer of the title page.}
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\includeclip{1}{122 129 481 237}{els1.pdf}
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\def\rulecolor{orange}
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\pagebreak
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Most of the commands such as \verb+\title+, \verb+\author+,
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\verb+\address+ are self explanatory.  Various components are
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linked to each other by a label--reference mechanism; for
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instance, title footnote is linked to the title with a footnote
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mark generated by referring to the \verb+\label+ string of
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the \verb=\tnotetext=.  We have used similar commands
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such as \verb=\tnoteref= (to link title note to title);
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\verb=\corref= (to link corresponding author text to
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corresponding author); \verb=\fnref= (to link footnote text to
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the relevant author names).  \TeX{} needs two compilations to
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resolve the footnote marks in the preamble part.  
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Given below are the syntax of various note marks and note texts.
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\begin{vquote}
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  \tnoteref{<label(s)>}
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  \corref{<label(s)>}
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  \fnref{<label(s)>}
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  \tnotetext[<label>]{<title note text>}
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  \cortext[<label>]{<corresponding author note text>}
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  \fntext[<label>]{<author footnote text>}
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\end{vquote}
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\noindent where \verb=<label(s)>= can be either one or more comma
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delimited label strings. The optional arguments to the
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\verb=\author= command holds the ref label(s) of the address(es)
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to which the author is affiliated while each \verb=\address=
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command can have an optional argument of a label. In the same
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manner, \verb=\tnotetext=, \verb=\fntext=, \verb=\cortext= will
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have optional arguments as their respective labels and note text
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as their mandatory argument.
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The following example code provides the markup of the second type
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of author-affiliation.
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%as seen in the output given in the
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%box to the right.
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%\pinclude{\def\rulecolor{blue!80}
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%   \includeclip[width=3.25in]{1}{130 84 484 676}{els2.pdf}%
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% \def\rulecolor{orange}}
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\begin{vquote}
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\author{C.V.~Radhakrishnan\corref{cor1}\fnref{fn1}}
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 \ead{cvr@river-valley.com}
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 \address{River Valley Technologies, SJP Building,
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   Cotton Hills, Trivandrum, Kerala, India 695014}
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\end{vquote}
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\begin{vquote}
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\author{K.~Bazargan\fnref{fn2}}
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 \ead{kaveh@river-valley.com}
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 \address{River Valley Technologies, 9, Browns Court, Kennford,
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   Exeter, UK.}
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\end{vquote}
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\begin{vquote}
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\author{S.~Pepping\fnref{fn1,fn3}}
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 \ead[url]{http://www.elsevier.com}
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 \address{Central Application Management,
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   Elsevier, Radarweg 43, 1043 NX Amsterdam, Netherlands}
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\end{vquote}
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\begin{vquote}
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\cortext[cor1]{Corresponding author}
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\fntext[fn1]{This is the first author footnote.}
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\fntext[fn2]{Another author footnote, this is a very long 
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  footnote and it should be a really long footnote. But this 
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  footnote is not yet sufficiently long enough to make two lines 
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  of footnote text.}
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\fntext[fn3]{Yet another author footnote.}
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\end{vquote}
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The output of the above TeX source is given in Clip~\ref{clip3}.
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\vspace*{12pt}
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\def\rulecolor{blue!70}
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\src{Header of the title page..}
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\includeclip{1}{132 491 481 690}{els2.pdf}
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\def\rulecolor{orange}
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The frontmatter part has further environments such as abstracts and
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keywords.  These can be marked up in the following
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manner:
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%\verb+\begin{abstract}+ \dots \verb+\end{abstract}+ and
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%\verb+\begin{keyword}+ \verb+...+ \verb+\end{keyword}+ which
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%contain the abstract and keywords respectively. 
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\begin{vquote}
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 \begin{abstract}
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  In this work we demonstrate the formation of a new type of 
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  polariton on the interface between a ....
