摘要
从特殊情况研究多项式f(x)=xn+1在有理域Q[x]上的因式分解情况.可以证明:f(x)不可约的充要条件是存在自然数q,使得n=2q;多项式f(x)的因式数不小于n的奇子数加1,即D(f)≥H(n)+1;如果n是素数,那么D(f)=H(n)+1.
Factorization of f(x) = x^n + 1 in rational field Q[x] leads to the following conclusions: a necessary and sufficient condition for f(sc) to be irreducible is that there exists a natural number q such that n = 2q; the factor number of f(sc) is at least one more than the odd factor number of n, i.e. D(f) ≥H(n)+1; ifnisaprime, thenD(f) -= H(n)+1.
出处
《高等数学研究》
2011年第1期29-31,共3页
Studies in College Mathematics