Ralph Byers, Department of Mathematics, University of Kansas,
Lawrence, Kansas  66045, byers@na-net.stanford.edu
 
 
      SQRED implements Van Loan's ``square reduced'' algorithm [1]
      for calculating all eigenvalues of a Hamiltonian matrix. This 
      implementation appears in [2].  
 
 
      References:
       [1] Charles Van Loan, ``A Symplectic Method for Approximating
           All Eigenvalues of a Hamiltonian Matrix'', Linear Algebra
           and Its Applications, volume 61, 1984, 233-251.
 
       [2] Ralph Byers, ``Hamiltonian and Symplectic Algorithms for 
           the Algebraic Riccati Equation'', PhD dissertation, Center
           for Applied Mathematics, Cornell University, Ithaca, New
           York, 1983
 
The file sqred.f contains the required subroutines GENREF, VECREF, and SYMREF.
In addition DDOT, DCOPY, DROTG and DROTG from the LINPACK BLAS are also required.
