/A>
<PRE>
  This routine is particularly suited for systems where the matrix R
  is ill-conditioned, or even singular.

</PRE>
<A name="Comments"><B><FONT SIZE="+1">Further Comments</FONT></B></A>
<PRE>
  To obtain a stabilizing solution of the algebraic Riccati
  equations set SORT = 'S'.

  The routine can also compute the anti-stabilizing solutions of
  the algebraic Riccati equations, by specifying SORT = 'U'.

</PRE>

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