Note that according to the invention, there is no need to know the value of each parameter Pi to calculate {HEAD ~ the set} of {TAIL ~ correspondences}  
Note that according to the invention , there is no need to know the value of each parameter Pi to calculate { HEAD ~ the set } of { TAIL ~ correspondences }
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL OTH