On the existence of Hamiltonians for non-holonomic systems

Details On the existence of Hamiltonians for non-holonomic systems On the existence of Hamiltonians for non-holonomic systems

2007-11-26

arxiv.org/abs/0711.3997v2

Physics

Classical Physics

A printing error in Eq. (22) has been corrected, a few printing errors and obscure sentences have been removed. Dimensional pa

Scientific paper

We consider the question of existence of Hamiltonians for autonomous non-holonomic mechanical systems in this paper. The approach is elementary in the sense that the existence of a Hamiltonian for a given non-holonomic system is considered to be equivalent to the existence of a non-degenerate Lagrangian for the system in question. The possible existence of such a Lagrangian is related to the inverse problem of constructing a Lagrangian from the appropriate equations of motion. A simple example in three dimensions with one non-holonomic constraint is analysed in detail, and it is shown that in this case there is no Lagrangian reproducing the equations of motion in three dimensions. Thus the system does not admit a variational formulation in three dimensions. However, the system in question is equivalent to a two-dimensional system which admits a variational formulation. Two distinct Lagrangians and their corresponding Hamiltonians are constructed explicitly for this two-dimensional system

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