PageHeader : Funkcialaj Ekvacioj, 11 (1968), 235-246
Title : Perturbation of Linear Ordinary Differential
Title : Equations at Irregular Singular Points
AuthorInfo : By Yasutaka SIBUYA*
AuthorInfo : (University of Minnesota)
section : I. Introduction
subsection : 0. An example.
subsection : 1. Main theorem.
subsection : 2. Lemmas on nonlinear systems.
section : II. Proof of Lemma 4
subsection : 3. A formal solution.
subsection : 4. Existence of an actual solution.
section : III. Proof of Lemma 2
subsection : 5. A linear system.
subsection : 6. A block-diagonalization theorem.
section : References