FCGetDummyIndices[exp, {head1, head2, ...}]
returns the list of dummy indices from heads head1
, head2
, …
As always in FeynCalc, Einstein summation convention is implicitly assumed.
Overview, FCRenameDummyIndices, Contract, DummyIndexFreeQ, FCGetFreeIndices, FreeIndexFreeQ.
[FV[p, \[Mu]] FV[q, \[Nu]]]
FCI
[%, {LorentzIndex}] FCGetDummyIndices
[FV[p, \[Mu]] FV[q, \[Mu]]]
FCI
[%, {LorentzIndex}] FCGetDummyIndices
[SUNT[a, b]]
FCI
[%, {SUNIndex}] FCGetDummyIndices
[SUNT[a, a]]
FCI
[%, {SUNIndex}]
FCGetDummyIndices