\documentclass{amsart}
\usepackage{amsfonts,amssymb,amsmath,amsthm}
\usepackage{url}
\usepackage{enumerate}
\urlstyle{sf}
\newtheorem{thrm}{Theorem}[section]
\newtheorem{lem}[thrm]{Lemma}
\newtheorem{prop}[thrm]{Proposition}
\newtheorem{cor}[thrm]{Corollary}
\theoremstyle{definition}
\newtheorem{definition}[thrm]{Definition}
\newtheorem{remark}[thrm]{Remark}
\numberwithin{equation}{section}
\author{A.~U. Thor}
\address{
Mathematics Department\\
Northern University\\
Athabasca, N.W.T.}
\email{author@math.nu.ca}
\thanks{This work was done while the author was a visiting scholar at
a northern university}
\keywords{Keywords here}
\subjclass{Primary 99X99, Secondary 99Y99}
%% NB There should be only one primary classification, and zero or
%more secondary classifications.
\begin{document}
\title[Running Head]{Title of the Paper}
\begin{abstract}
Include a short abstract which is also a stand-alone document. Please do not
include citations in the abstract. The abstract should not contain
figures nor displayed formulae.
\end{abstract}
\maketitle
\section{Introduction} \label{sect1}
Your submission should be written in clear and unambiguous language
using \LaTeX.
If you are not familiar with \TeX\ or \LaTeX ,
see the Wikipedia entry on \LaTeX\ or the
\TeX\ User Group pages (``Getting Started'') \cite{tug} for an
introduction, as well as references to many on-line resources.
Many web sites, \emph{e.g.,} \cite{camb}, have manuals
that may be downloaded and printed.
Books are available that
will give you a good overview \cite{gr,KD}. The \LaTeX\ companion \cite{mg}
discusses many additional packages that can be helpful.
Also be aware that the use of plain \TeX\ or AMS\TeX\ can cause
delays in the processing of your paper.
Submit your text as a flat file. That is, with the exception of
figures, your paper should be a
single file containing the \LaTeX\ preamble, macros, text and
bibliography. Figures (see \S \ref{fig}) may be submitted as separate
files.
Before sending the \LaTeX\ file to the editors, remove unnecessary
macros and run your \LaTeX\ code one last time. Pay attention to all
warnings that are generated and fix the reported errors.
\section{Theorem-Like Environments} \label{ns}
Here is where you likely will begin the main part your paper. Please
use theorem-like environments.
\begin{definition}\label{d1}
Definitions and remarks are printed in roman text
and require no proof.
\end{definition}
\begin{lem} \label{l1}
Lemmas establish results used in proofs of other results.
\end{lem}
\begin{thrm}\label{t1}
Theorems, lemmas, corollaries and propositions need proofs and are
printed in italic.
\end{thrm}
Please use labels for theorem-like environments so that later in
your paper you may refer to them
easily,
\emph{e.g.,} Lemma \ref{l1} or Theorem \ref{t1}.
\begin{proof}
Let $\alpha$ and $\beta$ satisfy
\begin{align}
\int^\alpha_0 \frac{e^x}{1 + x^2} \,dx &= 1,
\label{eq1}
\\
\int^\beta_0 \frac{e^x}{1 + x^2} \,dx &= 2.
\label{eq2}
\end{align}
Then setting $z = \cos(\alpha -\beta)$
establishes the claim.
\end{proof}
\section{Enumerated Lists}
We prefer to use lower case roman numerals for numbered lists. Arabic
numbers enclosed in parentheses look too much like references to
numbered equations.
\begin{enumerate}[(i)]
\item The first item.
\item The second item.
\end{enumerate}
\section{Formatting the Math}
Try to avoid inventing your own math symbols. What looks fine with
your printer may not be compatible with our fonts. Please note that the use of
\verb!\eqnarray!
is deprecated.
Use
\verb|align|,
\verb|gather|,
\verb|flalign|,
\verb|alignat|,
etc., instead.
\subsection{Numbered Equations}
Equations should be numbered \emph{only} if they are referenced
elsewhere in the paper, and then you should use labels as in
\eqref{eq1} or \eqref{eq2}.
\subsection{Unnumbered Equations} Unnumbered but displayed math should
be used when a formula causes an overfull box or when the formula will occupy
more than one line.
\section{Figures}\label{fig}
Figures should be sent as .ps or .eps files. Be aware that our line size is approx
12.4 cm or 4.75 in; figures should fit those measurements.
Please include the name of the program that produced the figures when
submitting your tex files.
\appendix
\section{}
References should be listed alphabetically by the authors'
surnames. The references should be in the style listed below. Please
do not invert authors' names; do not put authors' names in all
capitalized letters.
The list of references should reflect sources that are available
either in a library or online and then should have a \textsf{url}
included. If you bear in mind that the references are intended to help people
locate material in a library, then the following will be
self-evident. References to unpublished material are not helpful to
your readers. Reference to work ``in progress'' should not be cited in
a bibliography. Unpublished material\footnote{By unpublished material
we include lecture notes, manuscripts that may have circulated but
have never been published, preprints for which there is no url
available, \emph{i.e.,} all material that is not available in a
library or on a web site.} may be acknowledged in the text,
preferably in a footnote, but not referenced.
We have included references to an article appearing in a journal \cite{mo}, a
book \cite{KD}, a paper that forms a chapter in a book \cite{ch}, a
thesis \cite{gi} and material that is
available on the web \cite{camb}.
\proof[Acknowledgements]
Acknowledgement of colleagues, institutions and referees may be placed
here along with long descriptions of grants and financial aid. A
short acknowledgement of funding sources should go in the
\verb!\thanks{}!
environment in the preamble. Thanks to the London Mathematical Society
for granting
permission to use (parts of) their instructions for authors submitting
to the
Bulletin,
Journal, and Proceedings of the London Mathematical Society.
\begin{thebibliography}{10}
\bibitem{camb}
Department of Engineering,
\emph{Text processing using \LaTeX.}
University of Cambridge
\url{http://www.eng.cam.ac.uk/help/tpl/textprocessing/}.
\bibitem {ch}
T. Chinburg,
\emph{Minimal models of curves over Dedekind rings.}
In: Arithmetic Geometry, Springer, New York, 1986,
pp. 309--326.
\bibitem{gi}
P.~K. Gilbert,
\emph{COLLATE: A System to Aid in the Preparation Of Critical Editions.}
Ph.D. dissertation, University of Wisconsin, 1978.
\bibitem {gr}
G. Gr\"atzer,
\emph{Math into \LaTeX: An Introduction to \LaTeX\ and \AmS-\LaTeX.}
Birkh\"auser, Boston, 1996.
\bibitem {KD}
H. Kopka and P.~W. Daly,
\emph{Guide to \LaTeX\.} Fourth edition.
Addison-Wesley, Boston, 2004.
\bibitem {mg}
F. Mittelbach and M. Goossens,
\emph{The \LaTeX\ Companion.}
Second edition. Addison-Wesley, Boston, 2004.
\bibitem{mo}R.~A. Mollin,
{Necessary and sufficient conditions for the central norm
to equal $2^h$ in the simple continued fraction expansion
of $\sqrt2^hc$ for any odd $c>1$.}
Canad. Math. Bull.
{\bf 48}(2005), no.~1, 121--132.
\bibitem{tug} The \TeX\ User Group (TUG) Home Page, \url{www.tug.org}
\end{thebibliography}
\end{document}