机译:Level sets as progressing waves: an example for wake-free waves in every dimension
Mathematisches Institut, Universit?t Leipzig, PF 100920, 04009 Leipzig, Germany;
Departament de Química Orgànica, Universitat de Barcelona, Martí i Franquès, 1, 08028 Barcelona, Spain;
Contours; Steepest ascent; Eikonal equation; Wave equation; Huygens' principle;