Mathematics – Representation Theory
Scientific paper
2010-08-04
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.
Currey by Bradley
Mayeli Azita
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