
It is well known that there exist wavelet frames \(\{2^{j/2}\psi(2^jx-k)\}_{j,k\in Z}\) for which the canonical dual frame does not have wavelet structure. In this paper the authors find such a frame with the additional property that other duals, which have the wavelet structure, exist; in fact, infinitely many such duals exist. Similar constructions are possible for wavelet frames \(\{2^{j/2}\psi_l(2^jx-k)\}_{j,k\in Z, l=1,\dots,r}\) generated by \(r\) functions. For such a frame, equivalent conditions for the canonical dual frame to be generated by \(2^Jr\) functions (for some \(J=0,1,2,\dots\)) are given.
dual frame, Applied Mathematics, wavelet frame, canonical dual, Nontrigonometric harmonic analysis involving wavelets and other special systems, the canonical dual frame, dual wavelet frame
dual frame, Applied Mathematics, wavelet frame, canonical dual, Nontrigonometric harmonic analysis involving wavelets and other special systems, the canonical dual frame, dual wavelet frame
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