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arXiv 1602.04731math.NT
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极值数及其平方和立方的逼近

Approximation to an extremal number, its square and its cube

Johannes Schleischitz

摘要:

研究Roy定义的极值数的连续幂的有理逼近性质.对于$n\in{\{1,2\}}$,已经建立了与极值数$ζ$相连的经典近似常数$λ_{n}(ζ),\hatλ_{n}(ζ),w_{n}(ζ),\hat{w}_{n}(ζ)$,事实上已知的更多。然而,到目前为止,人们对$n\geq 3$几乎一无所知。本文确定了$n=3$的所有经典近似常数。我们的方法将更普遍地提供详细的信息,由施密特和Summerer分配到一个极值数,它的平方和立方定义的组合图。我们也提供了$n=4$的一些结果。在证明主要结果的过程中,我们建立了Khintchine迁移不等式与一致逼近之间的一种非常普遍的联系。

英文摘要:

We study rational approximation properties for successive powers of extremal numbers defined by Roy. For $n\in{\{1,2\}}$, the classic approximation constants $λ_{n}(ζ),\hatλ_{n}(ζ),w_{n}(ζ),\hat{w}_{n}(ζ)$ connected to an extremal number $ζ$ have been established and in fact much more is known. However, so far almost nothing had been known for $n\geq 3$. In this paper we determine all classic approximation constants as above for $n=3$. Our methods will more generally provide detailed information on the combined graph defined by Schmidt and Summerer assigned to an extremal number, its square and its cube. We provide some results for $n=4$ as well. In the course of the proof of the main results we establish a very general connection between Khintchine's transference inequalities and uniform approximation.

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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