Statistics – Applications
Scientific paper
Nov 1975
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1975cemec..12..317b&link_type=abstract
Celestial Mechanics, vol. 12, Nov. 1975, p. 317-325.
Statistics
Applications
6
Celestial Mechanics, Euler-Lagrange Equation, Perturbation Theory, Two Body Problem, Degrees Of Freedom, Equations Of Motion, Lagrange Multipliers, Partial Differential Equations, Redundancy
Scientific paper
It is shown that it is possible to make a change of variables in a Lagrangian in such a way that the number of variables is increased. The Euler-Lagrange equations in the redundant variables are obtained in the standard way (without the use of Lagrange multipliers). These equations are not independent but they are all valid and consistent. In some cases they are simpler than if the minimum number of variables are used. The redundant variables are supposed to be related to each other by several constraints (not necessarily holonomic), but these constraints are not used in the derivation of the equations of motion. The method is illustrated with the well known Kustaanheimo-Stiefel regularization. Some interesting applications to perturbation theory are also described.
Broucke R.
Lass H.
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