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 \end{abstract}
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\end{vquote} 
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\begin{vquote}
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 \begin{keyword}
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  quadruple exiton \sep polariton \sep WGM
alpar@0
   388
alpar@0
   389
  \PACS 71.35.-y \sep 71.35.Lk \sep 71.36.+c
alpar@0
   390
 \end{keyword}
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   391
\end{vquote}
alpar@0
   392
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\noindent Each keyword shall be separated by a \verb+\sep+ command.
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\textsc{pacs} and \textsc{msc} classifications shall be provided in 
alpar@0
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the keyword environment with the commands \verb+\PACS+ and
alpar@0
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\verb+\MSC+ respectively.  \verb+\MSC+ accepts an optional
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argument to accommodate future revisions.
alpar@0
   398
eg., \verb=\MSC[2008]=. The default is 2000.\looseness=-1
alpar@0
   399
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   400
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\section{Floats}
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   402
{Figures} may be included using the command, \verb+\includegraphics+ in
alpar@0
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combination with or without its several options to further control
alpar@0
   404
graphic. \verb+\includegraphics+ is provided by \file{graphic[s,x].sty}
alpar@0
   405
which is part of any standard \LaTeX{} distribution.
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   406
\file{graphicx.sty} is loaded by default. \LaTeX{} accepts figures in
alpar@0
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the postscript format while pdf\LaTeX{} accepts \file{*.pdf},
alpar@0
   408
\file{*.mps} (metapost), \file{*.jpg} and \file{*.png} formats. 
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pdf\LaTeX{} does not accept graphic files in the postscript format. 
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The \verb+table+ environment is handy for marking up tabular
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material. If users want to use \file{multirow.sty},
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\file{array.sty}, etc., to fine control/enhance the tables, they
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   414
are welcome to load any package of their choice and
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\file{elsarticle.cls} will work in combination with all loaded
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packages.
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   417
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\section[Theorem and ...]{Theorem and theorem like environments}
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   419
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\file{elsarticle.cls} provides a few shortcuts to format theorems and
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theorem-like environments with ease. In all commands the options that
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are used with the \verb+\newtheorem+ command will work exactly in the same
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   423
manner. \file{elsarticle.cls} provides three commands to format theorem or
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theorem-like environments: 
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   425
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\begin{vquote}
alpar@0
   427
 \newtheorem{thm}{Theorem}
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   428
 \newtheorem{lem}[thm]{Lemma}
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   429
 \newdefinition{rmk}{Remark}
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   430
 \newproof{pf}{Proof}
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   431
 \newproof{pot}{Proof of Theorem \ref{thm2}}
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   432
\end{vquote}
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   433
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The \verb+\newtheorem+ command formats a
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   435
theorem in \LaTeX's default style with italicized font, bold font
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   436
for theorem heading and theorem number at the right hand side of the
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   437
theorem heading.  It also optionally accepts an argument which
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   438
will be printed as an extra heading in parentheses. 
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   439
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   440
\begin{vquote}
alpar@0
   441
  \begin{thm} 
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   442
   For system (8), consensus can be achieved with $\|T_{\omega z}$
alpar@0
   443
   ...
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   444
     \begin{eqnarray}\label{10}
alpar@0
   445
     ....
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   446
     \end{eqnarray}
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   447
  \end{thm}
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   448
\end{vquote}  
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   449
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Clip~\ref{clip4} will show you how some text enclosed between the
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above code looks like:
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   452
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   453
\vspace*{6pt}
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   454
\def\rulecolor{blue!70}
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   455
\src{{\ttfamily\color{verbcolor}\bs newtheorem}}
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   456
\includeclip{2}{1 1 453 120}{jfigs.pdf}
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   457
\def\rulecolor{orange}
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   458
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   459
The \verb+\newdefinition+ command is the same in
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   460
all respects as its\linebreak \verb+\newtheorem+ counterpart except that
alpar@0
   461
the font shape is roman instead of italic.  Both
alpar@0
   462
\verb+\newdefinition+ and \verb+\newtheorem+ commands
alpar@0
   463
automatically define counters for the environments defined.
alpar@0
   464
alpar@0
   465
\vspace*{12pt}
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   466
\def\rulecolor{blue!70}
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   467
\src{{\ttfamily\color{verbcolor}\bs newdefinition}}
alpar@0
   468
\includeclip{1}{1 1 453 105}{jfigs.pdf}
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   469
\def\rulecolor{orange}
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   470
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   471
The \verb+\newproof+ command defines proof environments with
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   472
upright font shape.  No counters are defined. 
