PageHeader : Funkcialaj Ekvacioj, 32 (1989) 157-162 Title : Remarks on Characteristics of Partial Differential Title : Equations of First Order AuthorInfo : By AuthorInfo : Mikio TSUJI and Li Ta-tsien AuthorInfo : (Kyoto Sangyo University, Japan and Fudan University, China) section : 1. Introduction section : 2. Example section : 3. Quasilinear equation section : 4. General nonlinear equations of first order section : References