If Sage calls Maxima, then it is a bug in Sage also.
Interestingly, Maxima gets the INdefinite integral correct.
On Sunday, April 15, 2018 at 10:31:36 PM UTC-7, Ralf Stephan wrote:
>
> Not Sage, it's Maxima:
> (%i2) integrate(sin(x)*exp(%i*x),x,-%pi,0);
>
FriCAS also would get it right, except that there is a bug in the
interface, see https://trac.sagemath.org/ticket/25174
If someone can give me a hint on how to send %i instead of I for the
imaginary unit to fricas, I'll fix it...
(1) -> integrate(sin(x)*exp(%i*x),x=-%pi..0)
%i %pi
Not Sage, it's Maxima:
(%i2) integrate(sin(x)*exp(%i*x),x,-%pi,0);
log(- 1)
(%o2) + %i %pi
2
On Sunday, April 15, 2018 at 6:44:23 PM UTC+2, Eric Gourgoulhon wrote:
>
> Hi,
>
> Indeed, this
Hi,
Indeed, this seems a bug in Sage.
Note that both SymPy and Giac return the correct answer:
sage: integrate(sin(x)*exp(I*x), x, -pi, 0)
3/2*I*pi
sage: integrate(sin(x)*exp(I*x), x, -pi, 0, algorithm='sympy')
1/2*I*pi
sage: integrate(sin(x)*exp(I*x), x, -pi, 0, algorithm='giac')
1/2*I*pi
