This is outside my area of expertise, so I don't have any immediate pointers, but hopefully the new symbolics will have abilities to do something like this.
- Robert On Feb 26, 2009, at 1:31 PM, Maurizio wrote: > Well, that was exactly what I was going to do, but I have no idea how > to implement something like a (symbolic) k-th order derivative, such > that I could then do the limit. Moreover, the derivative seems to be > something close to the core of something like a CAS, so I don't think > I could be able to help for that. > > That's why I was asking for help at least for this derivative part > (and maybe also the limit is not so easy as well). > > I will really try to be helpful, but I still need some support > > Regards > > Maurizio > > On 26 Feb, 21:13, Robert Bradshaw <rober...@math.washington.edu> > wrote: >> On Feb 26, 2009, at 2:49 AM, Maurizio wrote: >> >> >> >>> Hi all, >> >>> what do you think about the inverse_laplace() now present in SAGE? >> >>> I am not very satisfied, I am not able to derive the results for >>> even >>> simple functions. >> >> It is a simple wrapper around the maxima inverse laplace function. >> >>> What I'd like is to get numerical results, so I thought there should >>> have been a way to obtain them, but I didn't find. Can you help me? >> >>> In addition, I found on the net the Post's inversion Laplace formula >>> (http://en.wikipedia.org/wiki/Post%27s_inversion_formula). It has >>> been successfully implemented in Maple, here: >>> http://www.mapleprimes.com/blog/alec/numerical-inverse-laplace- >>> transform-0 >> >>> I wanted to try this out in SAGE, but the problem seems to be the >>> necessity of doing the k-th derivative of the function, where k is a >>> symbolic variable (that has to go to +Infinity then). I couldn't do >>> that, do you know if that's possible? >> >> Not that I am aware of at the moment, but if it would be great if >> someone (for instance you) could implement it and send us a patch. >> >> - Robert > > --~--~---------~--~----~------------~-------~--~----~ To post to this group, send email to sage-support@googlegroups.com To unsubscribe from this group, send email to sage-support-unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/sage-support URLs: http://www.sagemath.org -~----------~----~----~----~------~----~------~--~---
