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We have investigated the nonlinear stability of the triangular libration point L4 in the R3BP when the smaller primary is a heterogeneous spheroid with three layers having different densities. We observe that in the nonlinear sense, the triangular libration is stable in the range of linear stability 0<μ<μc, a critical value of mass parameter μ, except for three mass ratios μ 1 ′...
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