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New gaps between zeros of fourth-order differential equations via Opial inequalities

TLDR
In this paper, for a fourth-order differential equation, the authors established lower bounds for the distance between zeros of a nontrivial solution and their derivatives, and for the boundary value problems in the theory of bending of beams.
Abstract
In this paper, for a fourth-order differential equation, we will establish some lower bounds for the distance between zeros of a nontrivial solution and also lower bounds for the distance between zeros of a solution and/or its derivatives. We also give some new results related to some boundary value problems in the theory of bending of beams. The main results will be proved by making use of some generalizations of Opial and Wirtinger-type inequalities. Some examples are considered to illustrate the main results. MSC: 34K11; 34C10

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Discrete, Continuous, Delta, Nabla, and Diamond-Alpha Opial Inequalities

TL;DR: In this article, the authors proved diamond-alpha dynamic inequalities of Opial type with one and two weight functions on time scales, which contain as special cases improvements of results given in the literature, and these improvements are new even in the important discrete case.
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A General Dynamic Inequality of Opial Type

TL;DR: In this paper, the authors present a new general dynamic inequality of Opial type, which is new even in both the continuous and discrete cases and is proved by making use of a recently introduced new technique for Opial dynamic inequalities, the time scales integration by parts formula.
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Distribution of zeros of solutions of self-adjoint fourth order differential equations

TL;DR: In this article, lower bounds on the distance between zeros of a nontrivial solution and their derivatives were established for self-adjoint fourth-order differential equations, by making use of some generalizations of Hardy, Opial and Wirtinger type inequalities.
References
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Journal ArticleDOI

A Lyapunov inequality for a second order nonlinear differential equation

TL;DR: A Lyapunov-type inequality is presented for the second order nonlinear equation with r, p, and f odd and positive for y > 0 and the results are compared with similar results.
Journal ArticleDOI

Lyapunov-type Inequalities for Differential Equations

TL;DR: In this article, the classical Lyapunov inequality for the linear boundary value problem was studied and the best constants were obtained by using a related variational problem and Lagrange multiplier theorem.
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Disfocality and Liapunov-type inequalities for third-order equations

TL;DR: The concept of disfocality is introduced for third-order differential equations y‴ + p(t)y = 0 to improve the Liapunov inequality and a new criteria is obtained for disconjugacy of (∗) in [a, b].

Applications of opial and wirtinger inequalities on zeros of third order differential equations

TL;DR: In this paper, the authors established new inequalities of Lyapunov type for a third order differential equation, which give implicit lower bounds on the distance between zeros of a nontrivial solution and also lower bounds for the spacing between zero derivatives.
Journal ArticleDOI

Criteria for Disfocality and Disconjugacy for Third Order Differential Equations

TL;DR: In this article, lower bounds for the spacing of the zeros of the solution and the derivative of the derivative are derived under some assumptions on p and q. The concept of disfocality is introduced for third order differential equations, which helps to improve the Liapunov-type inequality.
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