More in general, for integers d > 0 and K > 0, consider a tree sample T d,K consisting of d trees t i , 1 ≤ i ≤ d. Each t i contains k i ≥ 0 occurrences of rule S → aS and one occurrence of rule S → a.
we have In Figure 1 we plot H(p T d,K , p G,q ) in the case K d = 0.5 and in the case K d = 1.5.