Arguments

A

(input/output) REAL or COMPLEX array, shape $(:,:)$ with $size({\bf A},1) = m$ and $size({\bf A},2) = n$.
On entry, the matrix $A$.
On exit, the contents of A are destroyed.

B

(input/output) REAL or COMPLEX array, shape $(:,:)$ with $size({\bf B},1) = p$ and $size({\bf B},2) = n$.
On entry, the matrix $B$.
On exit, the contents of B are destroyed.

C

(input/output) REAL or COMPLEX array, shape $(:)$ with $size({\bf C}) = m$.
On entry, the vector $c$.
On exit, the residual sum of squares for the solution is given by the sum of squares of elements $n-p+1$ to $m$.

D

(input/output) REAL or COMPLEX array, shape $(:)$ with $size({\bf D}) = p$.
On entry, The vectors $d$.
On exit, the contents of D are destroyed.

X

(output) REAL or COMPLEX array, shape $(:)$ with $size({\bf X})=n$.
The solution vector $x$.

INFO

Optional (output) INTEGER.


If ${\bf INFO}$ is not present and an error occurs, then the program is terminated with an error message.

References: [1] and [17,9,20].