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arXiv math/0504455math.AP
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具有连续初值的抛物型方程

Parabolic equations with continuous initial data

Julie Clutterbuck

摘要:

本文的目的是得到抛物型方程的新的梯度估计。所得到的梯度估计与初始数据的正则性无关。这使我们能够证明具有非光滑连续初始数据的问题的解的存在性。我们包括诺依曼和狄利克雷边界数据的问题的存在性证明。研究的一类方程是仿照图的中曲率流。它包括各向异性的中曲率流,以及其他没有一致非退化界的算子。我们通过三种不同的路径得出类似的估计:“双坐标”方法,检查解决方案和给定障碍的交叉点的方法,以及经典的几何方法。

英文摘要:

The aim of this thesis is to derive new gradient estimates for parabolic equations. The gradient estimates found are independent of the regularity of the initial data. This allows us to prove the existence of solutions to problems that have non-smooth, continuous initial data. We include existence proofs for problems with both Neumann and Dirichlet boundary data. The class of equations studied is modelled on mean curvature flow for graphs. It includes anisotropic mean curvature flow, and other operators that have no uniform non-degeneracy bound. We arrive at similar estimates by three different paths: a 'double coordinate' approach, an approach examining the intersections of a solution and a given barrier, and a classical geometric approach.

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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