k-free数与其逆的差

On the difference of k-free integer and its inverse

运用Kloosterman和、特征和以及三角和的一些基本性质和估计得到了k-free数与其逆的差的一个渐近公式.并且证明了:当k≥2,m≥2,n>2,n∈N,k∈N,m∈N,ε>0时,M(n,m;k)=2φ(n)nm/ζ2(k)(m+1)(m+2)+O(2mnm+1/2+2/(k+1)+2εd(n)σ-1/2(n)σ(n)).特别是当k=2时,有无平方因子数与其逆的差:M(n,m;2)=72φ(n)nm/π4(m+1)(m+2)+O(2mnm+1/2+2/(k+1)+2εd(n)σ-1/2(n)σ(n).此处的d(n)表示因数函数,(n)表示欧拉函数.

By using character sums ,kloosterman sums and some basic properties of the triangle sums ,an asymptotic formula was achieved .And the difference of square free number and its inverse were proved .