52 citations · 149 across the 18 of their papers we have counts for
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math.DS2009★ 22 cited
Brake subharmonic solutions of first order Hamiltonian systems
Chong Li, Chungen Liu
In this paper, we mainly use the Galerkin approximation method and the iteration inequalities of the -Maslov type index theory to study the properties of brake subharmonic solut…
math.DS2009★ 4 cited
Minimal period estimates for brake orbits of nonlinear symmetric Hamiltonian systems
Chungen Liu
In this paper, we consider the minimal period estimates for brake orbits of nonlinear symmetric Hamiltonian systems. We prove that if the Hamiltonian function $H\in C^2(\Bbb R^{2n}…
math.SG2009★ 6 cited
Iteration theory of -index and Multiplicity of brake orbits
Chungen Liu, Duanzhi Zhang
In this paper, we first establish the Bott-type iteration formulas and some abstract precise iteration formulas of the Maslov-type index theory associated with a Lagrangian subspac…