Frames, modular functions for shift-invariant subspaces and FMRA wavelet frames
Frames, modular functions for shift-invariant subspaces and FMRA wavelet frames
We introduce the concept of the modular function for a shift-invariant subspace that can be represented by normalized tight frame generators for the shift-invariant subspace and prove that it is independent of the selections of the frame generators for the subspace. We shall apply it to study the connections between …