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How the constants in Hille-Nehari theorems depend on time scales

Advances in Difference Equations volume 2006, Article number: 064534 (2006) Cite this article

Abstract

We present criteria of Hille-Nehari-type for the linear dynamic equation (r(t)yΔ)Δ + p(t)yσ = 0, that is, the criteria in terms of the limit behavior of as t → ∞. As a particular important case, we get that there is a (sharp) critical constant in those criteria which belongs to the interval [0,1/4], and its value depends on the graininess μ and the coefficient r. Also we offer some applications, for example, criteria for strong (non-) oscillation and Kneser-type criteria, comparison with existing results (our theorems turn out to be new even in the discrete case as well as in many other situations), and comments with examples.

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Affiliations

  1. Mathematical Institute, Academy of Sciences of the Czech Republic, Žižkova 22, Brno, CZ-61662, Czech Republic

    Pavel Řehák

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  1. Pavel Řehák
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Correspondence to Pavel Řehák.

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Řehák, P. How the constants in Hille-Nehari theorems depend on time scales. Adv Differ Equ 2006, 064534 (2006). https://doi.org/10.1155/ADE/2006/64534

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Keywords

  • Differential Equation
  • Partial Differential Equation
  • Ordinary Differential Equation
  • Functional Analysis
  • Functional Equation
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