| The n-th cyclotomic polynomial is the monic polynomial whose roots are the primitive n-th roots of unity. That is where φ(n) is the Euler totient function. Let A(n) be the largest absolute value of the coefficients of n-th cyclotomic polynomial Φn(x).Let7≤p<g<r be odd primes such that q=kp+1and4r≡1(mod pq), where k is a positive integer. If p=1(mod4) and κ>4or p≡1(mod4) and κ>2, then a(pqr,pqr-5gr+q+r+1)=2.Next, let denote the n-th cyclotomic polynomial and φ(n) is the Euler totient function. Let3<q<r be primes, then we establish property of all coefficients of Ψ3qr(x). |
