Editing Persistence of a number (section)

==Properties of additive persistence==
* The additive persistence of a number is smaller than or equal to the number itself, with equality only when the number is zero.
* For base <math>b</math> and [[natural number]]s <math>k</math> and <math>n>9</math> the numbers <math>n</math> and <math>n \cdot b^k</math> have the same additive persistence.
More about the additive persistence of a number can be found [https://www.academia.edu/11654065/On_the_additive_persistence_of_a_number_in_base_p here].