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16.—Square Integrable Solutions of Perturbed Linear Differential Equations*

Published online by Cambridge University Press:  14 February 2012

James S. W. Wong
Affiliation:
Department of Mathematics, University of Iowa, U.S.A.

Synopsis

This paper is concerned with solutions of the ordinary differential equation

where ℒ is a real formally self-adjoint, linear differential expression of order 2n, and the perturbed term f satisfies

for some σ∈[0, 1]. Here λ(·) is locally integrable on [0,∞).

In particular it is shown, under circumstances detailed in the text, that (*) possesses solutions in the Hilbert function space L2(0,∞).

Type
Research Article
Copyright
Copyright © Royal Society of Edinburgh 1975

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References

1Bellman, R., A stability property of solutions of linear differential equations. Duke Math. J., 11, 513516, 1944.CrossRefGoogle Scholar
2Bellman, R., Stability theory of differential equations, New York: McGraw-Hill, 1953.Google Scholar
3Bradley, J. S., Comparison theorems for the square integrability of solutions of (r(t)y')' +q(t)y = (t,y). Glasgow Math. J., 13, 7579, 1972.CrossRefGoogle Scholar
4Goldberg, S., Unbounded linear operators. New York: McGraw-Hill, 1966.Google Scholar
5Patula, W. T. and Wong, J. S. W., O L-analogue of the Weyl alternative. Math. Ann., 197, 928, 1972.CrossRefGoogle Scholar
6Weyl, H., Über gewohnliche Differentialgleichungen mit Singularitäte und die zugehörige Entwicklung willkürlicher functionen. Math. Ann., 68, 220269, 1910.CrossRefGoogle Scholar
7Willett, D. and Wong, J. S. W., On the discrete analogues of some generalizations of Gronwall's inequality. Monatsh. Math., 69, 362367, 1965.CrossRefGoogle Scholar
8Wong, J. S. W., Remarks on the limit-circle classification of second order differential operators. Quart. J. Math. Oxford Ser., 24, 423435, 1973.CrossRefGoogle Scholar
9Zettl, A., Square integrable solutions of Ly = f(t,y). Proc. Amer. Math. Soc, 26, 635639, 1970.Google Scholar