Arguments

D

(input/output) REAL array, shape $(:)$ with $size({\bf D}) = n$, where $n$ is the order of $A$.
On entry, the diagonal of $A$.
On exit, the diagonal of $D$.

E

(input/output) REAL or COMPLEX array, shape $(:)$, with $size({\bf E}) = n-1$.
On entry, the subdiagonal of $A$.
On exit, the subdiagonal of $L$.

B

(input/output) REAL or COMPLEX array, shape $(:,:)$ with $size({\bf B},1) = n$ or shape $(:)$ with $size({\bf B}) = n$.
On entry, the matrix $B$.
On exit, the solution matrix $X$.

INFO

Optional (output) INTEGER.


If INFO is not present and an error occurs, then the program is terminated with an error message.

References: [1] and [17,9,20].