Limit cycle bifurcations of some Liénard sytemsYang, Yunmin (Avtor) Han, Maoan (Avtor) Romanovski, Valery (Avtor) mathematicsbifurcationIn this paper we first give some general theorems on the limit cycle bifurcation for near-Hamiltonian systems near a double homoclinic loop or a center as a preliminary. Then we use these theorems to study some polynomial Liénard systems with perturbations and give new lower bounds for the maximal number of limit cycles of these systems.Elsevier20102012-06-07 11:12:09Znanstveno delo35453UDK: 51COBISS_ID: 17455368ISSN pri članku: 0022-247XNUK URN: URN:SI:UM:DK:DMIZGSJMsl