Formal Paths, Iterated Integrals and the Center Problem for Ordinary Differential Equations
نویسنده
چکیده
We continue the study of the center problem for the ordinary differential equation v′ = ∑∞ i=1 ai(x)v i+1 started in [Br1]-[Br5]. In this paper we present the highlights of the algebraic theory of centers.
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