TY - JOUR AU - Liu, Chun-Gen AU - Long, Yiming TI - Hyperbolic characteristics on star-shaped hypersurfaces JO - Annales de l'I.H.P. Analyse non linéaire PY - 1999 DA - 1999/// SP - 725 EP - 746 VL - 16 IS - 6 PB - Gauthier-Villars UR - http://archive.numdam.org/item/AIHPC_1999__16_6_725_0/ UR - https://zbmath.org/?q=an%3A0988.37078 UR - https://www.ams.org/mathscinet-getitem?mr=1720514 LA - en ID - AIHPC_1999__16_6_725_0 ER -