“…However non-doubling measure is a nonnegative measure µ only satisfies the polynomial growth condition, i.e., for all x ∈ X and r > 0, there exists a constant C > 0 and k ∈ (0, n] such that, µ(B(x, r)) ≤ C 0 r k , (1.1) where B(x, r) = {y ∈ X : |y − x| < r}. This brings rapid development in harmonic analysis (see [2,7,10,11,22,24,25,27]). As an important application, it is to solve the long-standing open Painlevé's problem (see [24]).…”