https://math.stackexchange.com/questions/662768/degree-of-the-dual-curve-to-xy2-z3 を 味読し これに倣い ↓のdual-curve を求めて下さい; 16875 X^4+16000 X^3 Y+3300 X^2 Y^2+3750 X^2 Y Z+43140 X Y^3-142500 X Y^2 Z+120000 X Y Z^2+49232 Y^4-22170…

>Google、円周率計算31兆桁達成 世界記録更新 https://www.bbc.com/japanese/47552083 https://www.google.com/search?client=firefox-b-d&q=%E5%86%86%E5%91%A8%E7%8E%8762%E5%85%868000%E5%84%84%E6%A1%81%E8%A8%88%E7%AE%97%E3%80%81%E4%B8%96%E7%95%8C%E…