{HEAD ~ This functional dependence} of {TAIL ~ η} allows the learning rate to change adaptively with the error E 
of
{ HEAD ~ This functional dependence } of { TAIL ~ η } allows the learning rate to change adaptively with the error E
HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH