Generalized evolutionary equations with imposed symmetries

The paper proposes an algorithm which could identify a general class of pdes describing dynamical systems with similar symmetries. The way that will be followed starts from a given group of symmetries, the determination of the invariants and, then, of the compatible equations of evolution. The algorithm will be exemplified by two classes of equations which describe the Fokker-Planck model and the "backward" Kolgomorov one.