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arXiv 1206.0463math.FA
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Dirichlet空间中的热核生成框架

Heat kernel generated frames in the setting of Dirichlet spaces

Thierry Coulhon, Gerard Kerkyacharian, Pencho Petrushev

摘要:

由Rd上近似指数局部化的带限函数组成的小波基和框架是调和分析中的一个强有力的工具,它使各种函数和分布的空间更易于研究和利用,并提供Rd上自然函数空间(例如Besov空间)的稀疏表示。这样的标架在球面上也是可用的,在更一般的齐性空间中,在区间和球上也是可用的。本文的目的是在Dirichlet空间的一般背景下,利用加倍测度和局部尺度不变的Poincaré不等式,得到带限良定域框架,从而得到具有小时间Gaussian界和Hölder连续性的热核.作为这种构造的一个应用,带限框架在李群或具有多项式体积增长的齐性空间、具有里奇曲率的完备黎曼流形和满足体积加倍性质以及其他设置的背景下得到了发展。新的框架用于分解的Besov空间在这个一般的设置。

英文摘要:

Wavelet bases and frames consisting of band limited functions of nearly exponential localization on Rd are a powerful tool in harmonic analysis by making various spaces of functions and distributions more accessible for study and utilization, and providing sparse representation of natural function spaces (e.g. Besov spaces) on Rd. Such frames are also available on the sphere and in more general homogeneous spaces, on the interval and ball. The purpose of this article is to develop band limited well-localized frames in the general setting of Dirichlet spaces with doubling measure and a local scale-invariant Poincaré inequality which lead to heat kernels with small time Gaussian bounds and Hölder continuity. As an application of this construction, band limited frames are developed in the context of Lie groups or homogeneous spaces with polynomial volume growth, complete Riemannian manifolds with Ricci curvature bounded from below and satisfying the volume doubling property, and other settings. The new frames are used for decomposition of Besov spaces in this general setting.

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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