FeynCalc manual (development version)

GammaExpand

GammaExpand[exp] rewrites Gamma[n + m] in exp (where n has Head Integer).

See also

Overview, GammaEpsilon.

Examples

GammaExpand[Gamma[2 + Epsilon]]

(\varepsilon +1) \Gamma (\varepsilon +1)

GammaExpand[Gamma[-3 + Epsilon]]

\frac{\Gamma (\varepsilon +1)}{(\varepsilon -3) (\varepsilon -2) (\varepsilon -1) \varepsilon }

GammaExpand[Gamma[1 + Epsilon]]

\Gamma (\varepsilon +1)