Elsarticle.cls

Introduction

`elsarticle.cls` is a thoroughly re-written document class for formatting LaTeX submissions to Elsevier journals. The class uses the environments and commands defined in LaTeX kernel without change to the signature so that clashes with other contributed LaTeX packages like `hyperref.sty`, `preview-latex.sty`, etc., will be minimal. `elsarticle.cls` is primarily built upon the default `article.cls`. The class depends on the following packages for its proper functionality:

1. `pifont.sty` for openstar in the title footnotes.
2. `natbib.sty` for citation processing.
3. `geometry.sty` for margin settings.
4. `fleqn.clo` for left aligned equations.
5. `graphicx.sty` for graphics inclusion.
6. `txfonts.sty` optional font package, if document is to be formatted with Times and compatible math fonts.
7. `hyperref.sty` optional packages if hyper linking is required in the document.

All the above packages are part of any standard LaTeX installation. Therefore, the users need not be bothered about downloading any extra packages. Further, users are free to make use of \textsc{ams} math packages like, `amsmath.sty`, `amsthm.sty`, `amssymb.sty`, `amsfonts.sty`, etc., if they want. All these packages work in tandem with `elsarticle.cls` without any problems.

Major Differences

Following are the major differences between `elsarticle.cls` and its predecesor package, `elsart.cls`:

• `elsarticle.cls` is built upon `article.cls` while `elsart.cls` is not. `elsart.cls` redefines many of the commands in the LaTeX classes/kernel, which can possibly cause surprising clashes with other contributed LaTeX packages.
• Provides preprint document formatting by default, and optionally formats the document as per the final style of models `1+`, `3+` and `5+` of Elsevier journals.
• Some easier hooks for formatting `list` and `theorem` environments are provided while people can still use `amsthm.sty` package.
• `natbib.sty` is the main citation processing package which can comprehensively handle all kinds of citations and works perfectly with `hyperref.sty` in combination with `hypernat.sty`.
• Long title pages are processed correctly in preprint and final formats.

Installation

The package is available at author resources page at Elsevier Science. It can also be found in any of the nodes of the Comprehensive TeX Archive Network (CTAN), one of the primary nodes being http://www.ctan.org. Please grab the `elsarticle.dtx` which is the composite class with documentation and `elsarticle.ins` which is the LaTeX installer file. When we compile the `elsarticle.ins` with LaTeX it provides the class file, `elsarticle.cls` by stripping off all the documentation from the `*.dtx` file. The class may be moved or copied to a place, usually, `\$TEXMF/tex/latex/elsevier/`, or a folder which will be read by LaTeX during document compilation. The TeX file database needs updation after moving/copying class file. Usually, we use commands like `mktexlsr` or `texhash` depending upon the distribution and operating system.

Usage

The class should be loaded with the command: <geshi lang="latex">

```\documentclass[<options>]{elsarticle}
```

</geshi> where the `options` can be the following:

`preprint`
default options which formats the document for submission to Elsevier journals.
`review`
similar to </code>preprint</code> option, but increases the baselineskip to facilitate easier review process.
`1p`
formats to the look and feel of the final format of model 1+ journals. This is always single column style.
`3p`
formats to the look and feel of the final format of model 3+ journals. If the journal is a two column model use `twocolumn` option in combination.
`5p`
formats for model 5+ journals. This is always two column style.
`authoryear`
author-year citation style of `natbib.sty`. If you want to add extra options of `natbib.sty`, you may use the options as a comma delimited strings as argument to `\biboptions` command. An example would be:

<geshi lang="latex">

```\biboptions{longnamesfirst,angle,semicolon}
```

</geshi>

`number`
numbered citation style. Extra options can be loaded with `\biboptions` command.
`longtitle`
if front matter is unusually long, use this option to split the title page across pages with correct placing of title and author footnotes in the first page.
`times`
loads `txfonts.sty` if available in the system to use Times and compatible math fonts.
• All options of `article.cls` can be used with this document class.
• The default options loaded are `a4paper`, `10pt`, `oneside`, `onecolumn` and `preprint`.