Equivalence groupes of eikonal equation and classes of equivalent equations

In the papre the resuts describing the foliation of the family of eikonal equations onto classes of equivalence is presented. The technique of the group analysis is used: symmetry groups, equivalence groupes, for all family and for subfamilies, groups induced by the equivalence group on the manifolds of parameters, describing the classifying equations. To the extension of the group idees the notion of the cone of tangent equivalences is introduced, this notion is used for the analysis of the connection between the general and the partial equivalence groups.