Hi, I need to determine if a given algebraic number is rational. Here is the setup:
PolynomialRing(ZZ, 'x') A=-2 B=5 f=x^3 + A*x +B D=-4*A^3-27*B^2 L.<c> = NumberField(f) Then I need to know if a given number beta=b0+b1*c+b2*c^2 is rational or not. It tried using K.<s>=QQ.extension(beta.minpoly()) K==QQ but I'm not sure if this is reliable. Thanks, Zach -- 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 For more options, visit this group at http://groups.google.com/group/sage-support URL: http://www.sagemath.org
