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arXiv 2603.09459math.DGmath.FAmath.MG
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非线性勒贝格空间:曲线与几何

Nonlinear Lebesgue spaces: Curves and geometry

Université Paris Cité(巴黎西岱大学);CNRS(法国国家科学研究中心)

Guillaume Sérieys

AI总结:

本文研究非线性勒贝格空间的几何与分析性质,通过非线性弗比尼-勒贝格定理的推广,定义了绝对连续曲线的速度,并描述了空间的长度结构和阿莱克山德罗夫曲率界。

摘要:

本文是作者与合作者系列研究的第二篇,致力于研究非线性勒贝格空间的几何与分析性质,即映射值域为任意度量空间的L^p空间。本文正式描述了这些空间的几何性质——其长度结构、阿莱克山德罗夫曲率的界以及在缺乏微分结构的情况下绝对连续曲线的速度定义。为了获得这种点描述,我们首先证明了一个非线性弗比尼-勒贝格定理的非线性类比,这导致了非线性勒贝格空间中L^p曲线被识别为映射到L^p曲线空间的映射。这种识别使得绝对连续曲线的类似识别成为可能,从而推导出非线性勒贝格空间几何性质的点描述。

英文摘要:

This paper is the second in a series by the author and collaborators devoted to the study of geometric and analytic properties of nonlinear Lebesgue spaces, that is, L^p spaces of mappings taking values in arbitrary metric spaces. The present article formalizes the pointwise description of their geometric properties---their length structure, bounds on their Alexandrov curvature as well as the definition of a velocity for absolutely continuous curves despite the lack of differential structure. To obtain this pointwise description, we first prove a nonlinear analogue of the Fubini--Lebesgue theorem, which yields an identification of L^p curves in nonlinear Lebesgue spaces with mappings taking values in the space of L^p curves. This identification of L^p curves then enables a similar identification for absolutely continuous curves, from which the pointwise description of the geometric properties of nonlinear Lebesgue spaces follows.

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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