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arXiv 2603.03549math.FA
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保持顺序的Hadamard空间值Lipschitz映射扩展

Order-Preserving Extensions of Hadamard Space-Valued Lipschitz Maps

Courant Institute of Mathematical Sciences, New York University(纽约大学库朗数学科学研究所);Department of Economics and Courant Institute of Mathematical Sciences, New York University(纽约大学经济学系与库朗数学科学研究所)

Edoardo Gargiulo Efe A. Ok

AI总结:

本文研究了在Hadamard空间中保持顺序的Lipschitz映射扩展问题,发现当维度大于等于2时,只有在特定条件下才能保持单调性,从而推翻了Kirszbraun定理的顺序理论扩展可能性。

摘要:

我们研究将部分有序Hilbert空间X的子集映射到Hadamard poset Y的任何保持顺序的Lipschitz函数的扩展问题,要求不增加其Lipschitz常数并保持其单调性。当X是一维时,这种扩展总是可能的。然而,当dim X至少为2且Y满足一些相对较弱的条件时,这成立当且仅当X的顺序是平凡的。Y的条件由任何Hilbert poset满足。因此,作为我们主要结果的特例,我们发现不存在顺序理论意义上的Kirszbraun定理的推广。

英文摘要:

We study the problem of extending any order-preserving Lipschitz function that maps a subset of a partially ordered Hilbert space X into a Hadamard poset Y without increasing its Lipschitz constant and preserving its monotonicity. This sort of an extension is always possible when X is one-dimensional. However, when dim X is at least 2 and Y satisfies some fairly weak conditions, it holds (universally) if and only if the order of X is trivial. The conditions on Y are satisfied by any Hilbert poset. Therefore, as a special case of our main result, we find that there is no order-theoretic generalization of Kirszbraun's theorem.

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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