%0 Journal Article
%T An English Translation of BertrandĄŻs Theorem
%A F. C. Santos
%A V. Soares
%A A. C. Tort
%J Latin-American Journal of Physics Education
%D 2011
%I Instituto Polit¨Ścnico Nacional, Latin American Physics Education Network
%X A beautiful theorem due to J. L. F. Bertrand concerning the laws of attraction that admit bounded closed orbits for arbitrarily chosen initial conditions is translated from French into English.
%K Classical Mechanics
%K Orbits
%U http://www.lajpe.org/dec11/LAJPE_600_Alexander_Tort_preprint_corr_f.pdf