FeynCalc manual (development version)

MT

MT[mu, nu] is the metric tensor in 4 dimensions.

See also

Overview, FeynCalcExternal, FCE, FCI, MTD, MTE.

Examples

MT[\[Alpha], \[Beta]]

\bar{g}^{\alpha \beta }

Contract[MT[\[Alpha], \[Beta]] MT[\[Alpha], \[Beta]]]

4

MT[a, b] // StandardForm

(*MT[a, b]*)
FCI[MT[a, b]] // StandardForm

(*Pair[LorentzIndex[a], LorentzIndex[b]]*)
FCE[FCI[MT[a, b]]] // StandardForm

(*MT[a, b]*)