A Note on the Nonlinear Stability of Equilibrium Points in the Planar Equilateral Restricted Mass-Unequal Four-Body Problem

This note follows up on the study in the paper [Zepeda Ramirez et al., 2021], where we investigate the nonlinear stability of equilibrium points for the planar restricted equilateral four-body problem for the specific values of masses m(1) = 0.01 and 0.99 of the primary, fixed on the horizontal axis. We give an improvement of the previous results.