dlatrz(3) on Linux
The text f6b1f7a0d925, as Debian 3.0 (Woody) shipped it.
factor the M-by-(M+L) real upper trapezoidal matrix [ A1 A2 ] = [ A(1:M,1:M) A(1:M,N-L+1:N) ] as ( R 0 ) * Z, by means of orthogonal transformations
The text f6b1f7a0d925, as Debian 3.0 (Woody) shipped it.
factor the M-by-(M+L) real upper trapezoidal matrix [ A1 A2 ] = [ A(1:M,1:M) A(1:M,N-L+1:N) ] as ( R 0 ) * Z, by means of orthogonal transformations