FeynCalc manual (development version)

SUNFIndex

SUNFIndex[a] is an SU(N) index in the fundamental representation. If the argument is an integer, SUNFIndex[a] turns into ExplicitSUNFIndex[a].

See also

Overview, SUNIndex.

Examples

SUNFIndex[i]

i

SUNFIndex[i] // StandardForm

(*SUNFIndex[i]*)
SUNFIndex[2]

2

SUNFIndex[2] // StandardForm

(*ExplicitSUNFIndex[2]*)
SUNFDelta[i, j] // FCI // StandardForm

(*SUNFDelta[SUNFIndex[i], SUNFIndex[j]]*)