FEYN CALC SYMBOL

FCApart


is an internal function that partial fractions a loop integral (that depends on q1,q2,...) into integrals that contain only linearly independent propagators. The algorithm is largely based on the work and code of F. Feng (arXiv:1204.2314). FCApart is meant to be applied to single loop integrals only. If you need to perform partial fractioning on an expression that contains multiple loop integrals, use ApartFF

DetailsDetails

  • There is actually no reason, why one would want to apply FCApart instead of ApartFF, except for cases, where FCApart is called from a different package that interacts with FeynCalc.