On sums and differences of two coprime kth powers
The main purpose of this paper is to study the hybrid mean value of and Gauss sums by using the estimates for trigonometric sums as well as the analytic method. An asymptotic formula for the hybrid mean value of and Gauss sums will be proved using analytic methods and estimates for trigonometric sums.
A natural number is said to be a -integer if , where and is not divisible by the th power of any prime. We study the distribution of such -integers in the Piatetski-Shapiro sequence with . As a corollary, we also obtain similar results for semi--free integers.
In this paper, we give a new upper-bound for the discrepancyfor the sequence , when and .