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extendedRowEchelon


\begin{usage} extendedRowEchelon~a\\ extendedRowEchelon!~a \end{usage}

\begin{signatures} extendedRowEchelon: & M $\to$\ (M,Z $\to$\ Z,Z,\htmlref{\te... ...Z,\htmlref{\texttt{PrimitiveArray}}{PrimitiveArray} Z,Z,M)\\\end{signatures}



\begin{params} {\em a} & M & A matrix whose REF and corresponding transformation matrix\\ & & have to be computed\\\end{params}

\begin{descr} We say that a matrix $a$\ is in REF if there are $r$\ (the rank)... ...ormation matrix {\em u} is stored as entry $(p(i),j)$\ in {\em w}.\end{descr}

\begin{remarks} extendedRowEchelon!~does not make a copy of $a$, but performs all the computations in--place, storing the final result in $a$. \end{remarks}


See Also


Manuel Bronstein 2000-12-13