Warning: this is an htmlized version!
The original is here, and
the conversion rules are here.
% (find-angg "LATEX/2019compttest.tex")
% (defun c () (interactive) (find-LATEXsh "pdflatex -record 2019compttest.tex"))
% (defun d () (interactive) (find-pdf-page      "~/LATEX/2019compttest.pdf"))
% (defun d () (interactive) (find-pdftools-page "~/LATEX/2019compttest.pdf"))
% (defun b () (interactive) (find-zsh "bibtex 2019compttest; makeindex 2019compttest"))
% (defun e () (interactive) (find-LATEX "2019compttest.tex"))
% (defun u () (interactive) (find-latex-upload-links "2019compttest"))
% (find-xpdfpage "~/LATEX/2019compttest.pdf")
% (find-sh0 "cp -v  ~/LATEX/2019compttest.pdf /tmp/")
% (find-sh0 "cp -v  ~/LATEX/2019compttest.pdf /tmp/pen/")
%   file:///home/edrx/LATEX/2019compttest.pdf
% http://angg.twu.net/LATEX/2019compttest.pdf

% (find-es "tex" "compositionality")

  issueyear=2018, shorttitle=template]{compositionalityarticle}




\title{Template demonstrating the compositionalityarticle class}
\author{Brendan Fong}

\thanks{You can use the \texttt{\textbackslash{}email},
  \texttt{\textbackslash{}homepage}, and
  \texttt{\textbackslash{}thanks} commands to add additional
  information for the preceding \texttt{\textbackslash{}author}. If
  applicable, this can also be used to indicate that a work has
  previously been published in conference proceedings.}

\affiliation{MIT, Mathematics Department, Boston, USA}
\author{Nina Otter}
\affiliation{UCLA, Mathematics Department, Los Angeles, USA}
\author{Joshua Tan}

\affiliation{University of Oxford, Computer Science Department,
  Oxford, UK}



  In the standard \texttt{onecolumn} layout the abstract is typeset
  above the text. Compositionality also supports a \texttt{twocolumn}
  layout with the abstract as a boldface first paragraph. Both can be
  combined with the \texttt{titlepage} option to obtain a format with
  dedicated title and abstract pages that are not included in the page
  count. This format can be more suitable for long articles. The
  \texttt{abstract} environment can appear both before and after the
  \texttt{\textbackslash{}maketitle} command and calling
  \texttt{\textbackslash{}maketitle} is optional, as long as there is
  an \texttt{abstract}. Both \texttt{abstract} and
  \texttt{\textbackslash{}maketitle} however must be placed after all
  other \texttt{\textbackslash{}author},
  \texttt{\textbackslash{}affiliation}, etc.\ commands. In the
  \texttt{twocolumn} layout and without the \texttt{titlepage} option
  there can be a paragraph directly following the abstract before the
  first section. In \texttt{onecolumn} format or with a dedicated
  \texttt{titlepage}, this should be avoided. Note that clicking the
  title links to the page for the published article on
  In this way readers can easily verify whether a work using the { \tt
    compositionalityarticle} class was actually published in


  \caption{Every figure must have an informative caption and a number.
    The caption can be placed above, below, or to the side of the
    figure, as you see fit. The same applies for tables, boxes, and
    other floating elements.}
See Fig.~\ref{fig:figure1} for an example of how to include figures.
Feel free to place them at the top or bottom of the page, or in the
middle of a paragraph as you see fit. Try to place them on the same
page as the text referring to them. A figure on the first page can
help readers remember and recognize your work more easily.

\section{Sectioning and equations}
Sections, subsections, subsubsections, and paragraphs should be
typeset with the standard LaTeX commands. You can use the standard
commands for equations. For multi-line equations \texttt{align} is
over \texttt{eqnarray}.
  E &= m\,c^2\\
  a^2 + b^2 &= c^2\\
  H\,|\psi\rangle &= E\,|\psi\rangle\\
  (\openone \otimes A)\,(B \otimes \openone) &= A \otimes B

Whether you prefer to refer to equations as Eq.~\eqref{emc},
Equation~\ref{emc}, or just \eqref{emc} is up to you, but please be
consistent and use the \texttt{\textbackslash{}eqref\{\dots\}} command
instead of writing \texttt{(\textbackslash{}ref\{\dots\})}. As a
courtesy for your readers and referees please suppress equation
numbers only if there is a valid reason to do so to not make in
unnecessarily difficult to refer to individual results and steps in

The paragraph is the smallest unit of sectioning. Feel free to end the
paragraph title with a full stop if you find this appropriate.

