→ Sfly :cyclotomic polynomials are irr 04/24 09:24
推 calvin4 :let x = t^4. then the polynomial becomes x^2 - x 04/24 12:13
→ calvin4 :+ 1, which is irreducible over Q. the rest of the 04/24 12:14
→ calvin4 :proof is left to you. 04/24 12:15
推 wickeday :好奇樓上的方法要怎麼做，t^4-1是reducible但x-1是 04/24 14:55
→ wickeday :irreducible說。 04/24 14:56
→ calvin4 :我好像搞錯題型了。你說得對…… 04/25 02:27