On May 14, 3:57 am, Laurent <moky.m...@gmail.com> wrote:
> Hello
Hi Laurent,
> ++++++++++++++++++++++++++++++++
>
> x,y=var('x,y')
> s = x*y2 + x*(-y2 - x2 + 1) + x3 - x
> print simplify(s)
>
> Answer :
>
> 2 2 2 3
> x y + x (- y - x + 1) + x - x
>
> +++++++++++++++++++++++++++++
>
> I'm quite disappointed that Sage do not notice that s=0. Do I miss
> something ?
> Btw, the function simplify_full does not exist ... so I suppose that I
> *do* miss something.
Yes, it does exist for me :)
----------------------------------------------------------------------
| Sage Version 3.4.2, Release Date: 2009-05-04 |
| Type notebook() for the GUI, and license() for information. |
----------------------------------------------------------------------
sage: x,y=var('x,y')
sage: s = x*y^2 + x*(-y^2 - x^2 + 1) + x^3 - x; s
x*y^2 + x*(-y^2 - x^2 + 1) + x^3 - x
sage: s.simplify()
x*y^2 + x*(-y^2 - x^2 + 1) + x^3 - x
sage: s.simplify_full()
0
> My version is extracted from the tar.gz downloaded from the website :
>
> | Sage Version 3.4.1, Release Date: 2009-04-21 |
> | Type notebook() for the GUI, and license() for information. |
> ----------------------------------------------------------------------
>
> Should I install some additional proposed packages
> ?http://www.sagemath.org/download-packages.html
>
> Thanks
> Laurent
Cheers,
Michael
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