Convex Four Body Central Configurations with Some Equal Masses

Details Convex Four Body Central Configurations with Some Equal Masses Convex Four Body Central Configurations with Some Equal Masses

2009-09-26

arxiv.org/abs/0909.4883v1

Archive for Rational Mechanics and Analysis, Volume 185, Number 3 / September, 2007, 481-494

Physics

Mathematical Physics

15 pages, 1 figure

Scientific paper

10.1007/s00205-006-0047-z

We prove that there is a unique convex non-collinear central configuration of the planar Newtonian four-body problem when two equal masses are located at opposite vertices of a quadrilateral and, at most, only one of the remaining masses is larger than the equal masses. Such central configuration posses a symmetry line and it is a kite shaped quadrilateral. We also show that there is exactly one convex non-collinear central configuration when the opposite masses are equal. Such central configuration also posses a symmetry line and it is a rhombus.

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