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\begin{document}
\begin{center}
{\bf S\'eries non-commutatives :\\ Trois (joyeuses) contributions l'Informatique aux Math\'ematiques 
et \`a la Physique}
\end{center}
    
{\bf R\'esum\'e}  L'Informatique Th\'eorique a d\^u inventer des mod\`eles pour comprendre le 
comportement des machines (mots, automates ...). Ce faisant, elle a \'et\'e contrainte de d\'evelopper des 
structures nouvelles qui permettent de r\'esoudre certains probl\`emes issus des autres sciences. 

\begin{center}
{\bf Non commutative series :\\ Three (joyful) contributions of Computer Science to Mathematics and Physics}
\end{center}

{\bf Abstract} Theoretical Computer Science needed to develop models in order to understand the 
behaviour of computers (words, automata ...). Doing this, one had to invent new structures allowing 
to solve some problems originated from other sciences.

\end{document}