\subsection{References and footnotes}
Footnotes\footnote{Only use footnotes when appropriate.} appear in the
bottom of the page. Please do not mix them with your references.
Citations to other works should appear in the References section at
the end of the work.

\begin{theorem}[DOI links are required]
  Important: As Compositionality is a member of Crossref, all
  references to works that have a DOI must be hyperlinked according to
  the DOI. Those links must start with \texttt{https://doi.org/}
  (preferred), or \texttt{http://dx.doi.org/}. Direct links to the
  website of the publisher are not sufficient.

This can be achieved in several ways, depending on how you format your
bibliography. Suppose the DOI of an article \cite{examplecitation}
that you want to cite is \texttt{10.22331/idonotexist}. If you are
formating your bibliography manually, you can cite this work using the
following in your \texttt{thebibliography} environment:
  Name Surname,
        \textbf{123}, 123456 (1916).}

\begin{theorem}[One citation per bibitem]
  Important: If you are formatting your bibliography manually, please
  do not group multiple citations into one
  \texttt{\textbackslash{}bibitem}. It is not nice for your readers
  and it screws up our automatic extraction of citations and creates
  superfluous manual work.

We encourage the use of BibTeX to generate your bibliography from the
BibTeX meta-data provided by publishers. For DOI linking to work, the
BibTeX file must contain the \texttt{doi} field as for example in:
  author = {Surname, Name},
  title = {Title},
  journal = {Compositionality},
  volume = {123},
  page = {123456},
  year = {1916},
  doi = {10.22331/idonotexist},

Be advised that \href{http://wiki.lyx.org/BibTeX/Tips}{BibTeX does not
  support unicode characters}. All special characters must be input
via their respective LaTeX commands.

If you are using BibTeX, you can load the \texttt{natbib} package by putting
in the preamble of your document and then use the \texttt{plainnat}
citation style by including your BibTeX bibliography
\texttt{mybibliography.bib} where you want the bibliography to appear
as follows:

The { \tt compositionalityarticle} class automatically detects that
the \texttt{natbib} package was loaded and redefines the
\texttt{\textbackslash{}doi} command to create hyperlinks. This is
likely the easiest option if you are converting from another document

If you want to used BibLaTeX, you can instead add
to the preamble of your document and then output the bibliography with
where appropriate. You then have to upload the .bbl file along with
the other source files when submitting to the arXiv. Due to
incompatibilities between different LaTeX versions we unfortunately
cannot recommend this option until the arXiv has updated its LaTeX
system \cite{biblatexsubmittingtothearxiv}.

The {\tt compositionalityarticle} class automatically detects that
the \texttt{biblatex} package was loaded, sets the default option
\texttt{doi=true} to include the DOI in the bibliography, and declares
a suitable field format to make it a hyperlink. Due to issues with
\texttt{biber} we recommend to use the \texttt{bibtex} backend of

More information on how to get DOI links in your document can be found
on StackExchange
Feel free to change the appearance of citations in any way you like by
using a different \texttt{bibliographystyle} or via the advanced
mechanisms provided by BibLaTeX. The only two requirements are that
citations must uniquely identify the cited work and that they must
contain a DOI hyperlink whenever possible.

To get correct line breaks within links, please add the line 
within the first five lines of your main LaTeX file as suggested by
the arXiv \cite{arxivpdfoutput}.