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   473
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   474
\vspace*{6pt}
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   475
\def\rulecolor{blue!70}
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   476
\src{{\ttfamily\color{verbcolor}\bs newproof}}
alpar@0
   477
\includeclip{3}{1 1 453 65}{jfigs.pdf}
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   478
\def\rulecolor{orange}
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   479
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   480
Users can also make use of \verb+amsthm.sty+ which will override
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   481
all the default definitions described above.
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   482
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   483
\section[Enumerated ...]{Enumerated and Itemized Lists}
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   484
\file{elsarticle.cls} provides an extended list processing macros
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which makes the usage a bit more user friendly than the default
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\LaTeX{} list macros.   With an optional argument to the
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   487
\verb+\begin{enumerate}+ command, you can change the list counter
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   488
type and its attributes.
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   489
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\begin{vquote}
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   491
 \begin{enumerate}[1.]
alpar@0
   492
 \item The enumerate environment starts with an optional
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   493
   argument `1.', so that the item counter will be suffixed
alpar@0
   494
   by a period.
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   495
 \item You can use `a)' for alphabetical counter and '(i)' for
alpar@0
   496
   roman counter.
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   497
  \begin{enumerate}[a)]
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   498
    \item Another level of list with alphabetical counter.
alpar@0
   499
    \item One more item before we start another.
alpar@0
   500
    \begin{enumerate}[(i)]
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   501
     \item This item has roman numeral counter.
alpar@0
   502
     \item Another one before we close the third level.
alpar@0
   503
    \end{enumerate}
alpar@0
   504
    \item Third item in second level.
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   505
  \end{enumerate}
alpar@0
   506
 \item All list items conclude with this step.
alpar@0
   507
 \end{enumerate}
alpar@0
   508
\end{vquote}
alpar@0
   509
alpar@0
   510
\vspace*{12pt}
alpar@0
   511
\def\rulecolor{blue!70}
alpar@0
   512
\src{List -- Enumerate}
alpar@0
   513
\includeclip{4}{1 1 453 185}{jfigs.pdf}
alpar@0
   514
\def\rulecolor{orange}
alpar@0
   515
alpar@0
   516
alpar@0
   517
Further, the enhanced list environment allows one to prefix a
alpar@0
   518
string like `step' to all the item numbers.  Take a look at the
alpar@0
   519
example below:
alpar@0
   520
alpar@0
   521
\begin{vquote}
alpar@0
   522
 \begin{enumerate}[Step 1.]
alpar@0
   523
  \item This is the first step of the example list.
alpar@0
   524
  \item Obviously this is the second step.
alpar@0
   525
  \item The final step to wind up this example.
alpar@0
   526
 \end{enumerate}
alpar@0
   527
\end{vquote}
alpar@0
   528
alpar@0
   529
\def\rulecolor{blue!70}
alpar@0
   530
\src{List -- enhanced}
alpar@0
   531
\includeclip{5}{1 1 313 83}{jfigs.pdf}
alpar@0
   532
\def\rulecolor{orange}
alpar@0
   533
alpar@0
   534
\vspace*{-18pt}
alpar@0
   535
alpar@0
   536
\section{Cross-references}
alpar@0
   537
In electronic publications, articles may be internally
alpar@0
   538
hyperlinked. Hyperlinks are generated from proper
alpar@0
   539
cross-references in the article.  For example, the words
alpar@0
   540
\textcolor{black!80}{Fig.~1} will never be more than simple text,
alpar@0
   541
whereas the proper cross-reference \verb+\ref{tiger}+ may be
alpar@0
   542
turned into a hyperlink to the figure itself:
alpar@0
   543
\textcolor{blue}{Fig.~1}.  In the same way,
alpar@0
   544
the words \textcolor{blue}{Ref.~[1]} will fail to turn into a
alpar@0
   545
hyperlink; the proper cross-reference is \verb+\cite{Knuth96}+.
