On Jun 20, 6:50 pm, Matthias Meulien <oron...@gmail.com> wrote: > Hi, > > I can't figure out why the following commands ends with a TypeError > exception. > > sage: basering = PolynomialRing(SR, 'x') > sage: polynomial = basering.lagrange_polynomial([(0,0), (1,pi), (2, pi/ > 2)]) > sage: > polynomial.base_ring() > Symbolic Ring > sage: > type(polynomial) > <class > 'sage.rings.polynomial.polynomial_element_generic.Polynomial_generic_dense_field'> > sage: > polynomial.roots(x) ~ snip ~ > TypeError: base_ring must be a ring > > Thanks for reading.
sage: polynomial.roots? gives lots of information including the calling information: polynomial.roots(self, ring=None, multiplicities=True, algorithm =None) It appears that a ring is needed. If I do sage: polynomial.roots(RR) [(0.000000000000000, 1), (2.33333333333333, 1)] There may be more information in the doc string that is useful for you. HTH, Adam -- 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
