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Necessary and sufficient conditions for asymptotic decay of oscillations in delayed functional equations†

Published online by Cambridge University Press:  14 November 2011

Lu-San Chen  and
Cheh-Chih Yeh
Lu-San Chen
Affiliation:
Institute of Mathematics, National Central University, Chung-Li, Taiwan and Institute ofMathematics, Academia Sinica, Taipei, Taiwan
Cheh-Chih Yeh
Affiliation:
Department of Mathematics, National Central University, Chung-Li, Taiwan
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Synopsis

This paper studies the equation

where the differential operator Ln is defined by

and a necessary and sufficient condition that all oscillatory solutions of the above equation converge to zero asymptotically is presented. The results obtained extend and improve previous ones of Kusano and Onose, and Singh, even in the usual case where

where N is an integer with l≦N≦n–1.

Type
Research Article
Information
Proceedings of the Royal Society of Edinburgh Section A: Mathematics , Volume 91 , Issue 1-2 , 1981 , pp. 135 - 145
Copyright
Copyright © Royal Society of Edinburgh 1981

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References

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