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Matlab\textsuperscript{\tiny\textregistered}
Perro Fiel
Matlab\textsuperscript{\tiny\textregistered}\documentclass{article}
%\usepackage{hyperref} % not needed; should go before cleveref if loaded
\usepackage{cleveref}
\crefformat{section}{\S#2#1#3} % see manual of cleveref, section 8.2.1
\crefformat{subsection}{\S#2#1#3}
\crefformat{subsubsection}{\S#2#1#3}
\begin{document}
\section{A section}\label{sec:section}
\subsection{A subsection}\label{sec:subsection}
\subsubsection{A subsubsection}\label{sec:subsubsection}
See \cref{sec:section}, \cref{sec:subsection} or \cref{sec:subsubsection}.
\end{document}