% $Date: 2003/09/15 16:37:45 $ $Author: nthiery $ $Revision: 1.1.1.1 $

\begin{Mhelppage}{FactorPerm}%
  {V. Prosper}%
  \begin{MInfo}
    \eng{tests whether a permutation factorizes into a direct product}
  \end{MInfo}
  

\begin{MCalls}
  \Mcall{perm}
\end{MCalls}

\begin{MParameters}
  \param{perm}
  \eng{any list denoting a permutation} 
\end{MParameters}

\begin{MIntro}
  \eng{

Given a permutation \Mex{perm} in \Mmath{Sn}{S_n}, the {\Mthis} function
tests whether \Mex{perm} belongs to a Young sub-group
\Mmath{Si x Sj}{S_i\times S_j}

The result is a couple \Mex{Test,l} where \Mex{Test} is a boolean and \Mex{l}
the minimal length of a left block.
}
\end{MIntro}

\begin{MExample}{ex1}
\begin{Mexin}
muEC::SG::FactorPerm( [3,1,2,5,4,7,6] );
\end{Mexin}
\begin{Mexout}
                            TRUE, 3
\end{Mexout}
\end{MExample}

\MRelatedFunctions{}
\end{Mhelppage}
