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Stumpff function : ウィキペディア英語版 | Stumpff function In celestial mechanics, the Stumpff functions ''c''''k''(''x''), developed by Karl Stumpff, are used for analyzing orbits using the universal variable formulation. They are defined by the formula: : for The series above converges absolutely for all real ''x''. By comparing the Taylor series expansion of the trigonometric functions sin and cos with ''c''0(''x'') and ''c''1(''x''), a relationship can be found: : : Similarly, by comparing with the expansion of the hyperbolic functions sinh and cosh we find: : : The Stumpff functions satisfy the recursive relations: : ==References==
抄文引用元・出典: フリー百科事典『 ウィキペディア(Wikipedia)』 ■ウィキペディアで「Stumpff function」の詳細全文を読む
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