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An oscillation theorem on the additive representative function over N
Journal of Number Theory ( IF 0.7 ) Pub Date : 2020-11-01 , DOI: 10.1016/j.jnt.2020.02.009
Lixia Dai , Hao Pan

Abstract Let A be an infinite non-empty subset of N . For each n ∈ N , define r A , A ( n ) : = | { ( a , b ) : a , b ∈ A , a + b = n } | and R A , A ( n ) : = ∑ j ≤ n r A , A ( j ) . We show that if the function R A , A ( n ) is well-distributed in some sense, then it can't be very well-distributed. Explicitly, if for some constant c > 0 , lim sup n → ∞ | R A , A ( n ) − c n | n 1 4 + ∞ then for some constant δ > 0 , the set { n ∈ N : | R A , A ( n ) − c n | ≥ δ n 1 4 } has a positive lower density. This result implies the well-known Erdős-Fuchs theorem. And the similar generalization for multi-sum is obtained, too.

中文翻译:

N上加性代表函数的振荡定理

Abstract 令 A 是 N 的无限非空子集。对于每个 n ∈ N,定义 r A , A ( n ) : = | { ( a , b ) : a , b ∈ A , a + b = n } | 和 RA , A ( n ) : = ∑ j ≤ nr A , A ( j ) 。我们证明,如果函数 RA , A ( n ) 在某种意义上是良好分布的,那么它就不可能是非常良好分布的。明确地,如果对于某个常数 c > 0 , lim sup n → ∞ | RA , A ( n ) − cn | n 1 4 + ∞ 那么对于某个常数 δ > 0 ,集合 { n ∈ N : | RA , A ( n ) − cn | ≥ δ n 1 4 } 具有正的较低密度。这个结果暗示了著名的 Erdős-Fuchs 定理。并且也得到了对多和的类似推广。
更新日期:2020-11-01
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