\documentclass[12pt]{article}

\setlength{\marginparwidth}{10pt}
\setlength{\headsep}{25pt}


\newtheorem{definition}{Definition}
\newtheorem{proposition}{Proposition}
\newtheorem{theoreme}{Thoreme}
\newtheorem{remark}{Remark}
\newtheorem{lemma}{Lemma}
\newtheorem{theorem}{Theorem}
\newtheorem{Exemple}{Example}
\newtheorem{Corollary}{Corollary}
\newtheorem{Example}{Example}
\newtheorem{Note}{Note}
\newcommand{\splus}{\framebox(6.5,6.5){$+$}}
\newcommand{\sdot}{\framebox(6.5,6.5){$.$}}
\newcommand{\scriptdot}{\framebox(4.7,4.7){\scriptsize{$.$}}}
\newcommand{\scriptstar}{\framebox(4.7,4.7){\scriptsize{$*$}}}



%
\def\A{{\mathcal{A}}}
\def\B{{\mathbb{B}}}
\def\E{{\mathcal{E}}}
\def\K{{\mathbb{K}}}
\def\Z{{\mathbb{Z}}}
\def\Q{{\mathbb{Q}}}
\def\R{{\mathbb{R}}}
\def\C{{\mathbb{C}}}
\def\H{{\mathbb{H}}}
\def\mref#1{(\ref{#1})}
\def\scal#1#2{\langle #1| #2\rangle}
\def\qed{\mbox{ }\hfill\(\square\)}
\def\recncs#1#2{#1_{\rm rec}\langle\langle #2\rangle\rangle}
\def\rncs#1#2{#1_{\rm rat}\langle\langle #2\rangle\rangle}
\def \F{\mathcal F}
\def \A{\mathbb{A}}
\def\ss{\smallskip}
\def\ms{\medskip}
\def\mhs{\hbox to 1cm{}}
\def\bs{\bigskip}
\def\hs{\hbox to 3mm{}}
\def\hhs{\hspace{1cm}}


\def\al{\alpha}
\def\be{\beta}
\def\ep{\epsilon}
\def\ga{\gamma}
\def\om{\omega}
\def\la{\lambda}
\def\Si{\Sigma}
\def\E{{\mathcal E}}
\def\T{{\cal T}}
\def\N{\mathbb{N}}

% Expressions

\def\aci{\sim_{aci}}
\def\acm#1{\sim_{acm#1}}
\def\rat{\sim_{rat}}
\def\acs{\sim_{acs}}
\def\PB#1{{\rm B}$#1$}
\def\PB{{\rm B}\ }
\def\base#1{{\mathcal B}#1}

% Signes

\def\Box{\fbox{\hspace{2mm}}}
\def\kd#1#2{\delta{#1#2}}
\def\ncp#1#2{#1\langle #2\rangle}
\def\ncs#1#2{#1\langle\langle #2\rangle\rangle}
%\def\rncs#1#2{#1\langle\langle #2\rangle\rangle^{\rm rat}}
\def\pncs#1#2{#1\langle\langle #2\rangle\rangle_{\Phi-finite}}
\def\pointir{\unskip . --- \ignorespaces}
\def\ra{\rightarrow}
\def\tl{\triangleleft}
\def\tr{\triangleright}
\def\scal#1#2{\leftangle #1| #2\rightangle}
\def\bu{$\bullet\ $}
\def\supp{\textrm{supp}}
\newcommand{\ostar}{\framebox(6.5,6.5){$*$}}



\begin{document}

\end{document}
