\def\firstpage{1}
\def\lastpage{1}
\documentclass{iwan}
\begin{document}
\begin{topmatter}
\title{TITLE of the LECTURE}
\author{First Name Last Name}
\vskip 0.2cm \institution{Departamento de Matem\'atica, Instituto
Superior T\'ecnico}
\address{Av. Rovisco Pais,1, 1094-001 Lisboa, Portugal}
\email{IWANASP@ist.utl.pt}
\end{topmatter}
\makeatletter
\c@page=\firstpage
% ************* Begin of Abstract ******************%
 Let us consider the
weakly singular Fredholm integral operator $T:X{\to}X$ defined by
\begin{equation}
(T\varphi)(\tau)=k
\int_{0}^{\tau^{\ast}}E_1(|\tau-\tau'|)\varphi(\tau')\,d\tau'.
\label{eq:1}
\end{equation}



 The main results for (\ref{eq:1}) are given in the following Lemma \ref{lem:1}
and Theorem \ref{thm:1}.

\begin{lem}\label{lem:1}
We now prove some properties of the following operator
\begin{equation}
\mbox{equation} \label{eq:2}
\end{equation}

\end{lem}

\begin{thm}\label{thm:1}
 We are now in a position to state  our main result.
\end{thm}

The following bibliography gives sample items for a journal
article~\cite{1aj}, for a book~\cite{3book} and for proceedings of
conferences~\cite{2ap}.
% ************* End of Abstract ******************%


\begin{thebibliography}{99}

\bibitem{1aj}
\artj {F.~Author, S.~Author and T.~Author}
{Article in journal}              %it
{Journal}
{1}                               %volume
{(2), 1998, 3 -- 40}              %number
{}

\bibitem{2ap}
\artp {Author}
{Article in proceedings}          %it
{Proc. of first Conference, Lisbon, Portugal, 2001} {Numerical
Solution of Singular Problems, firt editor and second editor
(Eds.)} {1998, 255 -- 264} {(in Portuguese)}

\bibitem{3book}
\book {A.~Author} {}
{Boundary integral  methods}    %it
{Publishers, New York} {1991} {}

\end{thebibliography}

\end{document}
