2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/111724We give a detailed description of the local commutant approach to wavelet theory using operator algebraic methods. We include a new result on interpolation pairs of wavelet sets: Every pair in the generalized Journe family of wavelet sets is an interpolation pair. In the last section, we give a discussion of several open problems on wavelets and frame-wavelets.This is a semi-expository article which was written by the author for the proceedings of the 4th International Conference on Wavelet Analysis and its Applications, Macau, China, December 2005 [WAA2005], as a keynote speaker; 30pFunctional Analysis46C99; 47B99; 46B15text