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arXiv 0709.1975math.APmath.CA
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基于Laplacian热核和特征函数的泛局部参数化

Universal local parametrizations via heat kernels and eigenfunctions of the Laplacian

Peter W. Jones, Mauro Maggioni, Raanan Schul

摘要:

我们使用拉普拉斯算子的热核或本征函数来构造大类欧几里得整环和黎曼流形上的局部坐标(不一定光滑,例如具有$\mathcal{C}^α$度量)。这些坐标在域或流形的嵌入球上是双李普希茨,其畸变常数仅取决于域或流形的自然几何性质。这些结果的证明依赖于估计,从上到下,热核及其梯度,以及拉普拉斯算子的本征函数及其梯度。这些估计在非光滑类中成立,并且对于该类中的扰动是稳定的。最后,这些坐标系是内在的,可有效计算,具有应用价值.

英文摘要:

We use heat kernels or eigenfunctions of the Laplacian to construct local coordinates on large classes of Euclidean domains and Riemannian manifolds (not necessarily smooth, e.g. with $\mathcal{C}^α$ metric). These coordinates are bi-Lipschitz on embedded balls of the domain or manifold, with distortion constants that depend only on natural geometric properties of the domain or manifold. The proof of these results relies on estimates, from above and below, for the heat kernel and its gradient, as well as for the eigenfunctions of the Laplacian and their gradient. These estimates hold in the non-smooth category, and are stable with respect to perturbations within this category. Finally, these coordinate systems are intrinsic and efficiently computable, and are of value in applications.

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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