Status: New Owner: ---- Labels: Type-Defect Priority-Medium New issue 1439 by smichr: polynomial solution missing real roots http://code.google.com/p/sympy/issues/detail?id=1439
The equation -1936 - 5056*x - 7592*x**2 + 2704*x**3 - 49*x**4 has two real roots at about 3.6 and 52 but only imaginary roots (and approx 0 at that) are being found. >>> solve(_,x) . .etc... . 3176523*256871224631296524288**(1/2))**(5/12)*(1086740688896/3176523 + 256871224631296524288**(1/2)/117649)**(1/6))] >>> [tmp.evalf() for tmp in _] [.0e-16 + .0e-16*I, .0e-16 + .0e-16*I, -.0e-18 - .0e-18*I, .0e-17 + .0e-17*I] Is the stiffness of this eqn giving the solver problems? /c -- You received this message because you are listed in the owner or CC fields of this issue, or because you starred this issue. You may adjust your issue notification preferences at: http://code.google.com/hosting/settings --~--~---------~--~----~------------~-------~--~----~ You received this message because you are subscribed to the Google Groups "sympy-issues" group. To post to this group, send email to sympy-issues@googlegroups.com To unsubscribe from this group, send email to sympy-issues+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/sympy-issues?hl=en -~----------~----~----~----~------~----~------~--~---
