On Tue, Aug 18, 2009 at 11:17 PM, Robert Dodier<[email protected]> wrote: > > William Stein wrote: > >> Unless you can give a explanation of what you want integrating wrt x^2 >> to mean, I think we should also raise an error in Sage. > > That would be unfortunate. Faced with some unrecognized construct, > the mathematical thing to do is to just leave it be. Whether it's > meaningful is for the user to decide. You don't know what > integrate(f(x), g(x)) means. Why not let someone else come > up with an interpretation? Why must you close that door?
Is there any other interpretation besides: int f(x) d g(x) = int f(x) * dg/dx dx ? Example used in physics: int P(cos(x)) sin(x) dx = int P(cos(x)) dcos(x) where P is a Legendre polynomial. Ondrej --~--~---------~--~----~------------~-------~--~----~ To post to this group, send an email to [email protected] To unsubscribe from this group, send an email to [email protected] For more options, visit this group at http://groups.google.com/group/sage-devel URLs: http://www.sagemath.org -~----------~----~----~----~------~----~------~--~---
