"+1">Purpose</FONT></B>
<PRE>
  To compute the relevant eigenvalues of a real N-by-N skew-
  Hamiltonian/Hamiltonian pencil aS - bH, with

        (  A  D  )         (  B  F  )
    S = (        ) and H = (        ),                           (1)
        (  E  A' )         (  G -B' )

  where the notation M' denotes the transpose of the matrix M.
  Optionally, if COMPQ = 'C', an orthogonal basis of the right
  deflating subspace of aS - bH corresponding to the eigenvalues
  with strictly negative real part i