Ivan Hristov, Radoslava Hristova, Veljko Dmitrašinović, Kiyotaka Tanikawa
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Li and Liao announced (New Astron 70:22–26, 2019, arXiv:1805.07980v1) discovery of 313 periodic collisionless orbits’ initial conditions (i.c.s), 30 of which have equal masses, and 18 of these 30 orbits have physical periods (scale-invariant periods) \(T^{*}<80\). We revisited this work with the intention to improve both, its logical consistency and the numerical efficiency of the method. We have conducted a new search for periodic free-fall orbits, limited to the equal-mass case. Our search produced 24,582 i.c.s of equal-mass periodic orbits with scale-invariant period \(T^{*}<80\), corresponding to 12,409 distinct solutions, 236 of which are self-dual.
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