%0 Journal Article %T An analytic proof of the Malgrange-Sibuya theorem on the convergence of formal solutions of an ODE %A R. R. Gontsov %A I. V. Goryuchkina %J Mathematics %D 2013 %I arXiv %X We propose an analytic proof of the Malgrange-Sibuya theorem concerning a sufficient condition of the convergence of a formal power series satisfying an ordinary differential equation. The proof is based on the majorant method and allows to estimate the radius of convergence of such a series. %U http://arxiv.org/abs/1311.6416v1