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arXiv math/0612846math.APcs.NAmath.NA
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流形上几何兼容双曲守恒律的适定性理论

Well-posedness theory for geometry compatible hyperbolic conservation laws on manifolds

Matania Ben-Artzi, Philippe G. LeFloch

AI总结:

针对流形上的非线性双曲守恒律,通过推广Kruzkov和DiPerna的欧氏理论,建立了熵解的适定性理论,并特别关注几何兼容守恒律的Lp估计。

摘要:

受许多应用(地球物理流、广义相对论)的启发,我们尝试为定义在(黎曼或洛伦兹)流形上的非线性双曲守恒律的熵解研究奠定基础。守恒律的通量被视为流形上的向量场,并依赖于作为参数的未知函数。我们引入了有界可测函数类和测度值映射类中的熵解概念。通过推广最初在欧氏背景下发展的Kruzkov和DiPerna理论,我们建立了流形上守恒律的适定性理论。我们称之为几何兼容的守恒律类被单独列出作为一个重要的感兴趣情形,它导致稳健的、与流形几何无关的Lp估计。另一方面,一般守恒律仅具有L1压缩性质,并导致唯一的压缩熵解半群。我们的框架允许我们通过消失扩散方法或有限体积方法在流形上构造熵解。

英文摘要:

Motivated by many applications (geophysical flows, general relativity), we attempt to set the foundations for a study of entropy solutions to nonlinear hyperbolic conservation laws posed on a (Riemannian or Lorentzian) manifold. The flux of the conservation laws is viewed as a vector-field on the manifold and depends on the unknown function as a parameter. We introduce notions of entropy solutions in the class of bounded measurable functions and in the class of measure-valued mappings. We establish the well-posedness theory for conservation laws on a manifold, by generalizing both Kruzkov's and DiPerna's theories originally developed in the Euclidian setting. The class of {\sl geometry-compatible} (as we call it) conservation laws is singled out as an important case of interest, which leads to robust $L^p$ estimates independent of the geometry of the manifold. On the other hand, general conservation laws solely enjoy the $L^1$ contraction property and leads to a unique contractive semi-group of entropy solutions. Our framework allows us to construct entropy solutions on a manifold via the vanishing diffusion method or the finite volume method.

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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