Sur la construction des solutions de seconde espèce dans le problème plan restreint des trois corps
Dans un espace linéaire -fois étendu on peut introduire à l’aide de deux fonctions une certaine métrique (les propriétés de ces fonctions étant précisées dans l’article présenté), les courbes géodésiques au sens de centre métrique sont par le système correspondant des équations différentielles d’ordre deux sous les conditions initiales globalement déterminées. Dans le cas et pour une élection simple des fonctions considérées les sourbes géodésiques correspondent aux trajectories d’un point matériel...
The paper has been presented at the 12th International Conference on Applications of Computer Algebra, Varna, Bulgaria, June, 2006Free-fall equal-mass three-body systems are numerically studied using symbolic dynamics. We scan the two-dimensional homology map of initial configurations in steps of 0.001 along both axes. States of binary and triple encounters as well as changes of configuration are used to construct symbolic sequences. Symbolic sequences are characterized by Shannon and Markov entropies....
In this paper we derive general equations for constraint Noethertype symmetries of a first order non-holonomic mechanical system and the corresponding currents, i.e. functions constant along trajectories of the nonholonomic system. The approach is based on a consistent and effective geometrical theory of nonholonomic constrained systems on fibred manifolds and their jet prolongations, first presented and developed by Olga Rossi. As a representative example of application of the geometrical theory...
In this paper we study the problem of the car with N trailers. It was proved in previous works ([9], [12]) that when each trailer is perpendicular with the previous one the degree of nonholonomy is Fn+3 (the (n+3)-th term of the Fibonacci's sequence) and that when no two consecutive trailers are perpendicular this degree is n+2. We compute here by induction the degree of non holonomy in every state and obtain a partition of the singular set by this degree of non-holonomy. We give also for...