Hostname: page-component-7479d7b7d-8zxtt Total loading time: 0 Render date: 2024-07-13T08:32:59.357Z Has data issue: false hasContentIssue false

Estimates of Liouville-Green type for solutions of systems of differential equations

Published online by Cambridge University Press:  14 November 2011

S. B. Hadid
Affiliation:
Department of Mathematics, Chelsea College, University of London and Department of Mathematics, Educational College, University of Mosul, Iraq

Synopsis

Let P(x) and Q(x) be n × n matrices whose entries involve a single given function q(x). Under suitable conditions, estimates

of Liouville-Green type are obtained for the components yν(x) of solutions of the system

In the case n = 2, the estimate is applied to systems arising from fourth-order equations and a generalization of a result of Eastham [2] is obtained.

Type
Research Article
Copyright
Copyright © Royal Society of Edinburgh 1979

Access options

Get access to the full version of this content by using one of the access options below. (Log in options will check for institutional or personal access. Content may require purchase if you do not have access.)

References

1Anderson, R. L.. Limit-point and limit-circle criteria for a class of singular symmetric differential operators. Canad. J. Math. 28 (1976) 905914.CrossRefGoogle Scholar
2Eastham, M. S. P.. Square-integrable solutions of the differential equation y(4) + a(qy′)′ + (bq2 + q″)y = 0. Nieuw Arch. Wisk. 24 (1976) 256269.Google Scholar
3Eastham, M. S. P.. The limit-4 case of fourth-order self-adjoint differential equations. Proc. Roy. Soc. Edinb. Sect. A 79 (1977) 5159.CrossRefGoogle Scholar
4Eastham, M. S. P.. Self-adjoint differential equations with all solutions L 2(0, ∞). Proc. Uppsala 1977 Conf. Differential Equations, 52–61 (Uppsala, 1977).Google Scholar
5Eastham, M. S. P.. The limit-2n case of symmetric differential operators of order 2n. Proc. London Math. Soc. (to appear).Google Scholar
6Knowles, I. W.. On second-order differential operators of limit-circle type. Proc. Conf. Ordinary and Patrial Differential Equations, Dundee 1974. Lecture Notes in Mathematics 415, 184187 (Berlin: Springer, 1974).Google Scholar
7Kuptsov, N. P.. An estimate for solutions of a system of linear differential equations, Uspehi Math. Nauk 18 (1963), 159164.Google Scholar
8Olver, F. W. J.. Asymptotics and special functions (New York: Academic Press, 1974).Google Scholar