Description

PowerSimplify[exp] simplifies (-x)^a to (-1)^a x^a and (y-x)^n to (-1)^n (x-y)^n; thus assuming that the exponent is an integer (even if it is symbolic). Furthermore (-1)^(a+n) and I^(a+n) are expanded and (I)^(2 m) -> (-1)^m and (-1)^(n_Integer?EvenQ m) -> 1 and (-1)^(n_Integer?OddQ m) -> (-1)^m and (-1)^(-n) -> (-1)^n and Exp[I m Pi] -> (-1)^m.

See also: DataType, OPEm.

Examples

The FeynCalc Book

PolarizationVector

PropagatorDenominator