Hello, method 'refine_root()' of class 'Poly' seems to unexpectedly raise an exception.
The following code produces the exception: x = Symbol( "x" ) p = Poly( x**4 - 6*x**3 + 11*x**2 - 6*x + 1 ) p.refine_root( 0, 1 ) # raises: sympy.polys.polyerrors.RefinementFailed: there should be exactly one root in (0/1, 1/1) interval p has a double root at sqrt(5)/2 + 3/2 and a double root at -sqrt(5)/2 + 3/2. Thus, if I understand correctly, the call of method 'refine_root()' should correctly yield a refinement interval for the double root at '-sqrt(5)/2 + 3/2'. However, it raises a 'RefinementFailed' exception. Is this a bug? Thank you in advance, Heiner -- You received this message because you are subscribed to the Google Groups "sympy" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. To post to this group, send email to [email protected]. Visit this group at http://groups.google.com/group/sympy. For more options, visit https://groups.google.com/groups/opt_out.
