FeynCalc manual (development version)

FeynAmpDenominatorCombine

FeynAmpDenominatorCombine[expr] expands expr with respect to FeynAmpDenominator and combines products of FeynAmpDenominator in expr into one FeynAmpDenominator.

See also

Overview, FeynAmpDenominatorSplit.

Examples

FAD[q] FAD[q - p] 
 
ex = FeynAmpDenominatorCombine[%]

\frac{1}{q^2 (q-p)^2}

\frac{1}{q^2.(q-p)^2}

ex // FCE // StandardForm

(*FAD[q, -p + q]*)

ex2 = FeynAmpDenominatorSplit[ex]

\frac{1}{q^2 (q-p)^2}

ex2 // FCE // StandardForm

(*FAD[q] FAD[-p + q]*)