FEYN CALC SYMBOL

DiracGammaExpand


expands all DiracGamma[Momentum[a+b+..]] in exp into (DiracGamma[Momentum[a]] + DiracGamma[Momentum[b]] + ...).

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Basic Examples  (1)Basic Examples  (1)

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Momentum is the head of p-q, i.e., it is treated as one four-momentum.
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With DiracGammaExpand the Momentum[p-q] gets expanded.
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The inverse operation is DiracGammaCombine.
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In order to do non-commutative expansion use DiracSimplify.
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