The distribution of squarefree numbers.
It is proved that the sequence contains infinite squarefree integers whenever , which improves Rieger’s earlier range .
By using a generating function approach it is shown that the sum-of-digits function (related to specific finite and infinite linear recurrences) satisfies a central limit theorem. Additionally a local limit theorem is derived.
Given a large prime number and a rational function defined over , we investigate the size of the set , where and denote the least positive representatives of and in modulo .
Recently Garashuk and Lisonek evaluated Kloosterman sums K (a) modulo 4 over a finite field F3m in the case of even K (a). They posed it as an open problem to characterize elements a in F3m for which K (a) ≡ 1 (mod4) and K (a) ≡ 3 (mod4). In this paper, we will give an answer to this problem. The result allows us to count the number of elements a in F3m belonging to each of these two classes.