%16/11/2004 (06:05)
%
\documentclass[11pt]{article}
\usepackage{amsmath,amssymb}
\usepackage{amscd}
\thispagestyle{empty}

%%%%%%%%%%%%%
% Mise en page
%%%%%%%%%%%%%

\textheight 260mm
\textwidth 160mm
\hoffset -14mm
\voffset -26mm
\parindent=0pt


%%%%%%%%%%%%%%%%%%%%%%
% Sauts
%%%%%%%%%%%%%%%%%%%%%%

\def\hs{\hbox to 3mm{}}
\def\hhs{\hbox to 5cm{}}
\def\ss{\smallskip}
\def\ms{\smallskip}
\def\bs{\bigskip}
\def\bbss{\vskip 6mm}

%%%%% Divers %%%%%%%%%%%%%%%

\def\pointir{\unskip . --- \ignorespaces}
\def\binomial#1#2{\left(\,\matrix{#1 \cr #2}\,\right)}
\def\NF{\mathcal{N}}
\def\si{\sigma}
\def\om{\omega}
\def\al{\alpha}
\def\ia{\rightarrow\hspace{-13pt}+\ }
\def\ca{\nearrow\hspace{-10pt}\searrow}
\def\cs{\rightarrow\hspace{-15pt}+\ }
\def\SGS{\bigoplus_{n\geq0}{\mathbb Q}[\SG_n]}
\def\FQSym{{\bf FQSym}}
\def\MQSym{{\bf MQSym}}
\def\Zy{\frak Z}
\def\F{\mathbf{F}}
\def\binomial#1#2{\begin{pmatrix} #1 \cr #2\end{pmatrix}}


%%%%%%%%%%%%%%%%%%%%%%%%%
% Espaces
%%%%%%%%%%%%%%%%%%%%%%%%%

\def\ncp#1#2{#1\langle #2 \rangle}
\def\ncs#1#2{#1\langle\langle #2 \rangle\rangle}
\def\G{\frak{G}}
\def\SG{\frak{S}}


%%%%%%%%%%%%%%%%%%%%%%%%%
% Constantes
%%%%%%%%%%%%%%%%%%%%%%%%%

\def\N{\mathbb{N}}
\def\Q{\mathbb{Q}}
\def\Z{\mathbb{Z}}
\def\p{\frak p}




%%%%%%%%%%%%%%%%%%%%%%%%%
% Marqueurs discursifs
%%%%%%%%%%%%%%%%%%%%%%%%%

\newtheorem{example}{Example}[section]
\newtheorem{note}[example]{Note}
\newtheorem{theorem}[example]{Theorem}
\newtheorem{exercise}{Exercise}[section]
\newtheorem{corollary}[example]{Corollary}
\newtheorem{conjecture}[example]{Conjecture}
\newtheorem{definition}[example]{Definition}
\newtheorem{proposition}[example]{Proposition}
\newtheorem{algorithm}[example]{Algorithm}
\newtheorem{lemma}[example]{Lemma}
\def\mref#1{(\ref{#1})}
\def\Proof{\medskip\noindent {\it Proof --- \ }}
\def\cqfd{\hfill \\ \hbox{ }\hfill$\Box$ \bigskip}





\begin{document}

\begin{equation}
S_{2,1}(n,y)=\int_{0}^{+\infty} x^n W_2(x,y) dx
\end{equation}

\begin{equation}
	B_{r,s}(n,y)=\sum_{k=0}^{\infty} S_{r,s}(n,k)y^k
\end{equation}

\begin{equation}
B(n)=\int_{0}^{+\infty} x^n W(x) dx
\end{equation}

\begin{equation}
B_F(n,y)=\int_{0}^{+\infty} x^n W_F(x,y) dx
\end{equation}

\begin{equation}
B_G(n,y)=\int_{0}^{+\infty} x^n W_G(x,y) dx
\end{equation}


\begin{equation}
W_{FG}(x,y)=\int_{0}^{+\infty} W_F(x,z)W_G(z,y) dz
\end{equation}



\end{document}