FeynCalc manual (development version)

FCSetMetricSignature

FCSetMetricSignature sets the signature of the Minkowski metric used when working with Cartesian objects, like CartesianPair, CartesianIndex, CartesianMomentum etc.

The default choice is (1,-1,-1,-1) which corresponds to FCSetMetricSignature[{1,-1}].

See also

Overview, FCGetMetricSignature.

Examples

FCSetMetricSignature[{-1, 1}] 
 
SPD[p, q] // LorentzToCartesian

p\cdot q-p^0 q^0

FCSetMetricSignature[{1, -1}] 
 
SPD[p, q] // LorentzToCartesian

p^0 q^0-p\cdot q