English

Joint Poisson distribution of prime factors in sets

Number Theory 2022-07-05 v3

Abstract

Given disjoint subsets T1,,TmT_1,\ldots,T_m of "not too large" primes up to xx, we establish that for a random integer nn drawn from [1,x][1,x], the mm-dimensional vector enumerating the number of prime factors of nn from T1,,TmT_1,\ldots,T_m converges to a vector of mm independent Poisson random variables. We give a specific rate of convergence using the Kubilius model of prime factors. We also show a universal upper bound of Poisson type when T1,,TmT_1,\ldots,T_m are unrestricted, and apply this to the distribution of the number of prime factors from a set TT given that nn has kk total prime factors.

Keywords

Cite

@article{arxiv.2006.12650,
  title  = {Joint Poisson distribution of prime factors in sets},
  author = {Kevin Ford},
  journal= {arXiv preprint arXiv:2006.12650},
  year   = {2022}
}

Comments

v3. Improved the range of k in Theorem 4. Added several references to related work. To appear in the Math. Proc. Cambridge Phil. Soc