alpar@0
   546
Cross-referencing is possible in \LaTeX{} for sections,
alpar@0
   547
subsections, formulae, figures, tables, and literature
alpar@0
   548
references.
alpar@0
   549
alpar@0
   550
\section[Mathematical ...]{Mathematical symbols and formulae}
alpar@0
   551
alpar@0
   552
Many physical/mathematical sciences authors require more
alpar@0
   553
mathematical symbols than the few that are provided in standard
alpar@0
   554
\LaTeX. A useful package for additional symbols is the
alpar@0
   555
\file{amssymb} package, developed by the American Mathematical
alpar@0
   556
Society. This package includes such oft-used symbols as
alpar@0
   557
$\lesssim$ (\verb+\lesssim+), $\gtrsim$ (\verb+\gtrsim+)  or 
alpar@0
   558
$\hbar$ (\verb+\hbar+). Note that your \TeX{}
alpar@0
   559
system should have the \file{msam} and \file{msbm} fonts installed. If
alpar@0
   560
you need only a few symbols, such as $\Box$ (\verb+\Box+), you might try the
alpar@0
   561
package \file{latexsym}.
alpar@0
   562
alpar@0
   563
Another point which would require authors' attention is the
alpar@0
   564
breaking up of long equations.  When you use
alpar@0
   565
\file{elsarticle.cls} for formatting your submissions in the 
alpar@0
   566
\verb+preprint+ mode, the document is formatted in single column
alpar@0
   567
style with a text width of 384pt or 5.3in.  When this document is
alpar@0
   568
formatted for final print and if the journal happens to be a double column
alpar@0
   569
journal, the text width will be reduced to 224pt at for 3+
alpar@0
   570
double column and 5+ journals respectively. All the nifty 
alpar@0
   571
fine-tuning in equation breaking done by the author goes to waste in
alpar@0
   572
such cases.  Therefore, authors are requested to check this
alpar@0
   573
problem by typesetting their submissions in final format as well
alpar@0
   574
just to see if their equations are broken at appropriate places,
alpar@0
   575
by changing appropriate options in the document class loading
alpar@0
   576
command, which is explained in section~\ref{sec:usage},
alpar@0
   577
\nameref{sec:usage}. This allows authors to fix any equation breaking
alpar@0
   578
problem before submission for publication.
alpar@0
   579
\file{elsarticle.cls} supports formatting the author submission
alpar@0
   580
in different types of final format.  This is further discussed in
alpar@0
   581
section \ref{sec:final}, \nameref{sec:final}.
alpar@0
   582
alpar@0
   583
\section{Bibliography}
alpar@0
   584
alpar@0
   585
Three bibliographic style files (\verb+*.bst+) are provided ---
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   586
\file{elsarticle-num.bst}, \file{elsarticle-num-names.bst} and
alpar@0
   587
\file{elsarticle-harv.bst} --- the first one for the numbered scheme, the
alpar@0
   588
second for the numbered with new options of \file{natbib.sty} and the
alpar@0
   589
last one for the author year scheme.
alpar@0
   590
alpar@0
   591
In \LaTeX{} literature, references are listed in the
alpar@0
   592
\verb+thebibliography+ environment.  Each reference is a
alpar@0
   593
\verb+\bibitem+ and each \verb+\bibitem+ is identified by a label,
alpar@0
   594
by which it can be cited in the text:
alpar@0
   595
alpar@0
   596
\verb+\bibitem[Elson et al.(1996)]{ESG96}+ is cited as
alpar@0
   597
\verb+\citet{ESG96}+. 
