Sharp Bound Of The Number Of Zeros For A Lienard System With A Heteroclinic Loop

DISCRETE DYNAMICS IN NATURE AND SOCIETY（2021）

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摘要

In the presented paper, the Abelian integral I(h) of a Lienard 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.

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liénard system,zeros

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