\documentclass[a4paper]{article} %
\usepackage{graphicx,amssymb,amsmath,amsfonts} %
\usepackage[left=35mm, right=35mm, top=20mm, bottom=20mm, noheadfoot]{geometry}

\textwidth=17cm \hoffset=-1.2cm %
\textheight=25cm \voffset=-1cm %

\pagestyle{empty} %

\date{} %

%\def\keywords#1{\begin{center}{\bf Keywords}\\{#1}\end{center}} %
\def\keywords#1{{\bf Keywords: }{#1}}

% begin the document
\begin{document}
\thispagestyle{empty}

\title{\textbf{Title}}

% Authors
\author{Author 1, Author 2, Author 3 \\ %
	University authors 1-3 \\ \\ % Affiliation 1
	Author 4 \\ % If any other author with different Affilation
	University author 4 \\ \\ % Affiliation 2 (if needed)
	% New author \\
	% New affiliation \\
	% Add authors and affiliation as needed
	\tt{author@university.com} % Only one corresponding e-mail
}%

\date{} % <--- leave date empty
\maketitle\thispagestyle{empty} %% <-- you need this for the first page


\begin{abstract}
This is the template of a extended abstract for submitting a proposal for a talk or a poster presentation at IV JIAAIS 2017. You should send the pdf file.


\end{abstract}

\keywords{keyword1, keyword2}




\end{document}