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Toric section : ウィキペディア英語版 | Toric section A toric section is an intersection of a plane with a torus, just as a conic section is the intersection of a plane with a cone. Special cases have been known since antiquity, and the general case was studied by Jean Gaston Darboux.〔.〕 ==Mathematical formulae== In general, toric sections are fourth-order (quartic) plane curves〔 of the form :
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「Toric section」の詳細全文を読む
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