具有HollingⅡ型功能性反应的三种群生态系统正平衡点的存在性

EXISTENCE UNIQUENESS OF PLUS EQUIL- BRIUM ABOUT THREE INTEACTING PREDA- TOR-PREY ECOSYSTEM WITH HOLLING Ⅱ- TYPE FUNCTIONAL RESPONSE

对于ｎ维（ｎ≥３）生态系统，常常是在正平衡点存在唯一的条件下分析其性质￣［１，２，３］；文［３］把具有功能性反应的三维生态系统分成五类，讨论了它们的有界性和稳定性；本文讨论了［３］中这些生态系统正平衡点的存在性和唯一性。

For n(n≥3)species ecosystem,we analyze its nature under existence uniguenessof plus equilbrium[1,2,3]; The three species ecosystem with functional Presponse is divided intofive types and their boundedness and stability are discussed in[3].In this paper,we discuss theesistence unigueness of these ecosystem’s plus equilbriam in[3]。