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Criteria for fourth-order ordinary differential equations to be linearizable by contact transformations

โœ Scribed by S. Suksern; S.V. Meleshko; N.H. Ibragimov


Publisher
Elsevier Science
Year
2009
Tongue
English
Weight
246 KB
Volume
14
Category
Article
ISSN
1007-5704

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Necessary and Sufficient Conditions for
โœ K. Gopalsamy; Lizhi Wen; Yong-Shao Chen; Xue-Zhong He ๐Ÿ“‚ Article ๐Ÿ“… 1993 ๐Ÿ› John Wiley and Sons ๐ŸŒ English โš– 416 KB

## Abstract Necessary and sufficient conditions for a fourth order functional differential equation of the form (1) [r(t)yโ€ณ(t)]โ€ณ+f(t,y(h~1~(t)), y(h~2~(t)), โ€ฆ, y(h~n~(t)))=0 to be oscillatory are given when f is strongly superlinear or strongly sublinear.