Sur une approximation des champs propagés par les équations de Maxwell instationnaires, homogènes, à l'extérieur d'un domaine borné

This Note is devoted to obtaining an approximate integral formula giving the value of the electromagnetic field at a space-time point from values measured on a polyedral surface F. The main result leads to time-localized calculations, geometrically split in space along the adaptative parts of F, and optimisable as a function of the point's distance. To cite this article: V. Mouysset, C. R. Acad. Sci. Paris, Ser. I 341 (2005).