Inverse problem and Bertrand's theorem
Yves Grandati, Alain Bérard, Ferhat Menas
Abstract
The Bertrand's theorem can be formulated as the solution of an inverse problem for a classical unidimensional motion. We show that the solutions of these problems, if restricted to a given class, can be obtained by solving a numerical equation. This permit a particulary compact and elegant proof of Bertrand's theorem.
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