167 results
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2. Generalized n -Polynomial p -Convexity and Related Inequalities.
- Author
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Özcan, Serap and Cotîrlă, Luminiţa-Ioana
- Subjects
MATHEMATICAL instruments ,ABSOLUTE value ,CONVEXITY spaces ,CONVEX functions ,INTEGRAL inequalities - Abstract
In this paper, we construct a new class of convex functions, so-called generalized n-polynomial p-convex functions. We investigate their algebraic properties and provide some relationships between these functions and other types of convex functions. We establish Hermite–Hadamard (H–H) inequality for the newly defined class of functions. Additionally, we derive refinements of H–H inequality for functions whose first derivatives in absolute value at certain power are generalized n-polynomial p-convex. When p = − 1 , our definition evolves into a new definition for the class of convex functions so-called generalized n-polynomial harmonically convex functions. The results obtained in this study generalize regarding those found in the existing literature. By extending these particular types of inequalities, the objective is to unveil fresh mathematical perspectives, attributes and connections that can enhance the evolution of more resilient mathematical methodologies. This study aids in the progression of mathematical instruments across diverse scientific fields. [ABSTRACT FROM AUTHOR]
- Published
- 2024
- Full Text
- View/download PDF
3. Two Extensions of the Sugeno Class and a Novel Constructed Method of Strong Fuzzy Negation for the Generation of Non-Symmetric Fuzzy Implications.
- Author
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Rapti, Maria N., Konguetsof, Avrilia, and Papadopoulos, Basil K.
- Subjects
PRODUCTION methods ,QUADRATIC forms ,CONVEX functions ,EQUILIBRIUM - Abstract
In this paper, we present two new classes of fuzzy negations. They are an extension of a well-known class of fuzzy negations, the Sugeno Class. We use it as a base for our work for the first two construction methods. The first method generates rational fuzzy negations, where we use a second-degree polynomial with two parameters. We investigate which of these two conditions must be satisfied to be a fuzzy negation. In the second method, we use an increasing function instead of the parameter δ of the Sugeno class. In this method, using an arbitrary increasing function with specific conditions, fuzzy negations are produced, not just rational ones. Moreover, we compare the equilibrium points of the produced fuzzy negation of the first method and the Sugeno class. We use the equilibrium point to present a novel method which produces strong fuzzy negations by using two decreasing functions which satisfy specific conditions. We also investigate the convexity of the new fuzzy negation. We give some conditions that coefficients of fuzzy negation of the first method must satisfy in order to be convex. We present some examples of the new fuzzy negations, and we use them to generate new non-symmetric fuzzy implications by using well-known production methods of non-symmetric fuzzy implications. We use convex fuzzy negations as decreasing functions to construct an Archimedean copula. Finally, we investigate the quadratic form of the copula and the conditions that the coefficients of the first method and the increasing function of the second method must satisfy in order to generate new copulas of this form. [ABSTRACT FROM AUTHOR]
- Published
- 2024
- Full Text
- View/download PDF
4. Refinements and Applications of Hermite–Hadamard-Type Inequalities Using Hadamard Fractional Integral Operators and GA -Convexity.
- Author
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Amer Latif, Muhammad
- Subjects
INTEGRAL inequalities ,GAMMA functions ,FRACTIONAL integrals ,INTEGRAL operators ,CONVEX functions - Abstract
In this paper, several applications of the Hermite–Hadamard inequality for fractional integrals using G A -convexity are discussed, including some new refinements and similar extensions, as well as several applications in the Gamma and incomplete Gamma functions. [ABSTRACT FROM AUTHOR]
- Published
- 2024
- Full Text
- View/download PDF
5. Further Geometric Properties of the Barnes–Mittag-Leffler Function.
- Author
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Alenazi, Abdulaziz and Mehrez, Khaled
- Subjects
GAMMA functions ,STAR-like functions ,ANALYTIC functions ,UNIVALENT functions ,CONVEX functions - Abstract
In this paper, we find sufficient conditions to be imposed on the parameters of a class of functions related to the Barnes–Mittag-Leffler function that allow us to conclude that it possesses certain geometric properties (such as starlikeness, uniformly starlike (convex), strongly starlike (convex), convexity, and close-to-convexity) in the unit disk. The key tools in some of our proofs are the monotonicity properties of a certain class of functions related to the gamma function. [ABSTRACT FROM AUTHOR]
- Published
- 2024
- Full Text
- View/download PDF
6. Coefficient Results concerning a New Class of Functions Associated with Gegenbauer Polynomials and Convolution in Terms of Subordination.
- Author
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Olatunji, Sunday Olufemi, Oluwayemi, Matthew Olanrewaju, and Oros, Georgia Irina
- Subjects
GEGENBAUER polynomials ,GEOMETRIC function theory ,ANALYTIC functions ,UNIVALENT functions ,ERROR functions ,STAR-like functions - Abstract
Gegenbauer polynomials constitute a numerical tool that has attracted the interest of many function theorists in recent times mainly due to their real-life applications in many areas of the sciences and engineering. Their applications in geometric function theory (GFT) have also been considered by many researchers. In this paper, this powerful tool is associated with the prolific concepts of convolution and subordination. The main purpose of the research contained in this paper is to introduce and study a new subclass of analytic functions. This subclass is presented using an operator defined as the convolution of the generalized distribution and the error function and applying the principle of subordination. Investigations into this subclass are considered in connection to Carathéodory functions, the modified sigmoid function and Bell numbers to obtain coefficient estimates for the contained functions. [ABSTRACT FROM AUTHOR]
- Published
- 2023
- Full Text
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7. Some Estimates of k -Fractional Integrals for Various Kinds of Exponentially Convex Functions.
