Comment #29 on issue 1620 by [email protected]: Allow derivatives of unknown functions evaluated at a point
http://code.google.com/p/sympy/issues/detail?id=1620
BTW, Lambda also acts this way.
That's interesting, e.g.: In [2]: Lambda(x, x) Out[2]: Lambda(_x, _x) In [3]: Lambda(x, x) + Lambda(x, x) Out[3]: 2â‹…Lambda(_x, _x) In [6]: Lambda(x, f(x)) + Lambda(x, f(x)) Out[6]: Lambda(_x, f(_x)) + Lambda(_x, f(_x)) In [7]: Lambda(x, 2*x) + Lambda(x, 2*x) Out[7]: Lambda(_x, 2*_x) + Lambda(_x, 2*_x) [3] is probably just a coincidence because "_2 is S.IdentityFunction". -- You received this message because you are subscribed to the Google Groups "sympy-issues" 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-issues?hl=en.
