FeynGrav 3.0

The package provides an extension for FeynCalc to operate with Feynman rules for various gravity models. This version implements interaction rules for: *) General Relativity *) Horndeski gravity *) Quadratic gravity *) Massive and massless scalars *) Massive and massless vectors *) Massive and massless Dirac spinors *) SU(N) Yang-Mills model *) Single field axion-like coupling It also implements *) Propagator for massive gravity *) Gauge projectors and Nieuwenhuizen operators