Mathematica for Graviton Scattering Amplitudes
Mathematica for the five-point single-minus is written entirely in terms of the
variables spa[i,j], spb[i,j] s[i,j]
Mathematica for the six-point single minus
is a mixture of the above together with the
lam[x,i] and barlam[x,i]. SubSp[ Mmppppp[1,2,3,4,5,6] ]
will produce a rational function of the lam[x,i],barlam[x,i]
with LeafCount=355,053 Evaluating the amplitude at the EGZ kinematic point used in the sixgluon amplitude returns
-474-3689I
Mathematica for the five-point MHV, scalar, is given in terms of spa[i,j], spb[i,j] s[i,j]
and spba[i,{j,k},l] (=spb[i,j]*spa[j,l]+spb[i,k]*spa[k,l] )