On Mon, Aug 25, 2008 at 9:34 PM, Tim Lahey <[EMAIL PROTECTED]> wrote: > > On Aug 26, 2008, at 12:23 AM, William Stein wrote: >> >> I only meant it as a definition to help clarify the discussion, not >> as an algorithm. Many thanks for your additional clarification. >> >> William >> > > Oh, I misunderstood. If Sage can't take the derivative with respect > to a function, I wouldn't be surprised since it isn't a common > feature of the various CAS packages I've tried. > > The Maple code I posted at the start of the thread runs in well > less than a second while the built-in Maple code takes about 10s > for the same problem because of a poor decision the implementers > made. Their code always tries to integrate as the last step even when > the DEs can't be integrated so it has to wait for the integration to > fail. > > I think the new pynac code might make implementing some of the things > I do easier. I'll see. >
Well I really hope that you implement a bunch of stuff for inclusion in Sage! So far we have very very very few developers working on symbolic differential equations stuff in Sage. (I.e., none, as far as I know.) William --~--~---------~--~----~------------~-------~--~----~ To post to this group, send email to sage-devel@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-devel URLs: http://www.sagemath.org -~----------~----~----~----~------~----~------~--~---
