A NON LOCAL QUANTITATIVE CHARACTERIZATION OF ELLIPSES LEADING TO A SOLVABLE DIFFERENTIAL RELATION

A NON LOCAL QUANTITATIVE CHARACTERIZATION OF ELLIPSES LEADING TO A SOLVABLE DIFFERENTIAL RELATION
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导致可解微分关系的椭圆的非局部定量表征

DOI:
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发表时间:
2008
期刊:
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影响因子:
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通讯作者:
Roberto Gianni
Roberto Gianni
中科院分区:
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作者:
M. Amar;R. L. Berrone;Roberto Gianni

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在本文中,我们证明除了椭圆之外,不存在域 E ⊂ R,使得 E 与其位似图像 εE 的交集转换为边界点 q ε ∂E 的勒贝格测度与 q 无关,前提是 E 位于某个内部点 O ε E(位似中心)“中心”。类似的问题出现在数学的各个领域,包括例如静止等温面和重排的研究。
In this paper we prove that there are no domains E ⊂ R, other than the ellipses, such that the Lebesgue measure of the intersection of E and its homothetic image εE translated to a boundary point q ∈ ∂E is independent of q, provided thatE is "centered" at a certain interior pointO ∈ E (the center of homothety). Similar problems arise in various fields of mathematics, including, for example, the study of stationary isothermal surfaces and rearrangements.
DOI: --
发表时间: 2006
期刊: Trans.Amer.Math.Soc. 358-11
影响因子: --
作者:
R.Magnanini;J.Prajapat;S.Sakaguchi
通讯作者: S.Sakaguchi