\section{Unpublished and accepted works}
This class supports the \texttt{unpublished} option which disables all
Compositionality related branding such as the color as well as the
hyperlink in the title. It can be used for works not yet accepted in
Compositionality or that are not intended for submission to
Compositionality. By giving the \texttt{accepted=DD-MM-YYYY} option,
with \texttt{DD-MM-YYYY} the acceptance date, the footnote ``Accepted
in Compositionality on DD-MM-YYYY. Click on title to verify.'' is
added to the bottom of each page to clearly mark works that have been
accepted in Compositionality. Once the work is accepted for
publication you will receive an identifier {\tt article-id} which you
will have to give as the {\tt shortitle=article-id} option (this is
needed for the title hyperlink). Finally, for accepted works you also
have to give the \texttt{issuemonth=month}, as well as
\texttt{issueyear=year} options, where {\tt month} and { \tt year} are
the month and year in which the work was accepted.

\section{Summary section}
Longer articles should include a section that, early on, explains the
main results, their limitations, and assumptions. Depending on the
target audience this section can be used to, for example, present the
main theorem, or provide a summary of the results for a wider

\section{Extra packages}
Compositionality encourages you to load the following extra packages:
If you do not load the \texttt{hyperref} package,
\texttt{compositionalityarticle} automatically loads it for you.
Packages that change font settings, such as \texttt{times} or
\texttt{helvet} should be avoided.

\section{Wide equations}
Very wide equations can be shown expanding over both columns using the
\texttt{widetext} environment. In \texttt{onecolumn} mode, the
\texttt{widetext} environment has no effect.
|\mathrm{AME}(n=6,q=5)\rangle=\sum_{i,j,k=0}^4 |i,j,k,i+j+k,i+2j+3k,i+3j+4k\rangle
To enabled this feature in the \texttt{twocolumn} mode,
\texttt{compositionalityarticle} relies on the package
\texttt{ltxgrid}. Unfortunately this package has a bug that leads to a
sub-optimal placement of extremely long footnotes.

\section{Title information}
You can provide information on authors and affiliations in the common
format also used by \texttt{revtex}:
\author{Author 1}
\author{Author 2}
\affiliation{Affiliation 1}
\author{Author 3}
\affiliation{Affiliation 2}
\author{Author 4}
\affiliation{Affiliation 1}
\affiliation{Affiliation 3}
In this example affiliation 1 will be associated with authors 1, 2,
and 4, affiliation 2 with author 3 and affiliation 3 with author 4.
Repeated affiliations are automatically recognized and typeset in the
\texttt{superscriptaddress} style. Alternatively you can use a format
similar to that of the \texttt{authblk} package and the
\texttt{elsearticle} document class to specify the same affiliation
relations as follows:
\author[1]{Author 1}
\author[1]{Author 2}
\author[2]{Author 3}
\author[1,3]{Author 4}
\affil[1]{Affiliation 1}
\affil[2]{Affiliation 1}
\affil[3]{Affiliation 1}

  Name Surname,
        \textbf{123}, 123456 (1916).}

  StackExchange discussion on
    submitting to the arXiv'' (2017-01-10)}

  Help article published by the arXiv on
  \href{https://arxiv.org/help/submit_tex}{``Considerations for TeX
    Submissions'' (2017-01-10)}

  StackExchange discussion on
    to get DOI links in bibliography'' (2016-11-18)}
  StackExchange discussion on
    adding DOI fields to a hand-made bibliography'' (2016-11-18)}



\section{First section of the appendix}
Compositionality allows the usage of appendices.

Ideally, the command \texttt{\textbackslash{}appendix} should be put
before the appendices to get appropriate section numbering. The
appendices are then numbered alphabetically, with numeric
(sub)subsection numbering. Equations continue to be numbered
  A \neq B
You are free to change this in case it is more appropriate for your
article, but a consistent and unambiguous numbering of sections and
equations must be ensured.

If you want your appendices to appear in \texttt{onecolumn} mode but
the rest of the document in \texttt{twocolumn} mode, you can insert
the command \texttt{\textbackslash{}onecolumn\textbackslash{}newpage}
before \texttt{\textbackslash{}appendix}.

\section{Problems and Bugs}
Should you encounter any problems using the {\tt
  compositionalityarticle} class please analyse the error message
carefully and look for help online;
\href{http://tex.stackexchange.com/}{http://tex.stackexchange.com/} is
an excellent resource. If you cannot resolve a problem, open a bug
report in our bug-tracker under
You can also contact us via email under
but it may take significantly longer to get a response. In any case we
need the full source of a document that produces the problem and the
log file showing the error to help you.