We study the limit cycle bifurcations perturbing a class of quartic linear-like Hamiltonian systems having an elementary center at the origin. First, using methods of the qualitative theory, all possible phase portraits of the unperturbed system are found. Then, using the first order Melnikov function, Hopf bifurcation problem of the perturbed system is investigated, and an upper bound for the function is obtained near the origin.
Yanqin XIONG
,
Guangping HU
. HOPF BIFURCATION PROBLEM BY PERTURBING A CLASS OF QUARTIC LINEAR-LIKE HAMILTONIAN SYSTEMS[J]. Acta mathematica scientia, Series B, 2025
, 45(3)
: 1169
-1187
.
DOI: 10.1007/s10473-025-0322-4
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