Perturbations of matrix differential equations in the neighborhood of a singular point

MR0282017 Lutz, Donald A. Donald A. LUTZ Perturbations of matrix differential equations in the neighborhood of a singular point Funkcialaj Ekvacioj. Serio Internacia 13 1970 97--107 http://fe.math.kobe-u.ac.jp/FE/Free/vol13/fe13-9.pdf http://fe.math.kobe-u.ac.jp/FE/FE_pdf_with_bookmark/FE11-20-en_KML/fe13-097-107/fe13-097-107.pdf http://www.ams.org/mathscinet-getitem?mr=MR0282017 fe13-097-107 1970 Perturbations of Matrix Differential Equations in the Neighborhood of a Singular Point LUTZ, Donald A. LUTZ, Donald A. 1 Coddington, E. A.; Levinson, N. Theory of Ordinary Differential Equations New York, McGraw-Hill 1955 MR0069338 Cache/Co/Coddington,Orinary,*,1955,1956 2 Wasow, W. Asymptotic Expansions for Ordinary Differential Equations Academic Press, New York 1965 MR0203188 Cache/Wa/Wasow,Perturbations,*,1965,1966

3 Lutz, D. A. Linear perturbations of irregular singular systems Proc. of the U.S. Japan Sem. in Diff. and Functional Equations, Benjamin, New York 1967 555-558 Cache/Lu/Lutz,perturbations,*,1967,1968

4 Lutz, D. A. Asymptotic behavior of solutions of linear systems of ordinary differential equations near an irregular singular point Amer. Jour. Math. 91 1969 95-105 MR0241737 100 Cache/Lu/Lutz,Asymptotic,Amer*,1969,1970

5 Turrittin, H. L. Convergent solutions of ordinary linear homogeneous differential equations in the neighborhood of an irregular singular point Acta Math. 93 1955 27-66 MR0068689 100 Cache/Tu/Turrittin,homogeneous,Acta*,1955,1956

6 MacDuffee, C. C. The Theory of Matrices Chelsea, New York 1933 Data is not found in MathSci. Cache/Ma/MacDuffee,Matrices,*,1933,1934

7 Lutz, D. A. Some characterizations of systems of linear differential equations having regular singular solutions Trans. A. M. S. 126 3 1967 427-441 MR0206370 100 Cache/Lu/Lutz,characterizations,Trans*,1967,1968