Re: [Maxima-discuss] [Maxima-commits] [git] Maxima CAS branch, master, updated. branch-5_36-base-102-g2b1366c

[Jaime V. <vi...@fe...>]

On 18-05-2015 21:23, Kris Katterjohn wrote:
> (%i3) diff(gamma_incomplete(b,x), b);
> (%o3) (-(gamma(b)-gamma_incomplete(b,x))*log(x))
While we are talking about the derivative of gamma_incomplete,
I'd like to bring your attention to

(%i2) diff (gamma_incomplete (1/3, -x^3), x);
(%o2) 3*%e^x^3

Which gives rise to a wrong anti-derivative for  %e^x^3
(see bug #2941, https://sourceforge.net/p/maxima/bugs/2941/)

The correct result for diff (gamma_incomplete (1/3, -x^3), x)
should be 3*x^2*%e^x^3/(-x^3)^(2/3)

but Maxima simplifies x^2/(-x^3)^(2/3) as equal to 1

Regards,
Jaime