for X being non empty finite Subset of (BinFinTrees IndexedREAL)
for s, t, w being finite binary DecoratedTree of IndexedREAL st ( for T being finite binary DecoratedTree of IndexedREAL st T in X holds
for p being Element of dom T
for r being Element of NAT st r = (T . p) `1 holds
r <= MaxVl X ) & ( for p, q being finite binary DecoratedTree of IndexedREAL st p in X & q in X & p <> q holds
(rng p) /\ (rng q) = {} ) & s in X & t in X & s <> t & w in X \ {s,t} holds
(rng (MakeTree (t,s,((MaxVl X) + 1)))) /\ (rng w) = {}