English

Continuous action of Lie groups on $\mathbb{R}^n$ and Frames

Functional Analysis 2007-05-23 v1

Abstract

Wavelet and frames have become a widely used tool in mathematics, physics, and applied science during the last decade. In this article we discuss the construction of frames for L2(Rn)L^2(\R^n) using the action of closed subgroups HGL(n,R)H\subset \mathrm{GL}(n,\mathbb{R}) such that HH has an open orbit \cO\cO in Rn\R^n under the action (h,ω)(h1)T(ω)(h,\omega)\mapsto (h^{-1})^T(\omega). If HH has the form ANRANR, where AA is simply connected and abelian, NN contains a co-compact discrete subgroup and RR is compact containing the stabilizer group of ω\cO\omega\in\cO then we construct a frame for the space L\cO2(Rn)L^2_{\cO}(\R^n) of L2L^2-functions whose Fourier transform is supported in \cO\cO. We apply this to the case where HT=HH^T=H and the stabilizer is a symmetric subgroup, a case discussed for the continuous wavelet transform in a paper by Fabec and Olafsson.

Keywords

Cite

@article{arxiv.math/0304360,
  title  = {Continuous action of Lie groups on $\mathbb{R}^n$ and Frames},
  author = {Gestur Olafsson},
  journal= {arXiv preprint arXiv:math/0304360},
  year   = {2007}
}