nag_lapackeig_zheevx (f08fpc) Example Program Data
  4                                                :Value of n
 -2.0         2.0                                  :Values of vl and vu
 (1.0, 0.0)  (2.0, -1.0)  (3.0, -1.0)  (4.0, -1.0)
             (2.0,  0.0)  (3.0, -2.0)  (4.0, -2.0)
                          (3.0,  0.0)  (4.0, -3.0)
                                       (4.0,  0.0) :End of matrix A