- A
- (
*input/output*)**REAL**or**COMPLEX**square array, shape .

On entry, the matrix .

On exit, the factors and from the factorization ; the unit diagonal elements of are not stored. - B
- (
*input/output*)**REAL**or**COMPLEX**array, shape with = or shape with .

On entry, the matrix .

On exit, the solution matrix . - IPIV
*Optional*(*output*)**INTEGER**array, shape with .

The pivot indices that define the permutation matrix ; row of the matrix was interchanged with row .- INFO
*Optional*(*output*)**INTEGER**

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

Susan Blackford 2001-08-19