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Hille-Kneser-type criteria for second-order dynamic equations on time scales. (English) Zbl 1229.34136

Summary: We consider the pair of second-order dynamic equations, \((r(t)(x^\Delta )^\gamma)^\Delta+p(t)x^\gamma(t)=0\) and \((r(t)(x^\Delta)^\gamma)^\Delta+p(t)x^{\gamma\sigma}(t)=0\), on a time scale \(\mathbb T\), where \(\gamma>0\) is a quotient of odd positive integers. We establish some necessary and sufficient conditions for nonoscillation of Hille-Kneser type. Our results in the special case when \(\mathbb T=\mathbb R\) involve the well-known Hille-Kneser-type criteria of second-order linear differential equations established by E. Hille [Trans. Am. Math. Soc. 64, 234–252 (1948; Zbl 0031.35402)]. For the case of the second-order half-linear differential equation, our results extend and improve some earlier results of H. J. Li and Ch. Ch. Yeh [Proc. R. Soc. Edinburgh, Sect. A 125, No. 6, 1193–1204 (1995; Zbl 0873.34020)] and are related to some work of O. Došlý and P. Řehák [Half-linear differential equations. North-Holland Mathematics Studies 202. Amsterdam: Elsevier (2005, Zbl 1090.34001)] and some results of P. Řehák [Nonlinear Funct. Anal. Appl. 7, No. 3, 361–403 (2002; Zbl 1037.34002)] for half-linear equations on time scales. Several examples are considered to illustrate the main results.

MSC:

34N05 Dynamic equations on time scales or measure chains
34C10 Oscillation theory, zeros, disconjugacy and comparison theory for ordinary differential equations
39A10 Additive difference equations
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