FOCAL SURFACES OF WAVE FRONTS IN THE EUCLIDEAN 3-SPACE
Glasgow mathematical journal, Tome 61 (2019) no. 2, pp. 425-440

Voir la notice de l'article provenant de la source Cambridge University Press

We characterise singularities of focal surfaces of wave fronts in terms of differential geometric properties of the initial wave fronts. Moreover, we study relationships between geometric properties of focal surfaces and geometric invariants of the initial wave fronts.
TERAMOTO, KEISUKE. FOCAL SURFACES OF WAVE FRONTS IN THE EUCLIDEAN 3-SPACE. Glasgow mathematical journal, Tome 61 (2019) no. 2, pp. 425-440. doi: 10.1017/S0017089518000277
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