alpar@0
   598
alpar@0
   599
\noindent In connection with cross-referencing and
alpar@0
   600
possible future hyperlinking it is not a good idea to collect
alpar@0
   601
more that one literature item in one \verb+\bibitem+.  The
alpar@0
   602
so-called Harvard or author-year style of referencing is enabled
alpar@0
   603
by the \LaTeX{} package \file{natbib}. With this package the
alpar@0
   604
literature can be cited as follows:
alpar@0
   605
alpar@0
   606
\begin{enumerate}[\textbullet]
alpar@0
   607
\item Parenthetical: \verb+\citep{WB96}+ produces (Wettig \& Brown, 1996).
alpar@0
   608
\item Textual: \verb+\citet{ESG96}+ produces Elson et al. (1996).
alpar@0
   609
\item An affix and part of a reference:
alpar@0
   610
\verb+\citep[e.g.][Ch. 2]{Gea97}+ produces (e.g. Governato et
alpar@0
   611
al., 1997, Ch. 2).
alpar@0
   612
\end{enumerate}
alpar@0
   613
alpar@0
   614
In the numbered scheme of citation, \verb+\cite{<label>}+ is used,
alpar@0
   615
since \verb+\citep+ or \verb+\citet+ has no relevance in the numbered
alpar@0
   616
scheme.  \file{natbib} package is loaded by \file{elsarticle} with
alpar@0
   617
\verb+numbers+ as default option.  You can change this to author-year
alpar@0
   618
or harvard scheme by adding option \verb+authoryear+ in the class
alpar@0
   619
loading command.  If you want to use more options of the \file{natbib}
alpar@0
   620
package, you can do so with the \verb+\biboptions+ command, which is
alpar@0
   621
described in the section \ref{sec:usage}, \nameref{sec:usage}.  For
alpar@0
   622
details of various options of the \file{natbib} package, please take a
alpar@0
   623
look at the \file{natbib} documentation, which is part of any standard
alpar@0
   624
\LaTeX{} installation.
alpar@0
   625
alpar@0
   626
\subsection*{Displayed equations and double column journals}
alpar@0
   627
alpar@0
   628
Many Elsevier journals print their text in two columns. Since
alpar@0
   629
the preprint layout uses a larger line width than such columns,
alpar@0
   630
the formulae are too wide for the line width in print. Here is an
alpar@0
   631
example of an equation  (see equation 6) which is perfect in a
alpar@0
   632
single column preprint format:
alpar@0
   633
alpar@0
   634
\bigskip
alpar@0
   635
\setlength\Sep{6pt}
alpar@0
   636
\src{See equation (6)}
alpar@0
   637
\def\rulecolor{blue!70}
alpar@0
   638
\includeclip{4}{134 391 483 584}{els1.pdf}
alpar@0
   639
\def\rulecolor{orange}
alpar@0
   640
                 	
alpar@0
   641
\noindent When this document is typeset for publication in a
alpar@0
   642
model 3+ journal with double columns, the equation will overlap
alpar@0
   643
the second column text matter if the equation is not broken at
alpar@0
   644
the appropriate location.
alpar@0
   645
alpar@0
   646
\vspace*{6pt}
alpar@0
   647
\def\rulecolor{blue!70}
alpar@0
   648
\src{See equation (6) overprints into second column}
alpar@0
   649
\includeclip{3}{61 531 532 734}{els-3pd.pdf}
alpar@0
   650
\def\rulecolor{orange}
alpar@0
   651
alpar@0
   652
\pagebreak
alpar@0
   653
alpar@0
   654
\noindent The typesetter will try to break the equation which
alpar@0
   655
need not necessarily be to the liking of the author or as it
alpar@0
   656
happens, typesetter's break point may be semantically incorrect.
