Partitions of natural numbers with the same representation functions

Partitions of natural numbers with the same representation functions
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具有相同表示函数的自然数的划分

DOI:
10.1016/j.jnt.2009.04.020
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发表时间:
2009-11
影响因子:
0.7
通讯作者:
Chen, Yong-Gao
Chen, Yong-Gao
中科院分区:
数学3区
文献类型:
--
作者:
Tang, Min;Chen, Yong-Gao

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对于非负整数集合A,表示函数R2(A,n),R3(A,n)分别定义为方程n=a+a′,a,a′∈A且a<a′,a ∈ a′的解的个数.令D(0)=0,令D(a)表示a的二进制表示中1的个数。设A0是D(a)为偶数的所有非负整数a的集合,A1是D(a)为奇数的所有非负整数a的集合.本文证明了:(a)若R2(A,n)=R2(N <$A,n),对所有n <$2N −1,则R2(A,n)=R2(N <$A,n)<$1,对所有n <$12N2 − 10 N −2,除了A= A0或A=A1;(B)若R3(A,n)=R3(N <$A,n),对所有n <$2N −1,则R3(A,n)= R3(N <$A,n)<$1,对所有n <$12N2 +2N。本文提出了几个问题。
For a set A of nonnegative integers the representation functions R2(A,n), R3(A,n) are defined as the number of solutions of the equation n=a+a′,a,a′∈A with a<a′, a⩽a′, respectively. Let D(0)=0 and let D(a) denote the number of ones in the binary representation of a. Let A0be the set of all nonnegative integers a with even D(a) and A1be the set of all nonnegative integers a with odd D(a). In this paper we show that (a) if R2(A,n)=R2(N∖A,n) for all n⩾2N−1, then R2(A,n)=R2(N∖A,n)⩾1 for all n⩾12N2−10N−2 except for A=A0or A=A1; (b) if R3(A,n)=R3(N∖A,n) for all n⩾2N−1, then R3(A,n)=R3(N∖A,n)⩾1 for all n⩾12N2+2N. Several problems are posed in this paper.
DOI: 10.4064/aa103-2-3
发表时间: 2002
期刊: Acta Arithmetica
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