Analyse de Fourier Analyse harmonique Embeddings (Mathematics) Extrapolation Fourier analysis Function spaces arising in harmonic analysis Functional analysis General General harmonic expansions, frames Harmonic analysis Harmonic analysis in several variables Harmonic analysis on Euclidean spaces Image processing Interpolation between normed linear spaces Linear function spaces and their duals MATHEMATICS Maximal functions, Littlewood-Paley theory Nontrigonometric harmonic analysis Normed linear spaces and Banach spaces; Banach lattices Plongements (Mathématiques) Singular and oscillatory integrals (Calderón-Zygmund, etc.) Sobolev spaces and other spaces of ``smooth'' functions, embedding theorems, trace theorems Spaces of measurable functions ($L^p$-spaces, Orlicz spaces, KÃœthe function spaces, Lorentz spaces, rearrangement invariant spaces, ideal spaces, etc.) Traitement d'images Wavelets and other special systems image processing