- D
*(input/output)***REAL**array, shape with , where is the order of .

On entry, the diagonal of .

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

On entry, the subdiagonal of .

On exit, the subdiagonal 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**INFO**is not present and an error occurs, then the program is terminated with an error message.

Susan Blackford 2001-08-19