Fractional Dynamic Inequalities with Numerical Techniques and Its Application to Arbitrary Time Scales

A special issue of Symmetry (ISSN 2073-8994). This special issue belongs to the section "Mathematics".

Deadline for manuscript submissions: closed (31 January 2024) | Viewed by 3247

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Section of Mathematics, International Telematic University, Corso Vittorio Emanuele II, 39, 00186 Roma, Italy
Interests: special functions; orthogonal polynomials; differential equations; operator theory; multivariate approximation theory; Lie algebra
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Special Issue Information

Dear Colleagues,

This Special Issue is devoted to recent developments in the theory of dynamic inequalities and fractional calculus on time scales, including numerical examples such as Hermite–Hadamard’s inequality, Gronwall–Bellman’s inequality, Hardy’s inequality, Steffensen’s inequality, Hölder’s inequality, Opial’s inequality, Ostrowski’s inequality, and Hilbert’s inequality.

Inequalities lie at the heart of mathematical analysis, which is a major and important branch of mathematics. Throughout history, many researchers have discovered a great number of inequalities that are useful in many fields of mathematics. Furthermore, dynamic inequalities that provide explicit bounds on unknown functions have proved to be useful in the study of qualitative properties of the solutions of dynamic, differential, integral, and integrodifferential equations.

Fractional calculus, the theory of integrals and derivatives of non-integer order, has an important role in mathematical analysis and applications.

In 1988, Stephan Hilger introduced in his Ph.D. thesis a new theory, the theory of time scales, which builds bridges between continuous and discrete mathematics. The main idea was to prove a result for a dynamic inequality where the domain of the unknown function is a so-called time scale T, which is defined as an arbitrary closed subset of the real numbers R, to avoid proving results twice, once in the continuous case which leads to an integral inequality and once again on a discrete case which leads to a discrete inequality. Currently, the application of dynamic inequalities and fractional calculus to time scales is a subject of strong interest. It is the purpose of this Special Issue to collate some of the recent developments on this subject.

Prof. Dr. Clemente Cesarano
Guest Editor

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Published Papers (3 papers)

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20 pages, 308 KiB  
Article
Generalized Dynamic Inequalities of Copson Type on Time Scales
by Ahmed M. Ahmed, Ahmed I. Saied, Maha Ali, Mohammed Zakarya and Haytham M. Rezk
Symmetry 2024, 16(3), 288; https://doi.org/10.3390/sym16030288 - 01 Mar 2024
Cited by 1 | Viewed by 547
Abstract
This paper introduces novel generalizations of dynamic inequalities of Copson type within the framework of time scales delta calculus. The proposed generalizations leverage mathematical tools such as Hölder’s inequality, Minkowski’s inequality, the chain rule on time scales, and the properties of power rules [...] Read more.
This paper introduces novel generalizations of dynamic inequalities of Copson type within the framework of time scales delta calculus. The proposed generalizations leverage mathematical tools such as Hölder’s inequality, Minkowski’s inequality, the chain rule on time scales, and the properties of power rules on time scales. As special cases of our results, particularly when the time scale T equals the real line (T=R), we derive some classical continuous analogs of previous inequalities. Furthermore, when T corresponds to the set of natural numbers including zero (T=N0), the obtained results, to the best of the authors’ knowledge, represent innovative contributions to the field. Full article
17 pages, 333 KiB  
Article
Exploring Generalized Hardy-Type Inequalities via Nabla Calculus on Time Scales
by Haytham M. Rezk, Mahmoud I. Mohammed, Oluwafemi Samson Balogun and Ahmed I. Saied
Symmetry 2023, 15(9), 1656; https://doi.org/10.3390/sym15091656 - 27 Aug 2023
Cited by 1 | Viewed by 672
Abstract
In this research, we aim to explore generalizations of Hardy-type inequalities using nabla Hölder’s inequality, nabla Jensen’s inequality, chain rule on nabla calculus and leveraging the properties of convex and submultiplicative functions. Nabla calculus on time scales provides a unified framework that unifies [...] Read more.
In this research, we aim to explore generalizations of Hardy-type inequalities using nabla Hölder’s inequality, nabla Jensen’s inequality, chain rule on nabla calculus and leveraging the properties of convex and submultiplicative functions. Nabla calculus on time scales provides a unified framework that unifies continuous and discrete calculus, making it a powerful tool for studying various mathematical problems on time scales. By utilizing this approach, we seek to extend Hardy-type inequalities beyond their classical continuous or discrete settings to a more general time scale domain. As specific instances of our discoveries, we have the integral inequalities previously established in the existing literature. Full article
12 pages, 798 KiB  
Article
A Variety of New Explicit Analytical Soliton Solutions of q-Deformed Sinh-Gordon in (2+1) Dimensions
by Haifa I. Alrebdi, Nauman Raza, Saima Arshed, Asma Rashid Butt, Abdel-Haleem Abdel-Aty, Clemente Cesarano and Hichem Eleuch
Symmetry 2022, 14(11), 2425; https://doi.org/10.3390/sym14112425 - 16 Nov 2022
Cited by 8 | Viewed by 1340
Abstract
In this paper, the (2+1)-dimensional q-deformed Sinh-Gordon model has been investigated via (GG,1G)-expansion and Sine-Gordon-expansion methods. These techniques successfully retrieve trigonometric as well as hyperbolic solutions, along necessary restricted conditions applied on parameters. In addition [...] Read more.
In this paper, the (2+1)-dimensional q-deformed Sinh-Gordon model has been investigated via (GG,1G)-expansion and Sine-Gordon-expansion methods. These techniques successfully retrieve trigonometric as well as hyperbolic solutions, along necessary restricted conditions applied on parameters. In addition to these solutions, dark solitons and complexiton solutions have also been obtained. The proposed equation expands the possibilities for modeling physical systems in which symmetry is broken. The obtained solutions are graphically illustrated. A Painlevé analysis for the proposed model has also been discussed in this paper. Full article
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