FeynCalc manual (development version)

MTD

MTD[mu, nu] is the metric tensor in D dimensions.

See also

Overview, FeynCalcExternal, FCE, FCI, MT, MTE.

Examples

MTD[\[Alpha], \[Beta]]

g^{\alpha \beta }

Contract[MTD[\[Alpha], \[Beta]] MTD[\[Alpha], \[Beta]]]

D

MTD[\[Alpha], \[Beta]] // StandardForm

(*MTD[\[Alpha], \[Beta]]*)
FCI[MTD[\[Alpha], \[Beta]]] // StandardForm

(*Pair[LorentzIndex[\[Alpha], D], LorentzIndex[\[Beta], D]]*)
FCE[FCI[MTD[\[Mu], \[Nu]]]] // StandardForm

(*MTD[\[Mu], \[Nu]]*)