gular value in the MIMO case), coded in the same way
          as FPEAK.

</PRE>
<B>Tolerances</B>
<PRE>
  TOL     DOUBLE PRECISION array, dimension K, where K = 2, if
          CKPROP = 'N' or DICO = 'D' or JOBE = 'I', and K = 4,
          otherwise.
          TOL(1) is the tolerance used to set the accuracy in
          determining the norm.  0 &lt;= TOL(1) &lt; 1.
          TOL(2) is the threshold value for magnitude of the matrix
          elements, if EQUIL = 'S': elements with magnitude less
         