The orthonormal dilation property for abstract Parseval wavelet frames

Details The orthonormal dilation property for abstract Parseval wavelet frames The orthonormal dilation property for abstract Parseval wavelet frames

2010-08-04

arxiv.org/abs/1008.0888v1

Mathematics

Representation Theory

Keywords and phrases: frame, dilation, wavelet, Baumslag-Solitar group, shearlet

Scientific paper

In this work we introduce a class of discrete groups containing subgroups of abstract translations and dilations, respectively. A variety of wavelet systems can appear as $\pi(\G)\psi$, where $\pi$ is a unitary representation of a wavelet group and $\G$ is the abstract pseudo-lattice $\G$. We prove a condition in order that a Parseval frame $\pi(\G)\psi$ can be dilated to an orthonormal basis of the form $\tau(\G)\Psi$ where $\tau$ is a super-representation of $\pi$. For a subclass of groups that includes the case where the translation subgroup is Heisenberg, we show that this condition always holds, and we cite familiar examples as applications.

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