POSITIVE PERIODIC SOLUTION OF A NEUTRAL PREDATOR-PREY SYSTEM  

作　　者：李永昆 

出　　处：《Applied Mathematics and Mechanics(English Edition)》1999年第5期117-122,共6页应用数学和力学（英文版）

摘　　要：In this paper, the existence o f a positive periodic solution to the following neutral predator_prey system (t)=rH(t)1-a 1(t)H(t-τ)+a 2(t-τ)K-α(t)H(t)P(t), (t)=-b(t)P(t)+β(t)H(t)P(t) is studied,in which r,a 2,K and τ are positive constants, and a 1(t ),α(t),b(t) and β(t) are positive continuous functions of period ω .In this paper, the existence o f a positive periodic solution to the following neutral predator_prey system (t)=rH(t)1-a 1(t)H(t-τ)+a 2(t-τ)K-α(t)H(t)P(t), (t)=-b(t)P(t)+β(t)H(t)P(t) is studied,in which r,a 2,K and τ are positive constants, and a 1(t ),α(t),b(t) and β(t) are positive continuous functions of period ω .

关 键 词：neutral delay system predator _prey system positive periodic solution topological degree 

分 类 号：O175[理学—数学]