  According to the observations, in our expansive and isotropic relativistic
Universe for the gravitational phenomena in a Newtonian approximation the
Newtonian non-modified relations are valid. The Friedmann general equations of
isotropic and homogeneous universe dynamics describe an infinite number of
models of expansive and isotropic relativistic universe in the Newtonian
approximation, but only in one of them the Newtonian non-modified relations are
valid. These facts give - till now not considered - possibility for unambiguous
deductive-reductive determination of the Friedmannian model, which describes
our observed Universe.
