normal()

[Do Hoang Son]

Hi Christian ,

You are right Christian, I forgot to tell you to take rho to zero.  
After assigning rho:=0 you will get the same result as Dr. Kreimer 
mentioned.
But you got it by normal() or symplify()? 
I used normal() and get about 3 pages in length of output while Maple
gives us as short as below (befor assign rho:=0).
It'll be good if normal() can do that.

Have nice weekend,
Son.
--------
On Thu, 21 Oct 1999, Dirk Kreimer wrote:

> Hi there,
> 
> upon realizing that Christian's denominator below
> is (q1-q2)^2*q2^2, and that q10+q21=(q1^2+q1\cdot q2)/q10,
> it is actually easy to verify that his result
> and Do Hoang Son's agree, upon further setting rho=0 in the numerator
> in Christian's result.
> 
> So normal should see that in this limit, after a bit massage?
> 
> Herzliche Gruesse aus Harvard,
> 
> Dirk
> 
> 
> 
> 
> Christian Bauer wrote:
> 
> > Hi!
> >
> > On Wed, 20 Oct 1999, Do Hoang Son wrote:
> > > coeff(series(OneLoop3Pt(3,0,0,q10,q20,q21,m1,m2,m3),eps,3),eps,-1); !!!
> > >
> > > This result if be simplified by simplify() of Maple gives
> > > -1/4*I*Pi(q10+q20) as expected
> >
> > Hm... I get
> >
> >                3    2          3    2          2    3          2    2
> > - 1/12 (3 I q10  q20  - 3 I q10  q21  - 3 I q10  q20  + 3 I q10  q21  q20
> >
> >               4                2              4          5          2   3
> >  - 3 I q10 q20  + 2 q10 rho q21  + 3 I q10 q21  + 3 I q20  - 6 I q21 q20
> >
> >                   2              4    2   /
> >    - 4 q20 rho q21  + 3 I q20 q21 ) Pi   /  (
> >                                         /
> >
> >                      2      2      2       2      2
> >     (-2 q20 q10 - q21  + q10  + q20 ) (-q21  + q20 ))
> >
> > !?
> >
> > Bye,
> > Christian
> >
> > --
> >   / Coding on PowerPC and proud of it
> > \/ http://www.uni-mainz.de/~bauec002/
>