RT Journal Article T1 On the ray-wavefront duality A1 Díaz-Cano Ocaña, Antonio A1 González Gascón, Francisco A1 Sánchez Soto, Luis Lorenzo AB We investigate the behavior of the solutions of the ray equation in isotropic media. We discuss local and global transversals and wavefronts and give examples of rays without wavefronts. PB MDPI SN 2073-8994 YR 2022 FD 2022-03 LK https://hdl.handle.net/20.500.14352/71401 UL https://hdl.handle.net/20.500.14352/71401 LA eng NO © 2022 by the authors.This research was funded by Ministerio de Ciencia, Innovación y Universidades Grant number PGC2018-099183-B-I00. NO Ministerio de Ciencia e Innovación (MICINN) DS Docta Complutense RD 26 abr 2025