S. Kurosaki, DETAILED BIFURCATIONS OF PERIODIC-ORBITS WITH THREEFOLD SYMMETRY OF THE HENON-HEILES HAMILTONIAN, Journal of the Physical Society of Japan, 64(10), 1995, pp. 3589-3592
The bifurcation process of periodic orbits of the Henon-Heiles Hamilto
nian system is investigated by calculating residues. Threefold symmetr
y of the system induces bifurcations with triple branches, to which th
e generic bifurcation scheme proposed by Meyer can not be applied. Nor
mal form analysis gives results consistent with numerically observed b
ifurcations.