2 citations · 3 across the 7 of their papers we have counts for
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math.CA2011
Bifurcations of planar Hamiltonian systems with impulsive perturbation
Zhaoping Hu, Maoan Han, Valery G. Romanovski
In this paper, by means of the Melnikov functions we consider bifurcations of harmonic or subharmonic solutions from a periodic solution of a planar Hamiltonian system under impuls…
math.CA2011
Limit cycle bifurcations from a nilpotent focus or center of planar systems
Maoan Han, Valery G. Romanovski
In this paper, we study the analytical property of the Poincare return map and the generalized focal values of an analytical planar system with a nilpotent focus or center. Then we…
math.CA2011
On the number of limit cycles of polynomial Lienard systems
Maoan Han, Valery G. Romanovski
Lienard systems are very important mathematical models describing oscillatory processes arising in applied sciences. In this paper, we study polynomial Lienard systems of arbitrary…