rank

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rank

$\begin{usage} rank(M)(a) \end{usage}$

Signature

rank: (M:MatrixCategory %) $\to$ M $\to$ MachineInteger

$\begin{params} {\em M} & \htmlref{\texttt{MatrixCategory}}{MatrixCategory} \% & A matrix type\\ {\em a} & M & A matrix\\\end{params}$

$\begin{retval} Returns $(rank?, r)$\ such that $r \le \mbox{rank}(a)$, and $r$\ is exactly the rank of $a$\ if $rank?$\ is {\it true}\xspace . \end{retval}$

See Also

rankLowerBound,span

Manuel Bronstein 2000-12-13