PageHeader : Funkcialaj Ekvacioj, 32 (1989) 429-437 Title : Existence of Optimal Controls for Title : Nonlinear Distributed Parameter Systems AuthorInfo : By AuthorInfo : Nikolaos S. PAPAGEORGIOU* AuthorInfo : (University of California, U. S. A.) section : 1. Introduction section : 2. Existence of optimal pairs section : 3. Relaxation section : References