Periodicity and Stability in Periodic n-Species Lotka-Volterra Competition System with Feedback Controls and Deviating Arguments

By using the method of coincidence degree and Lyapunov functional, a set ofeasily applicable criteria are established for the global existence and global asymptotic stabilityof strictly positive (componentwise) periodic solution of a periodic n-species Lotka-Volterracompetition system with feedback controls and several deviating arguments. The problem considered inthis paper is in many aspects more general and incorporate as special cases various problems whichhave been studied extensively in the literature. Moreover, our new criteria, which improve andgeneralize some well known results, can be easily checked.

具分布偏差变元非自治数学生态学方程的全局渐近稳定性

通过构造不等式的方法,进而推广文献[4]和改进文献[5]的相应结果,得出了一类具分布偏差变元非自治微分方程解的渐近稳定性的充分条件,该方程包含了许多时滞生物数学模型。

具分布偏差变元非自治数学生态学方程的全局渐近稳定性

本文研究具分布偏差变元非自治微分方程x＇（t）＝－g（t，x（t））－f（t，x（t＋s）du（s））零解的渐近稳定性．方程（1）包含了许多数学生态学方程．文中结论推广和改进了已有文献中相应结果．

具分布偏差变元的中立型微分方程的全局渐近稳定性

本文考虑具分布偏差变元的微分方程[x（t）- Cx（t-r）]’+ f（t,∫-rx（t+s）du（s））=0,t≥t0,（1）其中 C,r,τ∈R+且0≤C<1,f（t,x）∈ C（〔t0,∞」,R）,xf（t,x）>0,x≠0.通过对方程（1）的非振动解及振动解的渐近性的讨论,获得了方程（1）的全局渐近稳定的充分条件.