TY  - BOOK
AU  - Kauffman,Robert M.
AU  - Read,Thomas T.
AU  - Zettl,Anton
ED  - SpringerLink (Online service)
TI  - The Deficiency Index Problem for Powers of Ordinary Differential Expressions
T2  - Lecture Notes in Mathematics,
SN  - 9783540370246
AV  - QA1-939 
U1  - 510 23
PY  - 1977///
CY  - Berlin, Heidelberg
PB  - Springer Berlin Heidelberg
KW  - Mathematics
KW  - Mathematics, general
N1  - Functional analytic preliminaries -- Linear differential operators and the general classification theory of deficiency indices -- Second order limit-point, limit-circle conditions -- Higher order limit-point criteria -- The deficiency index problem for polynomials in symmetric differential expressions -- Applications of perturbation theory -- Conditions on the coefficients for all powers to be limit-point
UR  - http://dx.doi.org/10.1007/BFb0064277
ER  -