Mathematica Seven gluon scattering amplitude
There are some files to download. These contain the general functions
from which box, triangle and bubble coefficients are determined
Boxfunctions.math ;
Trianglefunctions.math ;
Bubblefunctions.math
The code expresses the coefficients in terms of < ab> , [ab] and s_{ab}.
These arrays are spa[a,b] spb[a,b] and s[a,b] . Combinations such as
spba[ a,{i,j}, b] =spb[a,i]*spa[i,b]+spb[a,j]*spa[j,b]
etc etc are commonly used.
In no sense is any of this code claimed to be optimal !!!!
The code run on Mathematica 6.