Let I1 be a set of points such that their trajectories under a diffeomorphism f1 are entirely close enough to a hyperbolic set F1 of this diffeomorphism. Then it is proved that the structure of I1 and restriction f1|I 1 ("motion in I1") are essentially defined (up to an equivariant homeomorphism) by "internal dynamics" in F1, i.e., by the restriction f1|F 1 . (In more detail: the equivariant homeomorphism g1 of the set F1 on the hyperbolic set F2 of the second diffeomorphism f2 (probably, acting on another manifold M2) is extendable to an equivariant homeomorphic embedding I1 → M2. The image of the imbedding contains all the trajectories f2 close enough to F2.) 1. Before formulating the results, let us turn our attention to notation and terminology that we use further.Let A be a subset of the set M. Let us denote by j A an identical embedding of A in M, i.e., if x ∈ A, then j A x is the same element x, but it is considered as an element of M. (This notation will be used in cases where we talk mostly about the same M. Therefore, we do not consider M in the notation.)As before, let A ⊂ M and let a bijective transformation f : M → M act on the set M. Let us denote I(A) := ∞ −∞