          = 'Z':  D is assumed a zero matrix.

</PRE>
<B>Input/Output Parameters</B>
<PRE>
  N       (input) INTEGER
          The dimension of state vector x, i.e. the order of the
          matrix A, the number of rows of B and the number of
          columns of C.  N &gt;= 0.

  M       (input) INTEGER
          The dimension of input vector u, i.e. the number of
          columns of matrices B and D, and the number of rows of F.
          M &gt;= 0.

  P       (input) INTEGER
          The dimension of 