Arguments

A

(input/output) REAL or COMPLEX square array, shape (:,:).
On entry, the matrix $A$.
If ${\bf UPLO}$ = 'U', the upper triangular part of ${\bf A}$ contains the upper triangular part of the matrix $A$, and the strictly lower triangular part of ${\bf A}$ is not referenced. If ${\bf UPLO}$ = 'L', the lower triangular part of ${\bf A}$ contains the lower triangular part of the matrix $A$, and the strictly upper triangular part of ${\bf A}$ is not referenced.
On exit, the factor $U$ or $L$ from the Cholesky factorization $A = U^HU = LL^H$.

B

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

UPLO

Optional (input) CHARACTER(LEN=1)


Default value: 'U'.

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].