Spherical Continuous Wavelet Transforms arising from sections of the Lorentz group

Details Spherical Continuous Wavelet Transforms arising from sections of the Lorentz group Spherical Continuous Wavelet Transforms arising from sections of the Lorentz group

2007-06-13

arxiv.org/abs/0706.1956v3

Mathematics

Representation Theory

30 pages, 1 figure

Scientific paper

We consider the conformal group of the unit sphere $S^{n-1},$ the so-called proper Lorentz group Spin$^+(1,n),$ for the study of spherical continuous wavelet transforms (CWT). Our approach is based on the method for construction of general coherent states associated to square integrable group representations over homogeneous spaces. The underlying homogeneous space is an extension to the whole of the group Spin$^+(1,n)$ of the factorization of the gyrogroup of the unit ball by an appropriate gyro-subgroup. Sections on this homogeneous space are constituted by rotations of the subgroup Spin$(n)$ and M\"{o}bius transformations of the type $\phi_a(x)=(x-a)(1+ax)^{-1},$ where $a$ belongs to a given section on a homogeneous space of the unit ball. This extends in a natural way the work of Antoine and Vandergheynst to anisotropic conformal dilations.

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