Sharp Bound of the Number of Zeros for a Liénard System with a Heteroclinic Loop

[摘要] In the presented paper, the Abelian integral of a Liénard system is investigated, with a heteroclinic loop passing through a nilpotent saddle. By using a new algebraic criterion, we try to find the least upper bound of the number of limit cycles bifurcating from periodic annulus.

[学科分类] 安全、风险、质量和可靠性