supported by the National Natural Science Foundation of China(No.11201086 and No.11301105)
In this paper, we study the local bifurcation of critical periods near the nondegenerate center (the origin) of a class of Li@nard equations with degree 2n, and prove that at most 2n - 2 critical periods (taken int...
Project supported by the National Natural Science Foundation of China(Nos.11226152,11201086);the Science and Technology Foundation of Guizhou Province(No.[2012]2167);the Foundation for Distinguished Young Talents in Higher Education of Guangdong(No.2012LYM_0087);the Talent Project Foundation of Guizhou University(No.201104)
This paper is concerned with limit cycles which bifurcate from a period annulus of a quadratic reversible Lotka-Volterra system with sextic orbits.The authors apply the property of an extended complete Chebyshev syste...
supported by National Natural Science Foundation of China (Grant Nos.11126318, 11201086 and 11171355) ;the Ph.D. Programs Foundation of Ministry of Education of China (GrantNo. 20100171110040)
This paper is concerned with the quadratic perturbations of a one-parameter family of quadratic reversible system, having a center of genus one. The exact upper bound of the number of limit cycles emerging from the pe...