PageHeader : Funkcialaj Ekvacioj, 10 (1967), 107-122 Title : On the Analytic Validity of Formal Simplifications Title : of Linear Diff.erential Equations, II*) AuthorInfo : By Wolfgang WASOW AuthorInfo : (University of Wisconsin) section : CHAPTER 1 IRREGULAR SINGULAR POINTS OF DIFFERENTIAL EQUATIONS WITH A PARAMETER subsection : 1. Introduction subsection : 2. Formal Diagonalization. subsection : 3. Solution of the Diagonalized Equation. subsection : 4. An Integral Equation for the Solution of the Differential Equation (1. 4). subsection : 5. Solution of the Integral Equation (4. 9). section : CHAPTER 2 PROOF OF THE MAIN THEOREM OF PART I subsection : 6. Restatement of the Problem. subsection : 7. Solution of the Integral Equation (6. 1). section : Bibliography