FEYN CALC SYMBOL

FeynAmpDenominatorSimplify


tries to simplify each PropagatorDenominator in a canonical way. FeynAmpDenominatorSimplify[exp, q1] simplifies all FeynAmpDenominator's in exp in a canonical way, including some translation of momenta. FeynAmpDenominatorSimplify[exp, q1, q2] additionally removes integrals with no mass scale. FDS can be used as an alias.

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Basic Examples  (1)Basic Examples  (1)

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The cornerstone of dimensional regularization is that intd^nk f(k)/k^(2m)= 0 .
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This brings 1/((k-p_1)^2 (k-p_2)^2) into a standard form.
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