On Mon, Dec 15, 2008 at 01:32:27AM +0100, Ondrej Certik wrote: > > On Sun, Dec 14, 2008 at 11:44 PM, Friedrich Hagedorn <[email protected]> > wrote: > > > > On Sun, Dec 14, 2008 at 10:20:13PM +0100, Ondrej Certik wrote: > > [...] > >> Ideally the improvement should be that Functions should behave exactly > >> like Symbols (with respect to differentiation and maybe other things), > >> but they will also carry the dependencies on other variables -- so > >> that sympy can also differentiate with respect to those variables > >> correctly. > > > > It sounds nice, but what are the free variables in > > > > term = x*y**2 + f(u, v) > > > > Is this term a function of > > > > F1(x,y,f) = term > > > > or > > > > F2(x,y,u,v) = term > > > > or > > > > F3(x,y,f,u,v) = term > > > > ? > > I think it doesn't matter, does it?
Hm, it was just a question. > What is important is to know how > to differentiate, e.g. with respect to "u", or "f", or "x". Which we > know. Or is here something that I am missing? Yes, I think your are right. Friedrich --~--~---------~--~----~------------~-------~--~----~ You received this message because you are subscribed to the Google Groups "sympy" group. To post to this group, send email to [email protected] To unsubscribe from this group, send email to [email protected] For more options, visit this group at http://groups.google.com/group/sympy?hl=en -~----------~----~----~----~------~----~------~--~---
