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Lemmes de Hensel pour les opérateurs différentiels. Application à la reduction formelle des équations différentielles. (French) Zbl 0466.12014

##### MSC:
 12H20 Abstract differential equations 12H25 $$p$$-adic differential equations 34A30 Linear ordinary differential equations and systems 34A25 Analytical theory of ordinary differential equations: series, transformations, transforms, operational calculus, etc. 34G20 Nonlinear differential equations in abstract spaces 47E05 General theory of ordinary differential operators