We study Cantor Staircases in physics that have the Farey-Brocot arrangement
for the Q/P rational heights of stability intervals I(Q/P), and such that the
length of I(Q/P)is a convex function of 1/P. Circle map staircases and the
magnetization function fall in this category. We show that the fractal sets
Ommega underlying these staircases are connected with key sets in Number Theory
via their (alpha,f(alpha)) multifractal decomposition spectra. It follows that
such sets Ommega are self similar when the usual (Euclidean) measure is
replaced by the hyperbolic measure induced by the Farey-Brocot partition.