MR0212305
Wasow, Wolfgang
Wolfgang WASOW
On the analytic validity of formal simplifications of linear differential equations. I
Funkcialaj Ekvacioj. Serio Internacia
9
1966
83--91
http://fe.math.kobe-u.ac.jp/FE/Free/vol09/fe09-15.pdf
http://fe.math.kobe-u.ac.jp/FE/FE_pdf_with_bookmark/FE01-10-en_KML/fe09-083-091/fe09-083-091.pdf
http://www.ams.org/mathscinet-getitem?mr=MR0212305
fe09-083-091
1966
On the Analytic Validity of Formal Simplifications of Linear Differential Equations, I
WASOW, Wolfgang
WASOW, Wolfgang
1
Hanson, R. J., Reduction theorems for systems of ordinary differential equations with a turning point, To be published in Jour. Math. Anal. and Applications (1966)
MR0201748
2
Iwano, M.
Asymptotic solutions of a system of linear ordinary differential equations containing a small parameter, I
Funkcialaj Ekvacioj
5
1963
71-134
MR0171045
0171045
100
Cache/Iw/Iwano,Asymptotic,Funkcialaj*,1963,1964
3
Iwano, M.; Sibuya, Y.
Reduction of the order of a linear ordinary differential equation containing a small parameter
Kodai Math. Seminar Reports
15
1963
1-28
MR0149034
Cache/Iw/Iwano,Reduction,K\=odai*,1963,1964
4
Sibuya, Y.
Asymptotic solutions of a system of linear ordinary differential equations containing a parameter
Funkcialaj Ekvaciaj
4
1962
83-113
MR0141853
0141853
100
Cache/Si/Sibuya,Asymptotic,Funkcialaj*,1962,1963
5
Wasow, W.
Turning point problems for systems of line ar equations, I. The formal theory
Comm. Pure Appl. Math.
14
1961
657-673
MR0132248
84
Cache/Wa/Wasow,equations,,Comm*,1961,1962
6
Wasow, W.
Turning point problems for systems of line ar equations, II. The analytic theory
Comm. Pure Appl. Math.
15
1962
173-187
MR0146466
84
Cache/Wa/Wasow,equations,II,Comm*,1962,1963
7
Wasow, W.
Simplification of turning point problems for systems of linear differential equations
Trans. Am. Math. Soc.
106
1963
100-114
MR0142836
100
Cache/Wa/Wasow,Simplification,Trans*,1963,1964
8
Wasow, W.
Asymptotic Expansions for Ordinary Differential Equations
Interscience (Wiley) New York
1965
362
MR0203188
Cache/Wa/Wasow,Asymptotic,Interscience*,1965,1966