S;547981281 x^12-2191925124 x^9 y^3-2191925124 x^9 z^3+14326308 x^9+3287887686 x^6 y^6+2191925124 x^6 y^3 z^3-14326308 x^6 y^3+3287887686 x^6 z^6-14326308 x^6 z^3+140454 x^6-2191925124 x^3 y^9+2191925124 x^3 y^6 z^3-14326308 x^3 y^6+2191925124 x^3 y^3 z^6+143263080 x^3 y^3 z^3+93636 x^3 y^3-2191925124 x^3 z^9-14326308 x^3 z^6+93636 x^3 z^3+612 x^3+547981281 y^12-2191925124 y^9 z^3+14326308 y^9+3287887686 y^6 z^6-14326308 y^6 z^3+140454 y^6-2191925124 y^3 z^9-14326308 y^3 z^6+93636 y^3 z^3+612 y^3+547981281 z^12+14326308 z^9+140454 z^6+612 z^3+1=0 なる 代数曲面S を 考察なさった 経験が 在りますか? 初体験でしょうか? S の 双対曲面 S^★;f^★(x,y,z)=0 を多様な発想で求めて下さい! 発想(イ) 発想(ロ) Diophantine equation (不定) equation f^★(x,y,z)=0 を解いて下さい; https://www.youtube.com/watch?v=4aMtJ-V26Z4