Diophantine approximation in Banach spaces

Diophantine approximation in Banach spaces
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Banach 空间中的丢番图近似

DOI:
10.5802/jtnb.871
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发表时间:
2013
期刊:
arXiv: Number Theory
影响因子:
--
通讯作者:
Mariusz Urba'nski
Mariusz Urba'nski
中科院分区:
--
文献类型:
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作者:
Lior Fishman;David Simmons;Mariusz Urba'nski

文献摘要

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本文将同时丢番图逼近理论推广到无穷维情形。此外,我们讨论狄利克雷型定理在一个非常一般的框架,并定义它意味着这样一个定理是最优的。我们表明,最优性是隐含的,但并不意味着存在严重的逼近点。
In this paper, we extend the theory of simultaneous Diophantine approximation to infinite dimensions. Moreover, we discuss Dirichlet-type theorems in a very general framework and define what it means for such a theorem to be optimal. We show that optimality is implied by but does not imply the existence of badly approximable points.