riangular part of
          this array must contain the matrix B of the pencil.
          The (2,1) entry is not referenced.

  LDB     INTEGER
          The leading dimension of the array B.  LDB &gt;= 2.

  D       (input) COMPLEX*16 array, dimension (LDD, 2)
          On entry, the leading 2-by-2 upper triangular part of
          this array must contain the matrix D of the pencil.
          The (2,1) entry is not referenced.

  LDD     INTEGER
          The leading dimension of the array D.  LDD &gt;= 2