This is the reference manual for Toolkit for High Energy Physics Event Generation - ThePEG.
ThePEG is a general toolkit for implementing physics models of event generation in high energy particle collisions. It defines a general structure of event generation in terms of abstract base classes for eg. hard partonic matrix elements, parton showers and the decay of unstable particles. Different models are then implemented by creating classes which inherits from these base classes and implements sets of pre-defined virtual functions.