On packing dimension preservation by distribution functions of random   variables with independent $\tilde{Q}$-digits
  The article is devoted to finding conditions for the packing dimension preservation by distribution functions of random variables with independent $\tilde{Q}$-digits. The notion of "faithfulness of fine packing systems for packing dimension calculation" is introduced, and connections between this notion and packing dimension preservation are found. 
Oleksandr Slutskyi
math.PR