PageHeader : Funkcialaj Ekvacioj, 31 (1988) 397-409 Title : Analytical Reduction of Differential Systems AuthorInfo : By AuthorInfo : B. KLARES AuthorInfo : (Universite de Metz, France) section : 1. Introduction subsection : 1. Origin of the problem subsection : 2. Notations subsection : 3. Main theorem. Consider (1) $ df=f\cdot\Omega$ where f takes its values in section : 2. Examples of $(\mathcal{E}, p)$ section : 3. Proof of the main theorem subsection : 1. Two well known results (see [3]) section : 2. Proof of the theorem section : 3. Convergent point of view section : a) Notations section : b) Hypothesis (H) section : 4. Application 1 section : 5. Application 2 section : References