- Author
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Liu, Yonghong, Anwar, Matloob, Farid, Ghulam, and Khan, Hala Safdar
- Subjects
INTEGRAL operators ,INTEGRALS ,KERNEL functions ,CONVEX functions ,FRACTIONAL integrals ,INTEGRAL inequalities - Abstract
In this paper, we aim to find unified estimates of fractional integrals involving Mittag–Leffler functions in kernels. The results obtained in terms of fractional integral inequalities are provided for various kinds of convex and related functions. A variant of Hadamard-type inequality is also presented, which shows the upper and lower bounds of fractional integral operators of many kinds. The results of this paper are directly linked with many recently published inequalities. [ABSTRACT FROM AUTHOR]
- Published
- 2023
- Full Text
- View/download PDF
8. Third-Order Differential Subordinations Using Fractional Integral of Gaussian Hypergeometric Function.
- Author
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Oros, Georgia Irina, Oros, Gheorghe, and Preluca, Lavinia Florina
- Subjects
GAUSSIAN function ,FRACTIONAL integrals ,HYPERGEOMETRIC functions ,CONVEX functions ,DIFFERENTIAL equations ,ANALYTIC functions - Abstract
Sanford S. Miller and Petru T. Mocanu's theory of second-order differential subordinations was extended for the case of third-order differential subordinations by José A. Antonino and Sanford S. Miller in 2011. In this paper, new results are proved regarding third-order differential subordinations that extend the ones involving the classical second-order differential subordination theory. A method for finding a dominant of a third-order differential subordination is provided when the behavior of the function is not known on the boundary of the unit disc. Additionally, a new method for obtaining the best dominant of a third-order differential subordination is presented. This newly proposed method essentially consists of finding the univalent solution for the differential equation that corresponds to the differential subordination considered in the investigation; previous results involving third-order differential subordinations have been obtained mainly by investigating specific classes of admissible functions. The fractional integral of the Gaussian hypergeometric function, previously associated with the theory of fuzzy differential subordination, is used in this paper to obtain an interesting third-order differential subordination by involving a specific convex function. The best dominant is also provided, and the example presented proves the importance of the theoretical results involving the fractional integral of the Gaussian hypergeometric function. [ABSTRACT FROM AUTHOR]
- Published
- 2023
- Full Text
- View/download PDF
9. Derivation of Bounds for Majorization Differences by a Novel Method and Its Applications in Information Theory.
- Author
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Basir, Abdul, Khan, Muhammad Adil, Ullah, Hidayat, Almalki, Yahya, Chasreechai, Saowaluck, and Sitthiwirattham, Thanin
- Subjects
MATHEMATICAL inequalities ,JENSEN'S inequality ,RESEARCH & development - Abstract
In the recent era of research developments, mathematical inequalities and their applications perform a very consequential role in different aspects, and they provide an engaging area for research activities. In this paper, we propose a new approach for the improvement of the classical majorization inequality and its weighted versions in a discrete sense. The proposed improvements give several estimates for the majorization differences. Some earlier improvements of the Jensen and Slater inequalities are deduced as direct consequences of the obtained results. We also discuss the conditions under which the main results give better estimates for the majorization differences. Applications of the acquired results are also presented in information theory. [ABSTRACT FROM AUTHOR]
- Published
- 2023
- Full Text
- View/download PDF
10. Hermite-Hadamard-Type Integral Inequalities for Convex Functions and Their Applications.
- Author
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Srivastava, Hari M., Mehrez, Sana, and Sitnik, Sergei M.
- Subjects
CONVEX functions ,INTEGRAL inequalities ,REAL numbers ,EIGENFUNCTIONS ,ARITHMETIC - Abstract
In this paper, we establish new generalizations of the Hermite-Hadamard-type inequalities. These inequalities are formulated in terms of modules of certain powers of proper functions. Generalizations for convex functions are also considered. As applications, some new inequalities for the digamma function in terms of the trigamma function and some inequalities involving special means of real numbers are given. The results also include estimates via arithmetic, geometric and logarithmic means. The examples are derived in order to demonstrate that some of our results in this paper are more exact than the existing ones and some improve several known results available in the literature. The constants in the derived inequalities are calculated; some of these constants are sharp. As a visual example, graphs of some technically important functions are included in the text. [ABSTRACT FROM AUTHOR]
- Published
- 2022
- Full Text
- View/download PDF
11. A Brief Overview and Survey of the Scientific Work by Feng Qi.
- Author
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Agarwal, Ravi Prakash, Karapinar, Erdal, Kostić, Marko, Cao, Jian, and Du, Wei-Shih
- Subjects
MATHEMATICIANS ,MONOTONIC functions ,BERNOULLI numbers ,GAMMA functions ,SPECIAL functions - Abstract
In the paper, the authors present a brief overview and survey of the scientific work by Chinese mathematician Feng Qi and his coauthors. [ABSTRACT FROM AUTHOR]
- Published
- 2022
- Full Text
- View/download PDF
12. On Bounds of k -Fractional Integral Operators with Mittag-Leffler Kernels for Several Types of Exponentially Convexities.
- Author
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Farid, Ghulam, Khan, Hala Safdar, Tawfiq, Ferdous M. O., Ro, Jong-Suk, and Zainab, Saira
- Subjects
INTEGRAL operators ,PUBLISHED articles ,GENERALIZED integrals ,CONVEX functions - Abstract
This paper aims to study the bounds of k-integral operators with the Mittag-Leffler kernel in a unified form. To achieve these bounds, the definition of exponentially (α , h − m) − p -convexity is utilized frequently. In addition, a fractional Hadamard type inequality which shows the upper and lower bounds of k-integral operators simultaneously is presented. The results are directly linked with the results of many published articles. [ABSTRACT FROM AUTHOR]
- Published
- 2023
- Full Text
- View/download PDF
13. Fejér-Type Inequalities for Harmonically Convex Functions and Related Results.
- Author
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Amer Latif, Muhammad
- Subjects
CONVEX functions - Abstract
In this paper, new Fejér-type inequalities for harmonically convex functions are obtained. Some mappings related to the Fejér-type inequalities for harmonically convex are defined. Properties of these mappings are discussed and, as a consequence, we obtain refinements of some known results. [ABSTRACT FROM AUTHOR]
- Published
- 2023
- Full Text
- View/download PDF
14. Some New Estimates of Hermite–Hadamard Inequality with Application.
- Author
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Zhang, Tao and Chen, Alatancang
- Subjects
INTEGRAL inequalities ,CONVEX functions - Abstract
This paper establishes several new inequalities of Hermite–Hadamard type for | f ′ | q being convex for some fixed q ∈ (0 , 1 ] . As application, some error estimates on special means of real numbers are given. [ABSTRACT FROM AUTHOR]
