\documentclass[12pt]{article}
\usepackage[T1]{fontenc}
\usepackage[cp1250]{inputenc}
\usepackage{amssymb}
\usepackage[mathscr]{eucal}
\usepackage{amsmath}
\usepackage{amsthm}
\usepackage{amsfonts}

\begin{document}
\title{Title of the paper}
\author{Name of the author}
\date{}
\maketitle
\begin{abstract}
The content of the abstract
\end{abstract}

\textbf{Afiliation:} Name of the university or institute
\end{document}