Clearly, this is important as correctness of {HEAD ~ a system} with {TAIL ~ a fixed number} of threads does not, in general, establish correctness for an arbitrary number 
with
Clearly , this is important as correctness of { HEAD ~ a system } with { TAIL ~ a fixed number } of threads does not , in general , establish correctness for an arbitrary number
OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH