FeynCalc manual (development version)

LorentzIndex

LorentzIndex[mu] denotes a 44-dimensional Lorentz index.

For other than 44 dimensions: LorentzIndex[mu, D] or LorentzIndex[mu] etc.

LorentzIndex[mu, 4] simplifies to LorentzIndex[mu].

See also

Overview, ChangeDimension, Momentum.

Examples

This denotes a 44-dimensional Lorentz index.

LorentzIndex[\[Alpha]]

α\alpha

An optional second argument can be given for a dimension different from 44.

LorentzIndex[\[Alpha], n]

α\alpha