FourVector[p, mu]
is the -dimensional vector p
with Lorentz index mu
.
A vector with space-time Dimension is obtained by supplying the option Dimension -> D
.
The shortcut FourVector
is deprecated, please use FV
instead!
[p, \[Mu]] FourVector
[p - q, \[Mu]] FourVector
StandardForm[FourVector[p, \[Mu]]]
(*Pair[LorentzIndex[\[Mu]], Momentum[p]]*)
StandardForm[FourVector[p, \[Mu], Dimension -> D]]
(*Pair[LorentzIndex[\[Mu], D], Momentum[p, D]]*)
FourVector
is scheduled for removal in the future versions of FeynCalc. The safe alternative is to use FV
.
[p, \[Mu]] FV
[p, \[Mu]] FVD
[FV[p, \[Mu]]] === FourVector[p, \[Mu]] FCI
[FVD[p, \[Mu]]] === FourVector[p, \[Mu], Dimension -> D] FCI