On Fri, Aug 29, 2008 at 3:07 AM, Burcin Erocal <[EMAIL PROTECTED]> wrote: > > On Thu, 28 Aug 2008 15:28:03 -0400 > Tim Lahey <[EMAIL PROTECTED]> wrote: > >> Hi, >> >> Maple has a really useful feature of inert integrals >> and derivatives. Basically, the integrals and derivatives >> show up in the equations, but aren't evaluated until >> a command to evaluate them is explicitly given. So, >> you can delay the evaluation until after you've processed >> the expression to the point where it can be evaluated. >> >> This feature comes in very handy during complicated >> derivations because you can see which terms are integrals >> or derivatives and manipulate them along side >> non-integrals/derivatives. >> >> Is there a way to do this in Sage? > > This is not supported in Sage at the moment, but it is definitely > planned. It should be fairly simple to implement this using the new > symbolic function interface from ginac, which allows one to specify > custom simplify/automatic evaluation functions. > > I am not familiar with the maple syntax. Can you give some examples of > how to use these features so I can play with them without having to dig > through documentation?
I agree this would be a very useful feature. Basically, something like (1) sage: integral(x,x,0,1) 1/2 sage: Integral(x,x,0,1) \int_0^1 x\, dx (not the upper case I), or maybe (2) sage: A = Integral(x,x,0,1) sage. latex(A) \int_0^1 x\, dx sage: A Integral(x,x,0,1) > > > Thanks. > > Burcin > > > > --~--~---------~--~----~------------~-------~--~----~ To post to this group, send email to sage-support@googlegroups.com To unsubscribe from this group, send email to [EMAIL PROTECTED] For more options, visit this group at http://groups.google.com/group/sage-support URLs: http://www.sagemath.org -~----------~----~----~----~------~----~------~--~---
