The asymptotic behavior of limit-periodic functions on primes and an   application to k-free numbers
  We use the circle method to evaluate the behavior of limit-periodic functions on primes. For those limit-periodic functions that satisfy a kind of Barban-Davenport-Halberstam condition and whose singular series converge fast enough, we can evaluate their average value on primes. As an application, this result is used to show how tuples of different k-free numbers behave when linear shifts are applied. 
Markus Hablizel
math.NT