Included in {TAIL ~ the embodiments}, is a method for realizing {HEAD ~ a storage efficient solution} of the least squares calculation 
Included in { TAIL ~ the embodiments } , is a method for realizing { HEAD ~ a storage efficient solution } of the least squares calculation
OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH