\subsection{Description}

This step is the symbolic factorisation step described in
\hyperref[symbol]{\ref{symbol}}.

\subsection{Parameters}

If user didn't called ordering step with \texttt{Scotch},
\iparm{IPARM\_LEVEL\_OF\_FILL} has to be set to
\texttt{-1} to use \texttt{KASS} algorithm.\\
If \pastix{} was compiled with \texttt{-DMETIS}, this parameter will
be forced to \texttt{-1}.

If \pastix{} runs \texttt{KASS} algorithm,
\iparm{IPARM\_AMALGAMATION\_LEVEL} will be take into
account.\\
\texttt{KASS} will merge supernodes untill fill reaches
\iparm{IPARM\_AMALGAMATION\_LEVEL}.

