Proof of conformal invariance in the critical regime for models of Gross–Neveu type

It is shown that for all multiplicatively renormalizable fermionic models without derivativs in the interaction, in particular, for the Gross–Neveu model, conformal invariance of the Green's functions of the fields in the critical regime (massless model at fixed renormalization-group point) automatically follows from the scale invariance for arbitrary space dimension.