\documentclass[11pt]{amsart}

%%% Necessary packages, please do not change
\usepackage[french,english]{babel}
\usepackage{hyperref}
\hypersetup{
    colorlinks=true,
    linkcolor=blue,
    citecolor=blue,
    filecolor=blue,
    urlcolor=blue
}
\usepackage[all]{xypic}
\usepackage{amssymb,setspace}


%%% Pagesize: please do not change

\hoffset -1cm
\voffset -1.5cm
\textwidth 6in
\textheight 8.5in


%%% Page title: please do not change

\newcommand{\header}{
 \vskip 6truept
  \centerline{\large 4$^{\text{th}}$ International Conference on Variational Analysis and Optimization}
  \centerline{\textit{In honor of Professor Marco L\'opez-Cerd\'a}}
  \centerline{Center for Mathematical Modeling (CMM), Santiago, Chile}
  \centerline{14-17 January, 2025}
 \vskip 6truept
 \vspace{1cm}
 }
 
%%%  Title of the abstract

\title{ \header TITLE}


%%%  Name and affiliation

\author{\underline{Lastname1}, I1 and Lastname2, I2}
\address{University XX, Contry  \\ email: \href{mailto:author@university.com}{{\rm author@university.com}}.
}
%\thanks{This work is partially funded by...}


\thispagestyle{empty}
\begin{document}
\maketitle
%\thispagestyle{empty}
\onehalfspacing

%%% Small abstract 

%\begin{abstract}

Abstract detail

%\end{abstract}
\vspace{3cm}

%%% Text of the abstract (no more than 2 pages)


 
\thispagestyle{empty}

%%% References: please, follow the example

%\begin{thebibliography}{99}

 %\bibitem{tpp1}
 %N1.~Lastname1, N2.~Lastname2:
% {\em Title article},  name of journal, number, initial page--last page, year.

% \bibitem{tpp1}
% N1.~Lastname1, N2.~Lastname2:
% {\em Title article},
% name of journal, number, initial page--last page, year.

 %\end{thebibliography}
 \end{document}