he remaining part
          is set to zero.

  LDA     INTEGER
          The leading dimension of the array A.  LDA &gt;= MAX(1,N).

  B       (input/output) COMPLEX*16 array, dimension (LDB,N)
          On entry, the leading N-by-N upper triangular part of this
          array must contain the upper triangular matrix B in the
          generalized complex Schur form, as returned by the LAPACK
          Library routine ZGGES. The diagonal elements of B are real
          non-negative, hence the imaginary pa