FENG Lu1,SUN Li-jian2(1.Department of Mathematics,Tianjin University of Finance and Economics 300222,China;2.Department of Mathematical Science,Tianjin Unversity Science and Technology 300074,China)
Abstract：It is very important for successor function to judge the number,the stability and the relative place of the limit cycles of the perturbated system.In this paper,the smoothness of successor function in the neighborhood of the singular cycle of the perturba
2008, Vol. 32 