Hyperbolic Regularization of the Sobolev System

The article deals with a hyperbolic system with small parameter which turns into a Sobolev system as the parameter vanishes. It is proven that some components of a solution to the Cauchy problem for this hyperbolic system tend to the corresponding components of a solution to the Cauchy problem for the Sobolev system uniformly on the set $[0,T]\times\mathbb R_3$. The derivatives with respect to the space variables of the remaining component converge uniformly on every set $[t_0,T]\times K$, where $0<t_0<T$ and $K$ is a compact set.