Status: New Owner: [email protected] Labels: Type-Defect Priority-Medium Integration
New issue 1301 by [email protected]: Exception while integrating x**n * log(x) http://code.google.com/p/sympy/issues/detail?id=1301 With the symbols x and n defined: >>> integrate((x**n)*ln(x),x) Traceback (most recent call last): File "<stdin>", line 1, in <module> File "sympy/utilities/decorator.py", line 55, in threaded_decorator return func(expr, *args, **kwargs) File "sympy/integrals/integrals.py", line 381, in integrate return integral.doit() File "sympy/integrals/integrals.py", line 132, in doit antideriv = self._eval_integral(function, x) File "sympy/integrals/integrals.py", line 306, in _eval_integral h = heurisch(g, x, hints=[]) File "sympy/integrals/risch.py", line 216, in heurisch denom = reduce(lambda p, q: lcm(p, q, V), denoms) File "sympy/integrals/risch.py", line 216, in <lambda> denom = reduce(lambda p, q: lcm(p, q, V), denoms) File "<string>", line 3, in lcm File "sympy/polys/wrappers.py", line 39, in _map_basic result = f(*_conv_args(n, args), **kwargs) File "sympy/polys/algorithms.py", line 354, in poly_lcm f, g = f.unify_with(g) File "sympy/polys/polynomial.py", line 1512, in unify_with other = cls(other, *symbols, **flags) File "sympy/polys/polynomial.py", line 400, in __new__ terms = Poly._decompose(poly, *symbols) File "sympy/polys/polynomial.py", line 543, in _decompose raise PolynomialError("Can't decompose %s" % factor) sympy.polys.polynomial.PolynomialError: Can't decompose _x0**(2 - n) -- 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 [email protected] To unsubscribe from this group, send email to [email protected] For more options, visit this group at http://groups.google.com/group/sympy-issues?hl=en -~----------~----~----~----~------~----~------~--~---
