If I break the computation into smaller pieces it works OK:
sage: K.<p,d,e,N> = FractionField(PolynomialRing(QQ,4,'pdeN')) > sage: R.<x> = K[] > sage: a = x^3-x^-3 > sage: b = x^5-x^-5 > sage: c = x^8-x^-8 > sage: X = p*a +d*b + e*c > sage: H = R(x^8 * X) > sage: f = H - N*b*c*x^16 > sage: f > -N*x^29 + N*x^19 + e*x^16 + (d + N)*x^13 + p*x^11 - p*x^5 + (-d - N)*x^3 - > e > sage: psi = cyclotomic_polynomial(30) > sage: psi > x^8 + x^7 - x^5 - x^4 - x^3 + x + 1 > sage: f.quo_rem(psi)[1] > -d*x^7 + (p + N)*x^6 + (-p + d + N)*x^5 + (d - N)*x^4 + (-d - 2*N)*x^3 - > N*x^2 + (-p - d - e - N)*x - d - e > -- You received this message because you are subscribed to the Google Groups "sage-support" group. To post to this group, send email to sage-support@googlegroups.com. To unsubscribe from this group, send email to sage-support+unsubscr...@googlegroups.com. Visit this group at http://groups.google.com/group/sage-support?hl=en.