FeynAmpDenominatorSplit

Description

FeynAmpDenominatorSplit[expr] splits all FeynAmpDenominator[a,b, ...] in expr into FeynAmpDenominator[a]*FeynAmpDenominator[b] ... . FeynAmpDenominatorSplit[expr, q1] splits all FeynAmpDenominator in expr into a product of two, one containing q1 and other momenta, the second without q1.

See also:  FeynAmpDenominatorCombine.

Examples

t = FAD[q1, q1 - p, q1 - q2, q2, q2 - p] // FCI

t // Head

FeynAmpDenominatorSplit[t]

% // FCE // StandardForm

FeynAmpDenominatorSplit[t, q1] // FCE // StandardForm

FeynAmpDenominatorCombine[%] // FCE // StandardForm

Clear[t]