\documentclass[11pt]{amsart}

% your optional definitions
\newtheorem{thm}{Main Theorem}

%%% mandatory AMS fields

%author
\author[F.\,M.\,Lastname]{First Middle Lastname}
\address{Department of Mathematics\\ University of ...\\ City}
\email{fmlast@math.uni.ac.xx}
\urladdr{http://math.uni.ac.xx/\~{}fmlast}
%for every further author specify data in the same way
\author[F2.\,M2.\,Lastname2]{First2 Middle2 Lastname2}
\address{Department of Mathematics2\\ University of ...\\ City}
\email{fmlast2@math2.uni.ac.xx}
\urladdr{http://math2.uni.ac.xx/\~{}fmlast2}

%title, Mathematics Subject Classification, keywords and phrases 
\title[Observation on circles]{Observation on circles with respect to planes}
\subjclass{Primary 99Z99; secondary 00A00--99Z98}
\keywords{Circles, planes}

%%% optional AMS fields
\thanks{This work was supported by ...}

%%% do not change the order of the following
\usepackage{aaa68}
\AAAsubmitted{June-September xx, 2004}
\AAApage{1}
\begin{document}

\begin{abstract}
  The abstract goes here.
\end{abstract}
\maketitle

Let the article begin ...
\begin{thm}  All circles are round 
\end{thm}
\begin{proof}
By induction on the size, starting with 
$$ o $$
and $$O$$
\end{proof}

First attempts to solve this problem have been made in \cite{mel} and \cite{me2}.

\newpage
continued 2 ...

\newpage
continued 3 ...


\begin{thebibliography}{1}
\bibitem{mel}
F.\,M.\,Lastname.:
\newblock \textit{My first paper.} 
\newblock J.\,Journalisis, \textbf{9} (1869), 101-105. 
\bibitem{me2}
F.\,M.\,Lastname, F2.\,M2.\,Lastname2.:
\newblock \textit{My second paper.}
\newblock J.\,Mathematica, \textbf{3} (1871), 91-97.
\end{thebibliography}

\end{document}
