On quantum general relativity

It is proved that the Rosenfeld's uncertainty inequalities can't derived from commutation rules of quantized General Relativity Theory (GRT) and so they are not a consequence of the quantization of the gravitational field, but they are an expression of the limitations that are imposed on the theory of quantum GRT. The commutation rules have however a physically well-defined meaning in cases, where the coordinates are physically determined. In special cases of general-relativistic gravitational fields, it is therefore possible to formulate commutation rules corresponding to Rosenfeld's uncertainty relations