推 hcsoso:This theorem is proved by Kobayashi, which is not an 11/08 23:56
→ hcsoso:easy result. This may be helpful to you: 11/08 23:56
推 Favonia:某本書收集了很多很難的問題... xD 11/09 08:32
→ suhorng:感謝一樓:) 用至這個當關鍵字搜尋到神奇的東西: 11/09 21:36
→ suhorng: 2010final_sol.pdf 11/09 21:36
→ suhorng:裡面 Problem 5 是這題並有解答... 11/09 21:37
推 Hseuler:老師出這題當期末考的時候全班沒人做出來 11/16 22:05