The wavelet dimension function is the trace function of a shift-invariant system

Ron, Amos; Shen, Zuowei

doi:10.1090/S0002-9939-02-06677-7

The wavelet dimension function is the trace function of a shift-invariant system
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by Amos Ron and Zuowei Shen PDF

Proc. Amer. Math. Soc. 131 (2003), 1385-1398 Request permission

Abstract:

In this note, we observe that the dimension function associated with a wavelet system is the trace of the Gramian fibers of the shift-invariant system generated by the negative dilations of the mother wavelets. When this shift-invariant system is a tight frame, each of the Gramian fibers is an orthogonal projector, and its trace, then, coincides with its rank. This connection leads to simple proofs of several results concerning the dimension function, and the arguments extend to the bi-frame case.

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