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zbMATH Open
Article . 1989
Data sources: zbMATH Open
Proceedings of the American Mathematical Society
Article . 1989 . Peer-reviewed
Data sources: Crossref
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On the Maximum Density of Minimal Asymptotic Bases

On the maximum density of minimal asymptotic bases
Authors: Nathanson, Melvyn B.; Sárközy, András;

On the Maximum Density of Minimal Asymptotic Bases

Abstract

Eine Menge \(A\subseteq {\mathbb{N}}_0\) heißt asymptotische Basis \(h\)-ter Ordnung, wenn es ein \(N\in\mathbb{N}\) gibt, so daß gilt \(hA\supseteq [N,\infty [\). Eine Menge \(A\subseteq\mathbb{N}_0\) heißt asymptotische Minimalbasis \(h\)-ter Ordnung, wenn keine echte Teilmenge von \(A\) asymptotische Basis \(h\)-ter Ordnung ist. Mit der Anzahlfunktion \(A(x)= \mathrm{card}(\{a\in A\mid 1\leq a\leq x\})\) von \(A\) ist die untere asymptotische Dichte von \(A\) gegeben durch \(d_L(A)=\liminf (A(x)/x).\) Unter Benutzung des Kneserschen Dichtesatzes wird der folgende Satz gezeigt: Sei \(h\geq 2\) und \(A\) eine asymptotische Basis \(h\)-ter Ordnung sowie \(B\subseteq A\) und \(d_L(B)>1/h\). Dann gibt es eine endliche Menge \(F\subseteq A\setminus B\), so daß \(B\cup F\) eine asymptotische Basis \(h\)-ter Ordnung ist. Als Folgerung erhält man den folgenden Satz: Für eine asymptotische Minimalbasis \(A\) \(h\)-ter Ordnung gilt \(d_ L(A)\leq 1/h\).

Keywords

Additive bases, including sumsets, minimal asymptotic bases, Additive number theory; partitions, additive bases, Density, gaps, topology, sumsets

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selected citations
These citations are derived from selected sources.
This is an alternative to the "Influence" indicator, which also reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Citations provided by BIP!
popularity
This indicator reflects the "current" impact/attention (the "hype") of an article in the research community at large, based on the underlying citation network.
BIP!Popularity provided by BIP!
influence
This indicator reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Influence provided by BIP!
impulse
This indicator reflects the initial momentum of an article directly after its publication, based on the underlying citation network.
BIP!Impulse provided by BIP!
0
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