研究了一类带Beddington-DeAngelis反应项的捕食-食饵模型的共存态问题.利用谱分析和分歧理论的方法,分别以a,c为分歧参数,讨论了发自半平凡解的局部分支解的存在性,并将局部分支延拓为整体分支,从而得到正平衡解存在的充分条件;同时判定了局部分支解的稳定性.
The coexistence state of the predator-prey model with Beddington-DeAngelis functional response is studied. The existence of positive solutions to this system is derived by making use of local and global bifurcation theories. Moreover, the stability of bifurcation solutions is presented by linear eigenvalue perturbation theory.