\documentclass[a4paper,12pt,onecolumn,twosided,final]{article}
\usepackage[swedish,english]{babel} 
\usepackage[ansinew]{inputenc}
\selectlanguage{english} 
\usepackage{amsfonts} 
\usepackage{amssymb}
%\usepackage{alltt} 
%\usepackage{graphicx}
%\usepackage[outer=1cm,inner=1cm,top=2cm,bottom=2cm]{geometry}
%\usepackage{lscape} 
%\usepackage{setspace} 
\usepackage{float}
\renewcommand{\thefootnote}{\arabic{footnote}} 

\author{} 
\title{}

\begin{document} 
\section{} 
\subsection{} 
\subsubsection{} 

\end{document}