sage: s=solve(3*x^3-9*x+10==0,x,solution_dict=True) sage: [n(t[x]) for t in s] [1.06780542232902 - 1.84949324407141*I, # 0.0277635108030695 + 1.24902476648341*I, # WRONG! -1.09556893313209 + 0.600468477588001*I] #
sage: s=solve(3*x^3-9*x +10==0,x,solution_dict=True,to_poly_solve='force') sage: [n(t[x]) for t in s] [1.06780542232902 - 0.648556288895405*I, # -2.13561076604555, # POOR PRECISION 1.06780538302277 + 0.648556231003039*I] # sage: x=CC[x].0 sage: p=3*x^3-9*x+10 sage: p.roots(multiplicities=False) [-2.13561084465804, # 1.06780542232902 - 0.648556288895405*I, # O.K 1.06780542232902 + 0.648556288895405*I] # sage: CF=ComplexField(128) # FOR COMPARISON sage: x=CF[x].0 sage: p=3*x^3-9*x+10 sage: p.roots(multiplicities=False) [-2.1356108446580430871649905855660713838, 1.0678054223290215435824952927830356919 - 0.64855628889540511607544685008848221185*I, 1.0678054223290215435824952927830356919 + 0.64855628889540511607544685008848221185*I] Andrzej Chrzeszczyk -- To post to this group, send an email to sage-devel@googlegroups.com To unsubscribe from this group, send an email to sage-devel+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/sage-devel URL: http://www.sagemath.org