- Published
- 2023
- Full Text
- View/download PDF
15. New Applications of Gaussian Hypergeometric Function for Developments on Third-Order Differential Subordinations.
- Author
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Oros, Georgia Irina, Oros, Gheorghe, and Preluca, Lavinia Florina
- Subjects
GAUSSIAN function ,HYPERGEOMETRIC functions ,FRACTIONAL integrals ,ANALYTIC functions ,CONVEX functions - Abstract
The main objective of this paper is to present classical second-order differential subordination knowledge extended in this study to include new results regarding third-order differential subordinations. The focus of this study is on the main problems examined by differential subordination theory. Hence, the new results obtained here reveal techniques for identifying dominants and the best dominant of certain third-order differential subordinations. Another aspect of novelty is the new application of the Gaussian hypergeometric function. Novel third-order differential subordination results are obtained using the best dominant provided by the theorems and the operator previously defined as Gaussian hypergeometric function's fractional integral. The research investigation is concluded by giving an example of how the results can be implemented. [ABSTRACT FROM AUTHOR]
- Published
- 2023
- Full Text
- View/download PDF
16. Some New Post-Quantum Simpson's Type Inequalities for Coordinated Convex Functions.
- Author
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Wannalookkhee, Fongchan, Nonlaopon, Kamsing, Ntouyas, Sotiris K., Sarikaya, Mehmet Zeki, and Budak, Hüseyin
- Subjects
INTEGRAL inequalities ,CONVEX functions ,CALCULUS - Abstract
In this paper, we establish some new Simpson's type inequalities for coordinated convex functions by using post-quantum calculus. The results raised in this paper provide significant extensions and generalizations of other related results given in earlier works. [ABSTRACT FROM AUTHOR]
- Published
- 2022
- Full Text
- View/download PDF
17. Inequalities for Fractional Integrals of a Generalized Class of Strongly Convex Functions.
- Author
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Yan, Tao, Farid, Ghulam, Yasmeen, Hafsa, Shim, Soo Hak, and Jung, Chahn Yong
- Subjects
FRACTIONAL integrals ,GENERALIZED integrals ,CONVEX functions ,MATHEMATICAL inequalities ,INTEGRAL operators ,INTEGRAL inequalities - Abstract
Fractional integral operators are useful tools for generalizing classical integral inequalities. Convex functions play very important role in the theory of mathematical inequalities. This paper aims to investigate the Hadamard type inequalities for a generalized class of functions namely strongly (α , h − m) -p-convex functions by using Riemann–Liouville fractional integrals. The results established in this paper give refinements of various well-known inequalities which have been published in the recent past. [ABSTRACT FROM AUTHOR]
- Published
- 2022
- Full Text
- View/download PDF
18. New Applications of Fuzzy Set Concept in the Geometric Theory of Analytic Functions.
- Author
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Alb Lupaş, Alina
- Subjects
GEOMETRIC function theory ,FUZZY sets ,UNIVALENT functions ,SET theory ,CONVEX functions ,ANALYTIC functions - Abstract
Zadeh's fuzzy set theory offers a logical, adaptable solution to the challenge of defining, assessing and contrasting various sustainability scenarios. The results presented in this paper use the fuzzy set concept embedded into the theories of differential subordination and superordination established and developed in geometric function theory. As an extension of the classical concept of differential subordination, fuzzy differential subordination was first introduced in geometric function theory in 2011. In order to generalize the idea of fuzzy differential superordination, the dual notion of fuzzy differential superordination was developed later, in 2017. The two dual concepts are applied in this article making use of the previously introduced operator defined as the convolution product of the generalized Sălgean operator and the Ruscheweyh derivative. Using this operator, a new subclass of functions, normalized analytic in U, is defined and investigated. It is proved that this class is convex, and new fuzzy differential subordinations are established by applying known lemmas and using the functions from the new class and the aforementioned operator. When possible, the fuzzy best dominants are also indicated for the fuzzy differential subordinations. Furthermore, dual results involving the theory of fuzzy differential superordinations and the convolution operator are established for which the best subordinants are also given. Certain corollaries obtained by using particular convex functions as fuzzy best dominants or fuzzy best subordinants in the proved theorems and the numerous examples constructed both for the fuzzy differential subordinations and for the fuzzy differential superordinations prove the applicability of the new theoretical results presented in this study. [ABSTRACT FROM AUTHOR]
- Published
- 2023
- Full Text
- View/download PDF
19. Fuzzy Differential Inequalities for Convolution Product of Ruscheweyh Derivative and Multiplier Transformation.
- Author
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Alb Lupaş, Alina
- Subjects
DIFFERENTIAL inequalities ,GEOMETRIC function theory ,DIFFERENTIAL operators - Abstract
In this paper, the author combines the geometric theory of analytic function regarding differential superordination and subordination with fuzzy theory for the convolution product of Ruscheweyh derivative and multiplier transformation. Interesting fuzzy inequalities are obtained by the author. [ABSTRACT FROM AUTHOR]
- Published
- 2023
- Full Text
- View/download PDF
20. Some Families of Jensen-like Inequalities with Application to Information Theory.
- Author
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Merhav, Neri
- Subjects
JENSEN'S inequality ,CONVEX functions ,RANDOM variables ,INFORMATION theory ,QUADRATIC equations - Abstract
It is well known that the traditional Jensen inequality is proved by lower bounding the given convex function, f (x) , by the tangential affine function that passes through the point (E { X } , f (E { X })) , where E { X } is the expectation of the random variable X. While this tangential affine function yields the tightest lower bound among all lower bounds induced by affine functions that are tangential to f, it turns out that when the function f is just part of a more complicated expression whose expectation is to be bounded, the tightest lower bound might belong to a tangential affine function that passes through a point different than (E { X } , f (E { X })) . In this paper, we take advantage of this observation by optimizing the point of tangency with regard to the specific given expression in a variety of cases and thereby derive several families of inequalities, henceforth referred to as "Jensen-like" inequalities, which are new to the best knowledge of the author. The degree of tightness and the potential usefulness of these inequalities is demonstrated in several application examples related to information theory. [ABSTRACT FROM AUTHOR]
