On Jun 5, 2009, at 3:28 PM, Mike Hansen wrote:
> > This is not what the notation means. D[0](f) represented the the > derivative of f with respect to the first argument. D[0,0](f) > represents taking the derivative with respect to that argument twice. > Thus, you can have expressions like > > D[0,0,1](f)(x,y) > Sorry, it's slightly different than the Maple notation, which I often forget since I don't use it. D[0](f) seems strange when there is only one argument. I still hate the notation. It's also fairly non-standard notation. At least in Maple, it's mostly optional. Some functions require it, but there is a function to convert to and from that notation when necessary. It's bad enough that Sage uses row vectors when most linear algebra texts use columns (at least in North America). I'd prefer that Sage stick to traditional notation. Tim. --- Tim Lahey PhD Candidate, Systems Design Engineering University of Waterloo http://www.linkedin.com/in/timlahey --~--~---------~--~----~------------~-------~--~----~ 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 -~----------~----~----~----~------~----~------~--~---
