| ■No24047に返信(らすかるさんの記事) > 問題が正しいなら > > 従って与えられた等式を満たす実数p,qは、媒介変数tにより > (p,q)=(15cost+15,6sint+3cost+5) (0≦t<2π) > と表される。
ラスカル様に謝辞
ラスカル様に触発され 可算個の R^2 点達(容易)を 求めましたが ソレより制約された Q^2 点達(上より難)を 可算個求めてみました; (代数曲線上に在るか確認を) Out[120]= {{6/13, 8/13}, {375/773, 451/773}, {750/1469, 808/1469}, {375/697, 359/697}, {750/1321, 632/1321}, {3/5, 11/25}, {750/1181, 472/1181}, {375/557, 199/557}, {750/1049, 328/1049}, {375/493, 131/493}, {30/37, 8/37}, {375/433, 71/433}, {750/809, 88/809}, {375/377, 19/377}, {750/701, -(8/701)}, {15/13, -(1/13)}, {750/601, -(88/601)}, {375/277, -(61/277)}, {750/509, -(152/509)}, {375/233, -(89/233)}, {30/17, -(8/17)}, {375/193, -(109/193)}, {750/349, -(232/349)}, {375/157, -(121/157)}, {750/281, -(248/281)}, {3, -1}, {750/221, -(248/221)}, {375/97, -(121/97)}, {750/169, -(232/169)}, {375/73, -(109/73)}, {6, -(8/5)}, {375/53, -(89/53)}, {750/89, -(152/89)}, {375/37, -(61/37)}, {750/61, -(88/61)}, {15, -1}, {750/41, -(8/41)}, {375/17, 19/17}, {750/29, 88/29}, {375/13, 71/13}, {30, 8}, {375/13, 131/13}, {750/29, 328/29}, {375/17, 199/17}, {750/41, 472/41}, {15, 11}, {750/61, 632/61}, {375/37, 359/37}, {750/89, 808/89}, {375/53, 451/53}, {6, 8}, {375/73, 551/73}, {750/169, 1208/169}, {375/97, 659/97}, {750/221, 1432/221}, {3, 31/5}, {750/281, 1672/281}, {375/157, 899/157}, {750/349, 1928/349}, {375/193, 1031/193}, {30/17, 88/17}, {375/233, 1171/233}, {750/509, 2488/509}, {375/277, 1319/277}, {750/601, 2792/601}, {15/13, 59/13}, {750/701, 3112/701}, {375/377, 1639/377}, {750/809, 3448/809}, {375/433, 1811/433}, {30/37, 152/37}, {375/493, 1991/493}, {750/1049, 4168/1049}, {375/557, 2179/557}, {750/1181, 4552/1181}, {3/5, 19/5}, {750/1321, 4952/1321}, {375/697, 2579/697}, {750/1469, 5368/1469}, {375/773, 2791/773}, {6/13, 232/65}} (無数に有理点を得ることができます)
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