In other words, <math>C_H^d(S)</math> is the infimum of the set of numbers <math>\delta \geq 0</math> such that there is some (indexed) collection of balls <math>\{B(x_i,r_i):i\in I\}</math> covering S with r<sub>i</sub> > 0 for each i ∈ I that satisfies <math>\sum_{i\in I} r_i^d<\delta </math>. (Here, we use the standard convention that inf Ø = ∞.) | In other words, <math>C_H^d(S)</math> is the infimum of the set of numbers <math>\delta \geq 0</math> such that there is some (indexed) collection of balls <math>\{B(x_i,r_i):i\in I\}</math> covering S with r<sub>i</sub> > 0 for each i ∈ I that satisfies <math>\sum_{i\in I} r_i^d<\delta </math>. (Here, we use the standard convention that inf Ø = ∞.) |