iveness of the
  accuracy enhancing technique depends on the accuracy of the
  solution of a Riccati equation. An ill-conditioned Riccati
  solution typically results when [D BETA*I] is nearly
  rank deficient.
                                   3
  The algorithm requires about 100N  floating point operations.

</PRE>

<A name="Comments"><B><FONT SIZE="+1">Further Comments</FONT></B></A>
<PRE>
  None
</PRE>

<A name="Example"><B><FONT SIZE="+1">Example</FONT></B></A>
<P>
<B>Program Text</B>
<PRE>
*     AB09