On the number of pairs of positive integers such that is squarefree
arXiv:1007.0353
Abstract
It is not difficult to find an asymptotic formula for the number of pairs of positive integers such that is squarefree. In the present paper we improve the estimate for the error term in this formula using the properties of certain exponential sums. A.Weils's estimate for the Kloosterman sum plays the major role in our analysis.