PageHeader : Funkcialaj Ekvacioj, 25 (1982) 283-293 Title : An Optimal Control Problem of the Prey-Predator System AuthorInfo : By AuthorInfo : Setuzo YOSIDA AuthorInfo : (Tokai University, Japan) section : Introduction. section : 1. Preliminaries. section : 2. Cases I and II. section : 3. Case III; the switching time $\tau_{1}$ . section : 4. Value of $\overline{\tau}_{1}$ for the optimal critical response. section : 5. Responses near to the optimal critical response. section : References