- Published
- 2023
- Full Text
- View/download PDF
21. A Comprehensive Review of the Hermite–Hadamard Inequality Pertaining to Fractional Integral Operators.
- Author
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Tariq, Muhammad, Ntouyas, Sotiris K., and Shaikh, Asif Ali
- Subjects
FRACTIONAL integrals ,INTEGRAL operators ,FRACTIONAL calculus ,CONVEX functions ,SYMMETRIC functions ,INTEGRAL functions - Abstract
In the frame of fractional calculus, the term convexity is primarily utilized to address several challenges in both pure and applied research. The main focus and objective of this review paper is to present Hermite–Hadamard (H-H)-type inequalities involving a variety of classes of convexities pertaining to fractional integral operators. Included in the various classes of convexities are classical convex functions, m-convex functions, r-convex functions, (α , m) -convex functions, (α , m) -geometrically convex functions, harmonically convex functions, harmonically symmetric functions, harmonically (θ , m) -convex functions, m-harmonic harmonically convex functions, (s , r) -convex functions, arithmetic–geometric convex functions, logarithmically convex functions, (α , m) -logarithmically convex functions, geometric–arithmetically s-convex functions, s-convex functions, Godunova–Levin-convex functions, differentiable ϕ -convex functions, M T -convex functions, (s , m) -convex functions, p-convex functions, h-convex functions, σ -convex functions, exponential-convex functions, exponential-type convex functions, refined exponential-type convex functions, n-polynomial convex functions, σ , s -convex functions, modified (p , h) -convex functions, co-ordinated-convex functions, relative-convex functions, quasi-convex functions, (α , h − m) − p -convex functions, and preinvex functions. Included in the fractional integral operators are Riemann–Liouville (R-L) fractional integral, Katugampola fractional integral, k-R-L fractional integral, (k , s) -R-L fractional integral, Caputo-Fabrizio (C-F) fractional integral, R-L fractional integrals of a function with respect to another function, Hadamard fractional integral, and Raina fractional integral operator. [ABSTRACT FROM AUTHOR]
- Published
- 2023
- Full Text
- View/download PDF
22. New Generalized Hermite–Hadamard–Mercer's Type Inequalities Using (k , ψ)-Proportional Fractional Integral Operator.
- Author
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Desta, Henok Desalegn, Nwaeze, Eze R., Abdi, Tadesse, and Mijena, Jebessa B.
- Subjects
VARIATIONAL inequalities (Mathematics) ,FRACTIONAL integrals ,OPERATOR theory ,CONVEX functions ,MATHEMATICAL analysis - Abstract
In this paper, by using Jensen–Mercer's inequality we obtain Hermite–Hadamard–Mercer's type inequalities for a convex function employing left-sided (k , ψ) -proportional fractional integral operators involving continuous strictly increasing function. Our findings are a generalization of some results that existed in the literature. [ABSTRACT FROM AUTHOR]
- Published
- 2023
- Full Text
- View/download PDF
23. Some Local Fractional Inequalities Involving Fractal Sets via Generalized Exponential (s , m)-Convexity.
- Author
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Saleh, Wedad and Kılıçman, Adem
- Subjects
FRACTALS ,PROBABILITY density function ,FRACTIONAL integrals ,SPECIAL functions ,CONVEX functions ,INTEGRAL inequalities - Abstract
Research in this paper aims to explore the concept of generalized exponentially ( s , m )-convex functions, and to determine some properties of these functions. In addition, we look at some interactions between generalized exponentially ( s , m )-convex functions and local fractional integrals. The properties of the generalized new special cases of ( s , m )-convex functions, s-convex functions, and also generalized m-convex functions are impressive. We derive some inequalities of Hadamard's type for generalized exponentially ( s , m )-convex functions, and give applications in probability density functions and generalized special methods to attest to the applicability and efficiency of the method under consideration. [ABSTRACT FROM AUTHOR]
- Published
- 2023
- Full Text
- View/download PDF
24. Differential Subordination and Superordination Results for q -Analogue of Multiplier Transformation.
- Author
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Alb Lupaş, Alina and Cătaş, Adriana
- Subjects
UNIVALENT functions ,ANALYTIC functions ,DIFFERENTIAL operators ,CALCULUS ,CONVEX functions - Abstract
The results obtained by the authors in the present paper refer to quantum calculus applications regarding the theories of differential subordination and superordination. These results are established by means of an operator defined as the q-analogue of the multiplier transformation. Interesting differential subordination and superordination results are derived by the authors involving the functions belonging to a new class of normalized analytic functions in the open unit disc U, which is defined and investigated here by using this q-operator. [ABSTRACT FROM AUTHOR]
- Published
- 2023
- Full Text
- View/download PDF
25. Some Companions of Fejér Type Inequalities Using GA-Convex Functions.
- Author
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Latif, Muhammad Amer
- Subjects
CONVEX functions ,INTEGRAL inequalities - Abstract
In this paper, we present some new and novel mappings defined over 0 , 1 with the help of G A -convex functions. As a consequence, we obtain companions of Fejér-type inequalities for G A -convex functions with the help of these mappings, which provide refinements of some known results. The properties of these mappings are discussed as well. [ABSTRACT FROM AUTHOR]
- Published
- 2023
- Full Text
- View/download PDF
26. On New Estimates of q -Hermite–Hadamard Inequalities with Applications in Quantum Calculus.
- Author
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Chasreechai, Saowaluck, Ali, Muhammad Aamir, Ashraf, Muhammad Amir, Sitthiwirattham, Thanin, Etemad, Sina, Sen, Manuel De la, and Rezapour, Shahram
- Subjects
CALCULUS ,CONVEX functions ,DIFFERENTIAL calculus ,INTEGRALS - Abstract
In this paper, we first establish two quantum integral (q-integral) identities with the help of derivatives and integrals of the quantum types. Then, we prove some new q-midpoint and q-trapezoidal estimates for the newly established q-Hermite-Hadamard inequality (involving left and right integrals proved by Bermudo et al.) under q-differentiable convex functions. Finally, we provide some examples to illustrate the validity of newly obtained quantum inequalities. [ABSTRACT FROM AUTHOR]
- Published
- 2023
- Full Text
- View/download PDF
27. On Classes of Non-Carathéodory Functions Associated with a Family of Functions Starlike in the Direction of the Real Axis.
