Abstract
The fundamental matrix solutionT for the variational equations of a Hamiltonian system is symplectic. We use this fact to completeT when it is only partially known. We discuss three cases. The last one gives an easy proof for the method invented by Brown in his lunar theory.
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Brown, E. W.: 1903,Trans. Am. Math. Soc. 4, 234.
Brown, E. W.: 1908,Mem. Roy. Astron. Soc. 59, 1.
Schmidt, D. S.: 1980,The Moon and the Planets 23, 135.
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Dedicated to Victor Szebehely.
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Meyer, K.R., Schmidt, D.S. The determination of the derivatives in Brown's lunar theory. Celestial Mechanics 28, 201–207 (1982). https://doi.org/10.1007/BF01230673
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DOI: https://doi.org/10.1007/BF01230673