I wonder if evaluate=None could be given to an expression like integrate(exp(x**n),x) -> Integral(exp(x**n), x, evaluate=None)
to act as a flag indicating that the user wants the integral evaluated but, in its present state, it can't be done. Then, when subs are made if the integral can be done the evaluated form is returned. Because of issue 2049 the assigning of evaluate=True to Integrals after making a subs was stopped. This led to a failure in the relativity demo file. But if the None were stored with the Integral obtained from integrate then subs would have permission to try the integral again. So either integrate(unknown integral) or Integral(func, evaluate=None) would return an expression which, when subs were made, would attempt a doit. -- You received this message because you are subscribed to the Google Groups "sympy" 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?hl=en.