- Author
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Karthikeyan, Kadhavoor R., Cho, Nak Eun, and Murugusundaramoorthy, Gangadharan
- Subjects
ANALYTIC functions ,STAR-like functions ,INTEGRAL representations ,UNIVALENT functions ,CONVEX functions - Abstract
In this paper, we introduce a new class of analytic functions subordinated by functions which is not Carathéodory. We have obtained some interesting subordination properties, inclusion and integral representation of the defined function class. Several corollaries are presented to highlight the applications of our main results. [ABSTRACT FROM AUTHOR]
- Published
- 2023
- Full Text
- View/download PDF
28. A Study on the Modified Form of Riemann-Type Fractional Inequalities via Convex Functions and Related Applications.
- Author
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Samraiz, Muhammad, Malik, Maria, Saeed, Kanwal, Naheed, Saima, Etemad, Sina, De la Sen, Manuel, and Rezapour, Shahram
- Subjects
FRACTIONAL integrals ,GENERALIZED integrals ,SYMMETRIC functions ,ABSOLUTE value ,CONVEX functions - Abstract
In this article, we provide constraints for the sum by employing a generalized modified form of fractional integrals of Riemann-type via convex functions. The mean fractional inequalities for functions with convex absolute value derivatives are discovered. Hermite–Hadamard-type fractional inequalities for a symmetric convex function are explored. These results are achieved using a fresh and innovative methodology for the modified form of generalized fractional integrals. Some applications for the results explored in the paper are briefly reviewed. [ABSTRACT FROM AUTHOR]
- Published
- 2022
- Full Text
- View/download PDF
29. A General-Purpose Multi-Dimensional Convex Landscape Generator.
- Author
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Liu, Wenwen, Yuen, Shiu Yin, Chung, Kwok Wai, and Sung, Chi Wan
- Subjects
CONVEX functions ,CODE generators ,EVOLUTIONARY algorithms ,COMPUTATIONAL geometry ,CONVEX sets ,POLYGONS - Abstract
Heuristic and evolutionary algorithms are proposed to solve challenging real-world optimization problems. In the evolutionary community, many benchmark problems for empirical evaluations of algorithms have been proposed. One of the most important classes of test problems is the class of convex functions, particularly the d-dimensional sphere function. However, the convex function type is somewhat limited. In principle, one can select a set of convex basis functions and use operations that preserve convexity to generate a family of convex functions. This method will inevitably introduce bias in favor of the basis functions. In this paper, the problem is solved by employing insights from computational geometry, which gives the first-ever general-purpose multi-dimensional convex landscape generator. The new proposed generator has the advantage of being generic, which means that it has no bias toward a specific analytical function. A set of N random d-dimensional points is generated for the construction of a d-dimensional convex hull. The upper part of the convex hull is removed by considering the normal of the polygons. The remaining part defines a convex function. It is shown that the complexity of constructing the function is O (M d 3) , where M is the number of polygons of the convex function. For the method to work as a benchmark function, queries of an arbitrary (d − 1) dimensional input are generated, and the generator has to return the value of the convex function. The complexity of answering the query is O (M d) . The convexity of the function from the generator is verified with a nonconvex ratio test. The performance of the generator is also evaluated using the Broyden–Fletcher–Goldfarb–Shanno (BFGS) gradient descent algorithm. The source code of the generator is available. [ABSTRACT FROM AUTHOR]
- Published
- 2022
- Full Text
- View/download PDF
30. New Fractional Integral Inequalities Pertaining to Caputo–Fabrizio and Generalized Riemann–Liouville Fractional Integral Operators.
- Author
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Tariq, Muhammad, Alsalami, Omar Mutab, Shaikh, Asif Ali, Nonlaopon, Kamsing, and Ntouyas, Sotiris K.
- Subjects
INTEGRAL inequalities ,FRACTIONAL integrals ,INTEGRAL operators ,FRACTIONAL calculus ,CONVEX functions ,HEALTH equity - Abstract
Integral inequalities have accumulated a comprehensive and prolific field of research within mathematical interpretations. In recent times, strategies of fractional calculus have become the subject of intensive research in historical and contemporary generations because of their applications in various branches of science. In this paper, we concentrate on establishing Hermite–Hadamard and Pachpatte-type integral inequalities with the aid of two different fractional operators. In particular, we acknowledge the critical Hermite–Hadamard and related inequalities for n-polynomial s-type convex functions and n-polynomial s-type harmonically convex functions. We practice these inequalities to consider the Caputo–Fabrizio and the k-Riemann–Liouville fractional integrals. Several special cases of our main results are also presented in the form of corollaries and remarks. Our study offers a better perception of integral inequalities involving fractional operators. [ABSTRACT FROM AUTHOR]
- Published
- 2022
- Full Text
- View/download PDF
31. Some Companions of Fejér-Type Inequalities for Harmonically Convex Functions.
- Author
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Latif, Muhammad Amer
- Subjects
CONVEX functions ,INTEGRAL inequalities ,HARMONIC functions - Abstract
In this paper, we present some mappings defined over 0 , 1 related to the Fejér-type inequalities that have been established for harmonically convex functions. As a consequence, we obtain companions of Fejér-type inequalities for harmonically convex functions by using these mappings. Properties of these mappings are discussed, and consequently, we obtain refinement inequalities of some known results. [ABSTRACT FROM AUTHOR]
- Published
- 2022
- Full Text
- View/download PDF
32. Some New Refinements of Trapezium-Type Integral Inequalities in Connection with Generalized Fractional Integrals.
- Author
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Tariq, Muhammad, Sahoo, Soubhagya Kumar, Ntouyas, Sotiris K., Alsalami, Omar Mutab, Shaikh, Asif Ali, and Nonlaopon, Kamsing
- Subjects
GENERALIZED integrals ,FRACTIONAL integrals ,INTEGRAL inequalities ,INTEGRAL operators ,CONVEX functions ,EXPONENTIAL functions - Abstract
The main objective of this article is to introduce a new notion of convexity, i.e., modified exponential type convex function, and establish related fractional inequalities. To strengthen the argument of the paper, we introduce two new lemmas as auxiliary results and discuss some algebraic properties of the proposed notion. Considering a generalized fractional integral operator and differentiable mappings, whose initial absolute derivative at a given power is a modified exponential type convex, various improvements of the Hermite–Hadamard inequality are presented. Thanks to the main results, some generalizations about the earlier findings in the literature are recovered. [ABSTRACT FROM AUTHOR]
