The aim of this survey ori the theory of wavelets is to help the scientific community to use wavelets as an alternative to the standard Fourier analysis. This survey is a written and extended version of a lecture I have been asked to give at the international conference held at Marseille on ondelettes, méthodes temps-fréquences et espaces des phases (December 14–18, 1987). This conference was a remarkable success. People with distinct scientific educations could communicate and interact, using the new born concept of wavelets. As often the flexibility of the concept helped a lot and during the lunches and dinners, physicians, physicists and even mathematicians were surprised and delighted to understand each other. Now my task is less pleasant and I have to do my job, giving precise definitions and describing specific algorithms. The advantage will be to prepare the ground for programming these algorithms.
KeywordsConvolution Sine Stein Acoustics Metaphor
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