Thank you for reporting that problem. Indeed, diff(..., %pi) (or w.r.t.
any other constant) should give an error.
I have filed this as a
bug<https://sourceforge.net/tracker/?func=detail&aid=3487920&group_id=4933&atid=104933>;,
and assigned it to myself to fix.
-s
On Wed, Feb 15, 2012 at 12:25, michael <mxue at vroomlab.com> wrote:
>
> Thank you very much for your quick reply.
> I am still puzzled by the fact that
> ev(diff(sin(x),x), x=%pi) returns 0
> instead of an error. such as in the case of
> ev(diff(sin(x),x), x=%pi/4).
>
>
>
>
>
>
> _______________________________________________
> Maxima mailing list
> Maxima at math.utexas.edu
> http://www.math.utexas.edu/mailman/listinfo/maxima
>