- Published
- 2022
- Full Text
- View/download PDF
33. Some New Mathematical Integral Inequalities Pertaining to Generalized Harmonic Convexity with Applications.
- Author
-
Tariq, Muhammad, Sahoo, Soubhagya Kumar, Ntouyas, Sotiris K., Alsalami, Omar Mutab, Shaikh, Asif Ali, and Nonlaopon, Kamsing
- Abstract
The subject of convex analysis and integral inequalities represents a comprehensive and absorbing field of research within the field of mathematical interpretation. In recent times, the strategies of convex theory and integral inequalities have become the subject of intensive research at historical and contemporary times because of their applications in various branches of sciences. In this work, we reveal the idea of a new version of generalized harmonic convexity i.e., an m–polynomial p–harmonic s–type convex function. We discuss this new idea by employing some examples and demonstrating some interesting algebraic properties. Furthermore, this work leads us to establish some new generalized Hermite–Hadamard- and generalized Ostrowski-type integral identities. Additionally, employing Hölder's inequality and the power-mean inequality, we present some refinements of the H–H (Hermite–Hadamard) inequality and Ostrowski inequalities. Finally, we investigate some applications to special means involving the established results. These new results yield us some generalizations of the prior results in the literature. We believe that the methodology and concept examined in this paper will further inspire interested researchers. [ABSTRACT FROM AUTHOR]
- Published
- 2022
- Full Text
- View/download PDF
34. Logical Entropy of Information Sources.
- Author
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Xu, Peng, Sayyari, Yamin, and Butt, Saad Ihsan
- Subjects
ENTROPY (Information theory) ,INFORMATION resources ,RANDOM variables ,CONVEX functions ,TOPOLOGICAL entropy ,ENTROPY - Abstract
In this paper, we present the concept of the logical entropy of order m, logical mutual information, and the logical entropy for information sources. We found upper and lower bounds for the logical entropy of a random variable by using convex functions. We show that the logical entropy of the joint distributions X 1 and X 2 is always less than the sum of the logical entropy of the variables X 1 and X 2 . We define the logical Shannon entropy and logical metric permutation entropy to an information system and examine the properties of this kind of entropy. Finally, we examine the amount of the logical metric entropy and permutation logical entropy for maps. [ABSTRACT FROM AUTHOR]
- Published
- 2022
- Full Text
- View/download PDF
35. Application of a Multiplier Transformation to Libera Integral Operator Associated with Generalized Distribution.
- Author
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Hamzat, Jamiu Olusegun, Oladipo, Abiodun Tinuoye, and Oros, Georgia Irina
- Subjects
INTEGRAL operators ,MATHEMATICAL convolutions ,ANALYTIC functions ,DISTRIBUTION (Probability theory) ,STAR-like functions ,CONVEX functions - Abstract
The research presented in this paper deals with analytic p-valent functions related to the generalized probability distribution in the open unit disk U. Using the Hadamard product or convolution, function f s (z) is defined as involving an analytic p-valent function and generalized distribution expressed in terms of analytic p-valent functions. Neighborhood properties for functions f s (z) are established. Further, by applying a previously introduced linear transformation to f s (z) and using an extended Libera integral operator, a new generalized Libera-type operator is defined. Moreover, using the same linear transformation, subclasses of starlike, convex, close-to-convex and spiralike functions are defined and investigated in order to obtain geometrical properties that characterize the new generalized Libera-type operator. Symmetry properties are due to the involvement of the Libera integral operator and convolution transform. [ABSTRACT FROM AUTHOR]
- Published
- 2022
- Full Text
- View/download PDF
36. New Results about Radius of Convexity and Uniform Convexity of Bessel Functions.
- Author
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Cotîrlă, Luminiţa-Ioana, Kupán, Pál Aurel, and Szász, Róbert
- Subjects
BESSEL functions ,HANKEL functions ,CONVEX functions - Abstract
We determine in this paper new results about the radius of uniform convexity of two kinds of normalization of the Bessel function J ν in the case ν ∈ (− 2 , − 1) , and provide an alternative proof regarding the radius of convexity of order alpha. We then compare results regarding the convexity and uniform convexity of the considered functions and determine interesting connections between them. [ABSTRACT FROM AUTHOR]
- Published
- 2022
- Full Text
- View/download PDF
37. New Diamond- α Steffensen-Type Inequalities for Convex Functions over General Time Scale Measure Spaces.
- Author
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Smoljak Kalamir, Ksenija
- Subjects
DIFFERENTIAL calculus ,CONVEX functions ,CALCULUS ,TIME management - Abstract
In this paper, we extend some Steffensen-type inequalities to time scales by using the diamond- α -dynamic integral. Further, we prove some new Steffensen-type inequalities for convex functions utilizing positive σ -finite measures in time scale calculus. Moreover, as a special case, we obtain these inequalities for the delta and the nabla integral. By using the relation between calculus on time scales T and differential calculus on R , we obtain already-known Steffensen-type inequalities. [ABSTRACT FROM AUTHOR]
- Published
- 2022
- Full Text
- View/download PDF
38. A Quantum Calculus View of Hermite–Hadamard–Jensen–Mercer Inequalities with Applications.
- Author
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Bin-Mohsin, Bandar, Saba, Mahreen, Javed, Muhammad Zakria, Awan, Muhammad Uzair, Budak, Hüseyin, and Nonlaopon, Kamsing
- Subjects
CALCULUS ,DIFFERENTIAL calculus ,CONVEX functions ,DIFFERENTIABLE functions - Abstract
In this paper, we derive some new quantum estimates of generalized Hermite–Hadamard–Jensen–Mercer type of inequalities, essentially using q-differentiable convex functions. With the help of numerical examples, we check the validity of the results. We also discuss some special cases which show that our results are quite unifying. To show the efficiency of our main results, we offer some interesting applications to special means. [ABSTRACT FROM AUTHOR]
- Published
- 2022
- Full Text
- View/download PDF
39. Refinement Mappings Related to Hermite-Hadamard Type Inequalities for GA-Convex Function.
- Author
-
Latif, Muhammad Amer, Kalsoom, Humaira, Khan, Zareen A., and Al-moneef, Areej A.