alpar@0
   657
Therefore, authors may check their submissions for the incidence
alpar@0
   658
of such long equations and break the equations at the correct
alpar@0
   659
places so that the final typeset copy will be as they wish.
alpar@0
   660
alpar@0
   661
\section{Final print}\label{sec:final}
alpar@0
   662
alpar@0
   663
The authors can format their submission to the page size and margins
alpar@0
   664
of their preferred journal.  \file{elsarticle} provides four
alpar@0
   665
class options for the same. But it does not mean that using these
alpar@0
   666
options you can emulate the exact page layout of the final print copy. 
alpar@0
   667
\lmrgn=3em
alpar@0
   668
\begin{description}
alpar@0
   669
\item [\texttt{1p}:] $1+$ journals with a text area of
alpar@0
   670
384pt $\times$ 562pt or 13.5cm $\times$ 19.75cm or 5.3in $\times$
alpar@0
   671
7.78in, single column style only.
alpar@0
   672
alpar@0
   673
\item [\texttt{3p}:] $3+$ journals with a text area of 468pt
alpar@0
   674
$\times$ 622pt or 16.45cm $\times$ 21.9cm or 6.5in $\times$
alpar@0
   675
8.6in, single column style.
alpar@0
   676
alpar@0
   677
\item [\texttt{twocolumn}:] should be used along with 3p option if the
alpar@0
   678
journal is $3+$ with the same text area as above, but double column
alpar@0
   679
style. 
alpar@0
   680
alpar@0
   681
\item [\texttt{5p}:] $5+$ with text area of 522pt $\times$
alpar@0
   682
682pt or 18.35cm $\times$ 24cm or 7.22in $\times$ 9.45in,
alpar@0
   683
double column style only.
alpar@0
   684
\end{description}
alpar@0
   685
alpar@0
   686
Following pages have the clippings of different parts of
alpar@0
   687
the title page of different journal models typeset in final
alpar@0
   688
format.
alpar@0
   689
alpar@0
   690
Model $1+$ and $3+$  will have the same look and
alpar@0
   691
feel in the typeset copy when presented in this document. That is
alpar@0
   692
also the case with the double column $3+$ and $5+$ journal article
alpar@0
   693
pages. The only difference will be wider text width of
alpar@0
   694
higher models.  Therefore we will look at the
alpar@0
   695
different portions of a typical single column journal page and
alpar@0
   696
that of a double column article in the final format.
alpar@0
   697
alpar@0
   698
\vspace*{2pc}
alpar@0
   699
alpar@0
   700
\begin{center}
alpar@0
   701
\hypertarget{bsc}{}
alpar@0
   702
\hyperlink{sc}{
alpar@0
   703
{\bf [Specimen single column article -- Click here]}
alpar@0
   704
}
alpar@0
   705
alpar@0
   706
\vspace*{2pc}
alpar@0
   707
alpar@0
   708
\hypertarget{bsc}{}
alpar@0
   709
\hyperlink{dc}{
alpar@0
   710
{\bf [Specimen double column article -- Click here]}
alpar@0
   711
}
alpar@0
   712
\end{center}
alpar@0
   713
alpar@0
   714
\newpage
alpar@0
   715
\vspace*{-2pc}
alpar@0
   716
\src{}\hypertarget{sc}{}
alpar@0
   717
\def\rulecolor{blue!70}
alpar@0
   718
\hyperlink{bsc}{\includeclip{1}{121 81 497 670}{els1.pdf}}
alpar@0
   719
\def\rulecolor{orange}
alpar@0
   720
alpar@0
   721
alpar@0
   722
\newpage
alpar@0
   723
alpar@0
   724
\src{}\hypertarget{dc}{}
alpar@0
   725
\def\rulecolor{blue!70}
alpar@0
   726
\hyperlink{bsc}{\includeclip{1}{55 93 535 738}{els-3pd.pdf}}
alpar@0
   727
\def\rulecolor{orange}
alpar@0
   728
alpar@0
   729
\end{document}