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arXiv 0802.2928math.NTmath.CO
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加性碱的性质

Essentialities in additive bases

Peter Hegarty

摘要:

设A是N_0的某阶渐近基。A的本质性是指一个子集P,使得A不再是任何阶的渐近基,并且使得P在A的所有具有此性质的子集中是极小的。A的有限本质性称为本质子集。Deschamps和Farhi在最近的一篇论文中提出了以下两个问题:(i)N_0的每一个渐近基是否都有本质性?(ii)是数量的基本子集的大小最多k的渐近基础的顺序h有界的一个函数的k和h只(他们表明,这个数字总是有限的)?我们回答后者的问题是肯定的,和前者的否定的手段,明确建设,为每一个整数h >= 2,一个渐近的基础秩序h没有本质。

英文摘要:

Let A be an asymptotic basis for N_0 of some order. By an essentiality of A one means a subset P such that A¶is no longer an asymptotic basis of any order and such that P is minimal among all subsets of A with this property. A finite essentiality of A is called an essential subset. In a recent paper, Deschamps and Farhi asked the following two questions : (i) does every asymptotic basis of N_0 possess some essentiality ? (ii) is the number of essential subsets of size at most k of an asymptotic basis of order h bounded by a function of k and h only (they showed the number is always finite) ? We answer the latter question in the affirmative, and the former in the negative by means of an explicit construction, for every integer h >= 2, of an asymptotic basis of order h with no essentialities.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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