- Subjects
INTEGRAL inequalities ,REAL numbers ,JENSEN'S inequality - Abstract
In this paper, we present some new refinement mappings associated with the Hermite–Hadamard type inequalities that are constructed for GA-convex mappings. Our investigation of the mappings leads to the discovery of several interesting features as well as the development of some inequalities for the Hermite–Hadamard type inequalities, which have already been established for GA-convex functions, as well as refining the relationship between the middle, rightmost, and leftmost elements of the function. Some applications to special means of positive real numbers are also given. [ABSTRACT FROM AUTHOR]
- Published
- 2022
- Full Text
- View/download PDF
40. Applications of Confluent Hypergeometric Function in Strong Superordination Theory.
- Author
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Oros, Georgia Irina, Oros, Gheorghe, and Rus, Ancuța Maria
- Subjects
HYPERGEOMETRIC functions ,ANALYTIC functions ,INTEGRAL operators ,STAR-like functions ,CONVEX functions - Abstract
In the research presented in this paper, confluent hypergeometric function is embedded in the theory of strong differential superordinations. In order to proceed with the study, the form of the confluent hypergeometric function is adapted taking into consideration certain classes of analytic functions depending on an extra parameter previously introduced related to the theory of strong differential subordination and superordination. Operators previously defined using confluent hypergeometric function, namely Kummer–Bernardi and Kummer–Libera integral operators, are also adapted to those classes and strong differential superordinations are obtained for which they are the best subordinants. Similar results are obtained regarding the derivatives of the operators. The examples presented at the end of the study are proof of the applicability of the original results. [ABSTRACT FROM AUTHOR]
- Published
- 2022
- Full Text
- View/download PDF
41. New Simpson's Type Estimates for Two Newly Defined Quantum Integrals.
- Author
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Raees, Muhammad, Anwar, Matloob, Vivas-Cortez, Miguel, Kashuri, Artion, Samraiz, Muhammad, and Rahman, Gauhar
- Subjects
INTEGRALS ,CONVEX functions - Abstract
In this paper, we give some correct quantum type Simpson's inequalities via the application of q-Hölder's inequality. The inequalities of this study are compatible with famous Simpson's 1 / 8 and 3 / 8 quadrature rules for four and six panels, respectively. Several special cases from our results are discussed in detail. A counter example is presented to explain the limitation of Hölder's inequality in the quantum framework. [ABSTRACT FROM AUTHOR]
- Published
- 2022
- Full Text
- View/download PDF
42. On Certain Differential Subordination of Harmonic Mean Related to a Linear Function.
- Author
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Dobosz, Anna, Jastrzębski, Piotr, and Lecko, Adam
- Subjects
ARITHMETIC mean ,GENERALIZATION - Abstract
In this paper we study a certain differential subordination related to the harmonic mean and its symmetry properties, in the case where a dominant is a linear function. In addition to the known general results for the differential subordinations of the harmonic mean in which the dominant was any convex function, one can study such differential subordinations for the selected convex function. In this case, a reasonable and difficult issue is to look for the best dominant or one that is close to it. This paper is devoted to this issue, in which the dominant is a linear function, and the differential subordination of the harmonic mean is a generalization of the Briot–Bouquet differential subordination. [ABSTRACT FROM AUTHOR]
- Published
- 2021
- Full Text
- View/download PDF
43. New Estimations of Hermite–Hadamard Type Integral Inequalities for Special Functions.
- Author
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Ahmad, Hijaz, Tariq, Muhammad, Sahoo, Soubhagya Kumar, Baili, Jamel, and Cesarano, Clemente
- Subjects
INTEGRAL inequalities ,HERMITE polynomials ,SPECIAL functions ,MATHEMATICAL analysis ,MATHEMATICAL inequalities - Abstract
In this paper, we propose some generalized integral inequalities of the Raina type depicting the Mittag–Leffler function. We introduce and explore the idea of generalized s-type convex function of Raina type. Based on this, we discuss its algebraic properties and establish the novel version of Hermite–Hadamard inequality. Furthermore, to improve our results, we explore two new equalities, and employing these we present some refinements of the Hermite–Hadamard-type inequality. A few remarkable cases are discussed, which can be seen as valuable applications. Applications of some of our presented results to special means are given as well. An endeavor is made to introduce an almost thorough rundown of references concerning the Mittag–Leffler functions and the Raina functions to make the readers acquainted with the current pattern of emerging research in various fields including Mittag–Leffler and Raina type functions. Results established in this paper can be viewed as a significant improvement of previously known results. [ABSTRACT FROM AUTHOR]
- Published
- 2021
- Full Text
- View/download PDF
44. Strong Differential Superordination Results Involving Extended Sălăgean and Ruscheweyh Operators.
- Author
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Alb Lupaş, Alina and Oros, Georgia Irina
- Subjects
HOLOMORPHIC functions ,CONVEX functions ,DIFFERENTIAL operators ,ANALYTIC functions - Abstract
The notion of strong differential subordination was introduced in 1994 and the theory related to it was developed in 2009. The dual notion of strong differential superordination was also introduced in 2009. In a paper published in 2012, the notion of strong differential subordination was given a new approach by defining new classes of analytic functions on U × U ¯ having as coefficients holomorphic functions in U ¯ . Using those new classes, extended Sălăgean and Ruscheweyh operators were introduced and a new extended operator was defined as L α m : A n ζ * → A n ζ * , L α m f (z , ζ) = (1 − α) R m f (z , ζ) + α S m f (z , ζ) , z ∈ U , ζ ∈ U ¯ , where R m f (z , ζ) is the extended Ruscheweyh derivative, S m f (z , ζ) is the extended Sălăgean operator and A n ζ * = { f ∈ H (U × U ¯) , f (z , ζ) = z + a n + 1 ζ z n + 1 + ⋯ , z ∈ U , ζ ∈ U ¯ }. This operator was previously studied using the new approach on strong differential subordinations. In the present paper, the operator is studied by applying means of strong differential superordination theory using the same new classes of analytic functions on U × U ¯. Several strong differential superordinations concerning the operator L α m are established and the best subordinant is given for each strong differential superordination. [ABSTRACT FROM AUTHOR]
- Published
- 2021
- Full Text
- View/download PDF
45. New Applications of Sălăgean and Ruscheweyh Operators for Obtaining Fuzzy Differential Subordinations.
- Author
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Lupaş, Alina Alb and Oros, Georgia Irina
- Subjects
GEOMETRIC function theory ,DIFFERENTIAL operators ,ANALYTIC functions ,FUZZY sets ,OPERATOR functions ,STAR-like functions ,HOLOMORPHIC functions - Abstract
The present paper deals with notions from the field of complex analysis which have been adapted to fuzzy sets theory, namely, the part dealing with geometric function theory. Several fuzzy differential subordinations are established regarding the operator L α m , given by L α m : A n → A n , L α m f (z) = (1 − α) R m f (z) + α S m f (z) , where A n = { f ∈ H (U) , f (z) = z + a n + 1 z n + 1 + ... , z ∈ U } is the subclass of normalized holomorphic functions and the operators R m f (z) and S m f (z) are Ruscheweyh and Sălăgean differential operator, respectively. Using the operator L α m , a certain fuzzy class of analytic functions denoted by S L F m δ , α is defined in the open unit disc. Interesting results related to this class are obtained using the concept of fuzzy differential subordination. Examples are also given for pointing out applications of the theoretical results contained in the original theorems and corollaries. [ABSTRACT FROM AUTHOR]
- Published
- 2021
- Full Text
- View/download PDF
46. Applications of Fuzzy Differential Subordination to the Subclass of Analytic Functions Involving Riemann–Liouville Fractional Integral Operator.
