| DeclareSpinorRandomMomentum[a, maxP] declares random four-vector with three-vector components between -maxP and +maxP , and with positive energy, to be the four-vector associated with a spinor. |
| DeclareSpinorRandomMomentum[a] uses 1 as default value for maxP . |
| "Complex" | False | whether to allow complex components in four-momentum |