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ExpandSToMPs

ExpandSToMPs[expr]
returns expr with invariants s[P, Q, ...] replaced by Minkowski products (MP).
  • The following options can be given:
"Massive"Truewhether to expand s invariants containing massive LVectors
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Options   (2)
With "Massive" set to True (default value) s invariants containing massive LVectors are also expanded:
With "Massive" set to False only s invariants containing massless Spinors are expanded: