kcrisman wrote: > Dear Devel list, > > Before reading this, read the discussions at > http://groups.google.com/group/sage-devel/browse_thread/thread/8ec32e4d895da60c > and tracs # 1221 and # 2787. > > Since nothing has been done on this in over a year, and because I feel > fairly strongly that it is *very* important (to keep "insane ease of > use", in wdj's words) to keep things like > sage: integrate(sin(x),x,0,pi) > viable, I messed around with a toy implementation of some alternate > syntax that would preserve backward compatibility but allow for the > Mathematica-style syntax and multiple integration. > > I now have a working (still toy) implementation that keeps all current > syntax, but adds the following possibilities giving correct answers: > > sage: integrate(sin(x),[x],[var('y')]) # double integral, x first > sage: integrate(sin(x),[x,0,pi],[y]) # one definite, one indefinite > sage: integrate(sin(x),(x,),(x,)) # double integral, using tuples > instead of lists if you like parentheses > sage: integrate(sin(x),(x,),(var('y'),),(var('z'),)) # or more > integrals > > One would not (yet) be able to do something like > sage: integrate(sin(x),[0,pi]) > though I suppose it would be easy to implement; this seems a little > weird to me personally, though, esp. if > sage: integrate(sin(x),0,pi) > is already available. > > Because the integration code is spread in a few places, I am sure it > will take some work to make this work properly, but I am familiar > enough with it from previous work that this proof of concept has > convinced me. (Thanks, Python, for making such things so easy!) It > is really just a matter of asking the right arguments to be passed at > some point, since Maxima and the interface to it take care of the > rest. > > So I am wondering if there is any feedback from esp. William, Ondrej, > Jason, and whomever else posted or discussed this on trac. Certainly > having "native" multiple integrals seems like a no-brainer to try to > have, and enabling easy transfer from Mma is definitely useful. But > I'd also like to ensure that > sage: integrate(sin(x),x,0,pi) > and friends live happily ever after, or at least until I stop > teaching, and I am quite happy to do all the work to make that happen > while addressing the valid points these tickets make.
I have no opinion on the integrate(sin(x),x,0,pi), since I don't (like to) use that syntax and don't plan on teaching it to students. However, a strong +1 to getting MMA-like syntax integrate(sin(x), (x, 0, pi)). I really miss that. Thanks, Jason --~--~---------~--~----~------------~-------~--~----~ To post to this group, send email to sage-devel@googlegroups.com To unsubscribe from this group, send email to sage-devel-unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/sage-devel URLs: http://www.sagemath.org -~----------~----~----~----~------~----~------~--~---
