span!

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span!

$\begin{usage} span!(a,r,c,p) \end{usage}$

Signature

span!: (PrimitiveArray PrimitiveArray Z,Z,Z) $\to$ Array Z

where
Z == MachineInteger

$\begin{params} {\em a} & \htmlref{\texttt{PrimitiveArray}}{PrimitiveArray} \ht... ... & \htmlref{\texttt{MachineInteger}}{MachineInteger} & a prime\\\end{params}$

$\begin{retval} Returns $[c_1,\dots,c_r]$\ where $r$\ is the rank of {\em a} ove... ...$and the span of $a$\ is generated by its columns $c_1,\dots,c_r$. \end{retval}$

$\begin{remarks} Does not make a copy of $a$, but performs all the computations in--place, modifying the entries of $a$. \end{remarks}$

Manuel Bronstein 2000-12-13