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Consider the Ordinary Differential Equations: (1) y = A(t)y + f_'(t , y) (2) x = A(t)x + f₂(t , x) where x, y, f_' and f₂(t,x) belong to X (Rⁿ or Cⁿ), and A(t) is an n x n matrix with t in J= [0,∞). Our objective in this work is given as follows: First, we introduce a generalization of the concept of asymptotic equivalence dealing with Banach spaces stronger than L(J,X). In addition, we give information about the number of parameters involved in the problem. Secondly, under suitable conditions, we stablish, in a natural way, homeomorphisms between a family F of D-asymptotic. solution of (1), its section F(T) and a subspace of the phase space. The above diagram, suggested by the mentioned homeomorphisms, is essentialy the one given by Taboas [18]. The main tool used here are the theorem of Corduneanu [6 - a, Th. 1] and results of Massera-Schaffer Theory [12-a,c]. Several applications of the theory under consideration are done here.