Maxima can't do this one either, at least not without some package.
(%i8) integrate(%e^(-x^2/2)/sqrt(2*%pi) * signum(x-1),x,minf,inf);
(%o8) ('integrate(%e^-(x^2/2)*signum(x-1),x,minf,inf))/
(sqrt(2)*sqrt(%pi))
On Aug 19, 2:05 pm, Omri <omri.ba...@gmail.com> wrote:
> Hi,
>
> I have an integral that is solved by Mathematica, but not by Sage:
>
> integrate( exp(-x^2/2)/sqrt(2*pi) * sign(x-1), x, -oo, oo )
>
> This is actually part of a 3D integral, that mathematica also solves, and
> sage has problems with due to the lack of multivariate integration:
>
> integrate sign(x+y)*sign(x+z) , where x,y and z are gaussian variables.
> The result is 1/3.
>
> Does anybody know why this happens, and how can I solve this in Sage?
> Thanks,
> Omri
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