摘要
In the study of the number of limit cycles of near-Hamiltonian systems,the first order Melnikov function plays an important role.This paper aims to generalize Horozov-Iliev’s method to estimate the upper bound of the number of zeros of the function.
基金
supported by National Natural Science Foundation of China(Grant Nos.11931016 and 11771296)
Hunan Provincial Education Department(Grant No.19C1898).
