PageHeader : Funkcialaj Ekvacioj, 42 (1999) 491-506 Title : The Nonlinear Boundary Value Problem for the Equation of Title : Mixed Type AuthorInfo : By AuthorInfo : Nikolai A. LARKIN AuthorInfo : (Universidade Estadual de Maringa, Brasil) section : 1. Introduction section : 2. Notations and assumptions section : 3. Construction of approximate solutions subsection : Definition 3.1. subsection : 3.2. Solvability of (3.8). subsection : 3.3 The estimate 1. subsection : 3.4. The estimate 2. subsection : 3.5. Existence of approximate solutions. section : 4. Estimates of Galerkin's approximations section : 5. Solvability of the problem (1.1)?(1.3) section : References