- Author
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Breaz, Daniel, Khan, Shahid, Tawfiq, Ferdous M. O., and Tchier, Fairouz
- Subjects
FRACTIONAL integrals ,GEOMETRIC function theory ,INTEGRAL operators ,DIFFERENTIAL operators ,ANALYTIC functions ,UNIVALENT functions ,MERGERS & acquisitions ,FUZZY sets - Abstract
In this research, we combine ideas from geometric function theory and fuzzy set theory. We define a new operator D τ − λ L α , ζ m : A → A of analytic functions in the open unit disc Δ with the help of the Riemann–Liouville fractional integral operator, the linear combination of the Noor integral operator, and the generalized Sălăgean differential operator. Further, we use this newly defined operator D τ − λ L α , ζ m together with a fuzzy set, and we next define a new class of analytic functions denoted by R ϝ ζ (m , α , δ). Several innovative results are found using the concept of fuzzy differential subordination for the functions belonging to this newly defined class, R ϝ ζ (m , α , δ). The study includes examples that demonstrate the application of the fundamental theorems and corollaries. [ABSTRACT FROM AUTHOR]
- Published
- 2023
- Full Text
- View/download PDF
47. Fractional Hermite–Hadamard-Type Inequalities for Differentiable Preinvex Mappings and Applications to Modified Bessel and q-Digamma Functions.
- Author
-
Tariq, Muhammad, Ahmad, Hijaz, Shaikh, Asif Ali, Ntouyas, Sotiris K., Hınçal, Evren, and Qureshi, Sania
- Subjects
BESSEL functions ,FRACTIONAL calculus ,RESEARCH personnel ,MATHEMATICS ,CONVEX functions ,DIFFERENTIABLE dynamical systems - Abstract
The theory of convexity pertaining to fractional calculus is a well-established concept that has attracted significant attention in mathematics and various scientific disciplines for over a century. In the realm of applied mathematics, convexity, particularly in relation to fractional analysis, finds extensive and remarkable applications. In this manuscript, we establish new fractional identities. Employing these identities, some extensions of the fractional H-H type inequality via generalized preinvexities are explored. Finally, we discuss some applications to the q-digamma and Bessel functions via the established results. We believe that the methodologies and approaches presented in this work will intrigue and spark the researcher's interest even more. [ABSTRACT FROM AUTHOR]
- Published
- 2023
- Full Text
- View/download PDF
48. Applications of Inequalities in the Complex Plane Associated with Confluent Hypergeometric Function.
- Author
-
Oros, Georgia Irina and Lupas, Alina Alb
- Subjects
UNIVALENT functions ,ANALYTIC functions ,EQUALITY ,CONVEX functions ,HYPERGEOMETRIC functions - Abstract
The idea of inequality has been extended from the real plane to the complex plane through the notion of subordination introduced by Professors Miller and Mocanu in two papers published in 1978 and 1981. With this notion came a whole new theory called the theory of differential subordination or admissible functions theory. Later, in 2003, a particular form of inequality in the complex plane was also defined by them as dual notion for subordination, the notion of differential superordination and with it, the theory of differential superordination appeared. In this paper, the theory of differential superordination is applied to confluent hypergeometric function. Hypergeometric functions are intensely studied nowadays, the interest on the applications of those functions in complex analysis being renewed by their use in the proof of Bieberbach's conjecture given by de Branges in 1985. Using the theory of differential superodination, best subordinants of certain differential superordinations involving confluent (Kummer) hypergeometric function are stated in the theorems and relation with previously obtained results are highlighted in corollaries using particular functions and in a sandwich-type theorem. An example is also enclosed in order to show how the theoretical findings can be applied. [ABSTRACT FROM AUTHOR]
- Published
- 2021
- Full Text
- View/download PDF
49. New Conditions for Univalence of Confluent Hypergeometric Function.
- Author
-
Oros, Georgia Irina
- Subjects
UNIVALENT functions ,HYPERGEOMETRIC functions ,COMPLEX numbers ,STAR-like functions ,ANALYTIC functions ,CONVEX functions - Abstract
Since in many particular cases checking directly the conditions from the definitions of starlikeness or convexity of a function can be difficult, in this paper we use the theory of differential subordination and in particular the method of admissible functions in order to determine conditions of starlikeness and convexity for the confluent (Kummer) hypergeometric function of the first kind. Having in mind the results obtained by Miller and Mocanu in 1990 who used a , c ∈ R , for the confluent (Kummer) hypergeometric function, in this investigation a and c complex numbers are used and two criteria for univalence of the investigated function are stated. An example is also included in order to show the relevance of the original results of the paper. [ABSTRACT FROM AUTHOR]
- Published
- 2021
- Full Text
- View/download PDF
50. New Estimations for Shannon and Zipf–Mandelbrot Entropies.
- Author
-
Adil Khan, Muhammad, Al-sahwi, Zaid Mohammad, and Chu, Yu-Ming
- Subjects
ZIPF'S law ,MANDELBROT sets ,ENTROPY (Information theory) ,CONVEX functions ,JENSEN'S inequality - Abstract
The main purpose of this paper is to find new estimations for the Shannon and Zipf–Mandelbrot entropies. We apply some refinements of the Jensen inequality to obtain different bounds for these entropies. Initially, we use a precise convex function in the refinement of the Jensen inequality and then tamper the weight and domain of the function to obtain general bounds for the Shannon entropy (
SE ). As particular cases of these general bounds, we derive some bounds for the Shannon entropy (SE ) which are, in fact, the applications of some other well-known refinements of the Jensen inequality. Finally, we derive different estimations for the Zipf–Mandelbrot entropy (ZME ) by using the new bounds of the Shannon entropy for the Zipf–Mandelbrot law (ZML ). We also discuss particular cases and the bounds related to two different parametrics of the Zipf–Mandelbrot entropy. At the end of the paper we give some applications in linguistics. [ABSTRACT FROM AUTHOR]- Published
- 2018
- Full Text
- View/download PDF
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