Supported by the Natural Science Foundation of Fujian Province(Z0511052,2006J0209);the Foundation of Fujian Education Department(JA04158,JA04274)and the Foundation of Developing ScienceTechnology of Fuzhou University(2005-QX-20)
This paper studies a class of quartic system which is more general and realistic than the quartic accompanying system.x'=-y+ex+lx^2+mxy+ny^2,y'=x(1-Ay)(1+Cy^2),(*)where C 〉 0. Sufficient conditions are ...
目的研究谢向东,陈凤德的论文Uniqueness of limit cycles and quality of infinite criticalpoint for a class of cubic system(Ann Diff Eqs,2005,21(3):474-479)的遗留问题,是该文的继续。方法采用定性与定量的分析方法。结果完整...