Hostname: page-component-84b7d79bbc-g5fl4 Total loading time: 0 Render date: 2024-08-02T04:32:56.242Z Has data issue: false hasContentIssue false

Planar central configuration estimates in the n-body problem

Published online by Cambridge University Press:  14 October 2010

Christopher K. McCord
Affiliation:
Institute for Dynamics, Department of Mathematics, University of Cincinnati, Ohio, USA

Abstract

For all masses, there are at least n − 2, O2-orbits of non-collinear planar central configurations. In particular, this estimate is valid even if the potential function is not a Morse function. If the potential function is a Morse function, then an improved lower bound, of the order of n! ln(n + 1/3)/2, can be given.

Type
Research Article
Copyright
Copyright © Cambridge University Press 1996

Access options

Get access to the full version of this content by using one of the access options below. (Log in options will check for institutional or personal access. Content may require purchase if you do not have access.)

References

REFERENCES

[1]Brown, K.. Cohomnlogy of Groups. Springer, New York, 1982.CrossRefGoogle Scholar
[2]Cohen, F.. Cohomology of braid spaces. Bull. Amer. Math. Soc. 79 (1973), 761764.CrossRefGoogle Scholar
[3]Fadell, E. and Neuwirth, L.. Configuration spaces. Math. Scand. 10 (1962), 111118.CrossRefGoogle Scholar
[4]James, I.. On category, in the sense of Lusternik-Schnirelmann. mTopology 17 (1978), 331348.CrossRefGoogle Scholar
[5]Hall, G. R. and Meyer, K. R.. Introduction to Hamiltonian Dynamical Systems and the N-body Problem. Springer, New York, 1992.Google Scholar
[6]Moeckel, R.. Relative equilibria of the four-body problem. Ergod. Th. & Dynam. Sys. 5 (1985), 417435.CrossRefGoogle Scholar
[7]Moeckel, R.. On central configurations. Math. Z. 205 (1990), 499517.CrossRefGoogle Scholar
[8]Moulton, F. R.. The straight line solutions of the problem of N bodies. Ann. Math. II Ser. 12 (1910), 117.CrossRefGoogle Scholar
[9]Pacella, F.. Central configurations of the N-body problem via equivariant Morse theory. Arch. Rat. Mech. Anal. 97 (1987), 5974.CrossRefGoogle Scholar
[10]Palmore, J.. Classifying relative equilibria I. Bull. Amer. Math. Soc. 79 (1973), 904908; II Bull. Amer. Math. Soc. 81 (1975), 489–491; III Lett. Math. Phys. 1 (1975), 71–73.CrossRefGoogle Scholar
[11]Xia, Z.. Central configurations with many small masses. J. Diff. Equations 91 (1991), 168179.CrossRefGoogle Scholar