 in consecutive locations.

  ALPHAI  (output) DOUBLE PRECISION array, dimension (N)
          On exit, if INFO = 0, the leading N elements of this array
          contain the scaled imaginary parts of the eigenvalues
          of A.

  BETA    (output) DOUBLE PRECISION array, dimension (N)
          On exit, if INFO = 0, the leading N elements of this array
          contain indicators for infinite eigenvalues. That is, if
          BETA(I) = 0.0, then the i-th eigenvalue is infinite.
          Otherwise B