 If JOBE = 'C', RANKE denotes the rank of the descriptor
          matrix E or the size of the full-rank block T.
          0 &lt;= RANKE &lt;= N.

  FPEAK   (input/output) DOUBLE PRECISION array, dimension (2)
          On entry, this parameter must contain an estimate of the
          frequency where the gain of the frequency response would
          achieve its peak value. Setting FPEAK(2) = 0 indicates an
          infinite frequency. An accurate estimate could reduce the
          number of iterations 