Comment #26 on issue 1620 by ronan.l...@gmail.com: Allow derivatives of unknown functions evaluated at a point
http://code.google.com/p/sympy/issues/detail?id=1620
I see. It feels wrong not to use Lambda somehow, but we can deal with that later, once we get Eval to work (we might actually need something similar to Lambda but with different behaviour). So please send your pull request.
-- You received this message because you are subscribed to the Google Groups "sympy-issues" group. To post to this group, send email to sympy-issues@googlegroups.com. To unsubscribe from this group, send email to sympy-issues+unsubscr...@googlegroups.com. For more options, visit this group at http://groups.google.com/group/sympy-issues?hl=en.
