mathnb https://blog.hatena.ne.jp/mathnb/ mathnbのブログ https://nbgb.hatenablog.com/ 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^4-221700 Y^3 Z+328875 Y^2 Z^2-160000 Y Z^3=0 獲た dual-curve を 非斉次化し 其の二重接線を 多様な発想で 求めて… 190 <iframe src="https://hatenablog-parts.com/embed?url=https%3A%2F%2Fnbgb.hatenablog.com%2Fentry%2F2021%2F08%2F17%2F215940" title=" - mathnbのブログ" class="embed-card embed-blogcard" scrolling="no" frameborder="0" style="display: block; width: 100%; height: 190px; max-width: 500px; margin: 10px 0px;"></iframe> Hatena Blog https://hatena.blog 2021-08-17 21:59:40 rich https://nbgb.hatenablog.com/entry/2021/08/17/215940 1.0 100%