for D being non empty set
for f being FinSequence of D
for p1, p2, p3 being Element of D st p1 in rng f & p2 in rng f & p3 in rng f & p1 .. f < p2 .. f & p2 .. f <= p3 .. f holds
p2 .. (Rotate (f,p1)) <= p3 .. (Rotate (f,p1))