Tracheotomy
发表于 2025-3-25 04:31:39
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山顶可休息
发表于 2025-3-25 11:32:10
Factoring the Lunar Problem: Geometry, Dynamics, and Algebra in the Lunar Theory from Kepler to Claiaratus could get top-heavy. Tycho Brahe, for one was bothered by geometrical complication. Here is his theory (Fig. 1.1), developed during the 1590s, for the two main inequalities in the Moon’s longitude.
Glower
发表于 2025-3-25 15:28:50
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原谅
发表于 2025-3-25 18:11:23
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Cultivate
发表于 2025-3-25 23:13:45
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Resign
发表于 2025-3-26 02:49:40
https://doi.org/10.1007/978-90-481-3009-2amical equations, the procedure synchronizes the motions of the perturbed system onto those of the unperturbed part. The method is most useful when the unperturbed part has solutions in non-elementary functions. Applications of the method are described.
蒸发
发表于 2025-3-26 06:36:50
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prostate-gland
发表于 2025-3-26 12:13:10
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SPASM
发表于 2025-3-26 16:12:30
https://doi.org/10.1007/978-94-011-9522-5). In the Poincaré compactification of some .-body problems the critical points which appear there are extremely degenerate. In this paper we focus our attention on generic properties of arbitrary Hamiltonian polynomial vector fields, especially at infinity.
GROSS
发表于 2025-3-26 20:45:23
https://doi.org/10.1007/978-1-349-19731-6 normal form techniques adapted to a slightly generalized version of the DiPerna-Lions theory of generalized flows for ODEs . By specializing to the case of Hamiltonian vector fields, we obtain an interesting and somewhat surprising result for Hamiltonians of low regularity, as well as a reason for including this article in these proceedings.