Resolution of the Wavefront Set Using General Continuous Wavelet Transforms
Resolution of the Wavefront Set Using General Continuous Wavelet Transforms
复制标题
使用一般连续小波变换的波前集分辨率
DOI:
10.1007/s00041-015-9445-7
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发表时间:
2016
影响因子:
1.2
通讯作者:
Felix Voigtlaender
中科院分区:
文献类型:
--
作者:
Jonathan Fell;Hartmut Führ;Felix Voigtlaender
We consider the problem of characterizing the wavefront set of a tempered distributionin terms of its continuous wavelet transform, where the latter is defined with respect to a suitably chosen dilation group. In this paper we develop a comprehensive and unified approach that allows to establish characterizations of the wavefront set in terms of rapid coefficient decay, for a large variety of dilation groups. For this purpose, we introduce two technical conditions on the dual action of the groupH, calledmicrolocal admissibilityand (weak)cone approximation property. Essentially, microlocal admissibility sets up a systematic relationship between the scales in a wavelet dilated byon one side, and the matrix norm ofhon the other side. The (weak) cone approximation property describes the ability of the wavelet system to adapt its frequency-side localization to arbitrary frequency cones. Together, microlocal admissibility and the weak cone approximation property allow the characterization of points in the wavefront set using multiple wavelets. Replacing the weak cone approximation by its stronger counterpart gives rise to single wavelet characterizations. We illustrate the scope of our results by discussing—in any dimension—the similitude, diagonal and shearlet dilation groups, for which we verify the pertinent conditions. As a result, similitude and diagonal groups can be employed for multiple wavelet characterizations, whereas for the shearlet groups a single wavelet suffices. In particular, the shearlet characterization (previously only established for) holds in arbitrary dimensions.
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DOI:
10.1016/j.jfa.2015.03.019
发表时间:
2014-04
期刊:
arXiv: Functional Analysis
影响因子:
--
作者:
Hartmut Fuhr;F. Voigtlaender
通讯作者:
Hartmut Fuhr;F. Voigtlaender
影响因子:
1.2
作者:
W. Czaja;E. King
通讯作者:
W. Czaja;E. King
影响因子:
2.5
作者:
Candès, EJ;Donoho, DL
通讯作者:
Donoho, DL
DOI:
--
发表时间:
2009
期刊:
影响因子:
--
作者:
P. Grohs
通讯作者:
P. Grohs
DOI:
--
发表时间:
1995
期刊:
影响因子:
--
作者:
S. Moritoh
通讯作者:
S. Moritoh