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The Orthonormal Dilation Property for Abstract Parseval Wavelet Frames

Published online by Cambridge University Press:  20 November 2018

B. Currey
Department of Mathematics and Computer Science, Saint Louis University, St. Louis, MO 63103, USA e-mail:
A. Mayeli
Mathematics Department, Queensborough College, City University of New York, 222-05 56th Avenue Bayside, NY 11364, USA e-mail:
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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 \left( \Gamma \right)\psi $, where $\pi $ is a unitary representation of a wavelet group and $\Gamma $ is the abstract pseudo-lattice $\Gamma $. We prove a sufficent condition in order that a Parseval frame $\pi \left( \Gamma \right)\psi $ can be dilated to an orthonormal basis of the form $\tau \left( \Gamma \right)\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.

Research Article
Copyright © Canadian Mathematical Society 2013


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