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companion


\begin{usage} companion~p \end{usage}


Signature


\begin{params} {\em p} & \% & A polynomial\\ \end{params}

\begin{retval} Returns the companion matrix \begin{displaymath} \pmatrix{ 0 & &... ...& -a_{n-1}\cr } \end{displaymath}where $p = \sum_{i=0}^n a_i P_i$. \end{retval}

Manuel Bronstein 2000-12-13