FEYN CALC SYMBOL

LorentzIndex


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].

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Basic Examples  (1)Basic Examples  (1)

This denotes a four-dimensional Lorentz index.
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An optional second argument can be given for a dimension different from 4.
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Setting $LorentzIndices=True displays the dimension (if different from 4) as a subindex.
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