环境污染中三维Volterra互惠系统持续生存与绝灭的阈值

The Threshold of Persistence and Extinction for System of Three dimensional Volterra Mutualictic System in a Polluted Environment

给出了在环境容量很大且被污染的情况下 ,三维

This paper studies a three dimensional Volterra mutualictic system in a large capacity polluted enviroment.We obtain the thresholds between survival and extinction for every populations of three-dimensional Volterra system.