 77 subroutines for solving
      continuous-time matrix algebraic Riccati equations with
      condition and accuracy estimates.
      Preprint SFB393/98-16, Fak. f. Mathematik, Tech. Univ.
      Chemnitz, May 1998.

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<A name="Numerical Aspects"><B><FONT SIZE="+1">Numerical Aspects</FONT></B></A>
<PRE>                            3
  The algorithm requires 0(N ) operations.
  The accuracy of the estimates obtained depends on the solution
  accuracy and on the properties of the 1-norm estimator.

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