LorentzIndex

Description

LorentzIndex[mu] denotes a four dimensional Lorentz index. For other than four dimensions: LorentzIndex[mu, D] or LorentzIndex[mu], etc. LorentzIndex[mu, 4] simplifies to LorentzIndex[mu].

See also:  ChangeDimension, Momentum.

Examples

This denotes a four-dimensional Lorentz index.

LorentzIndex[α]

An optional second argument can be given for a dimension different from 4.

LorentzIndex[α, n]

LorentzIndex[ComplexIndex[α]]

ComplexConjugate[LorentzIndex[μ]]

ComplexConjugate[LorentzIndex[ComplexIndex[β]]]

Setting $LorentzIndices=True displays the dimension (if different from 4) as a subindex.

$LorentzIndices = True;

{LorentzIndex[α, D], LorentzIndex[ν, n], 
      LorentzIndex[β, 4]}

$LorentzIndices  =  False;