SPLPD[p,q,n,nb]
denotes the positive component in the lightcone decomposition of the scalar product along the vectors n
and nb
in -dimensions. It corresponds to .
If one omits n
and nb
, the program will use default vectors specified via $FCDefaultLightconeVectorN
and $FCDefaultLightconeVectorNB
.
Overview, Pair, FVLND, FVLPD, FVLRD, SPLND, SPLRD, MTLPD, MTLND, MTLRD.
[p, q, n, nb] SPLPD
StandardForm[SPLPD[p, q, n, nb] // FCI]
Notice that the properties of n
and nb
vectors have to be set by hand before doing the actual computation
[p1 + p2 + n, q, n, nb] // ExpandScalarProduct SPLPD
[]
FCClearScalarProducts[n] = 0;
SPD[nb] = 0;
SPD[n, nb] = 2; SPD
[p1 + p2 + n, q, n, nb] // ExpandScalarProduct SPLPD
[] FCClearScalarProducts