- DL
- (
*input/output*)**REAL**or**COMPLEX**array, shape with , where is the order of**A**.

On entry, the subdiagonal of .

On exit, the elements of the second superdiagonal of in . - D
- (
*input/output*)**REAL**or**COMPLEX**array, shape with .

On entry, the diagonal of .

On exit, the diagonal of . - DU
- (
*input/output*)**REAL**or**COMPLEX**array, shape with .

On entry, the superdiagonal of .

On exit, the first superdiagonal of . - B
- (
*input/output*)**REAL**or**COMPLEX**array, shape with or shape with .

On entry, the matrix .

On exit, the solution matrix . - 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