Liqin Zhao

activity

20172023

most citedOn the number of zeros of Abelian integrals for discontinuous quadratic differential systems

1 citations · 1 across the 10 of their papers we have counts for

collaborators

Showing 2019Show all

2 papers · 1 filter

math.DS2019

On the number of limit cycles for polycycles $S^{(2)}$ and $S^{(3)}$ in quadratic Hamilton systems under perturbations of piecewise smooth polynomials

Jiaxin Wang, Liqin Zhao

In this paper, by using Picard-Fuchs equations and Chebyshev criterion, we study the bifurcate of limit cycles for quadratic Hamilton system $S^{(2)}$ and $S^{(3)}$ : $\dot{x}= y+2a…

math.DS2019

Bifurcation of limit cycles from the global center of a class of integrable non-Hamilton system under perturbations of piecewise smooth polynomials

Shiyou Sui, Liqin Zhao

In this paper, we perturb the global center of the planar polynomial vector fields $X (x, y) = (- y (x^{2} + a^{2}), x (x^{2} + a^{2}))$ ( $a \neq = 0$ ) inside cubic piecewise smooth polynomials…

On the number of limit cycles for polycycles S(2) and S(3) in quadratic Hamilton systems under perturbations of piecewise smooth polynomials

Bifurcation of limit cycles from the global center of a class of integrable non-Hamilton system under perturbations of piecewise smooth polynomials

On the number of limit cycles for polycycles $S^{(2)}$ and $S^{(3)}$ in quadratic Hamilton systems under perturbations of piecewise smooth polynomials