Aha, I forgot ....
Sorry for this stupid mistake.
Robert
**************************************************************
Mgr. Robert Marik, Ph.D. (Robert Ma\v r\'\i k)
Dpt. of Mathematics, Mendel University Brno (www.mendelu.cz)
Zemedelska 3
613 00 Brno, CZECH REPUBLIC
tel:+420 5 4513 4030
**************************************************************
On Mon, 3 Mar 2008, Stavros Macrakis wrote:
> On Mon, Mar 3, 2008 at 9:28 AM, Robert Marik <marik at mendelu.cz> wrote:
> > (%i7) float(log(-1)^2);
> > (%o7) - 9.869604401089358
> >
> > This seems to be incorrect, isn't it?
>
> No, it is correct. log(-1) = %i*%pi. (%i*%pi)^2 = - %pi^2 float=> -9.86.
>
> -s
>