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Jurnal

Journal of Function Spaces

Scopus

ISSN 2314-8896 · Wiley · 2.226 artikel di indeks

  1. Artikel Jurnal

    On Subclasses of Spiral-Like Functions Defined by the q-Derivative Operator

    Fatma Z. El-Emam; Samar. M. Madian

    Journal of Function Spaces, Vol. 2026 · 2026 · Inggris · DOAJ Scopus

    In 1990, Ismail et al. introduced a generalized class of starlike functions using the q-derivative operator. Similarly, many authors have studied various subclasses of analytic functions involving the q-derivative operator from different perspectives. This paper is aimed at presenting new…

  2. Artikel Jurnal

    On Hadamard and Fejér–Hadamard Inequalities for Fractional Integrals Involving Mittag-Leffler-Type Function of Arbitrary Order

    Maged Bin-Saad; Jihad Younis; Maryam Salem Alatawi dkk.

    Journal of Function Spaces, Vol. 2026 · 2026 · Inggris · DOAJ Scopus

    This paper introduces and investigates novel fractional integral operators featuring the extended Mittag-Leffler function in the kernel. After establishing the core properties of these operators, we derive the corresponding Hadamard and Fejér–Hadamard inequalities. The established inequalities are…

  3. Artikel Jurnal

    Study of p,q-Symmetric Starlike Functions of Order η

    Imran Khan; Rashid Murtaza; null Adnan dkk.

    Journal of Function Spaces, Vol. 2026 · 2026 · Inggris · DOAJ Scopus

    In the field of geometric function theory, we use the p,q-differential operator in the complex unit disk to describe a novel class Sp,q∗∗η of symmetrical starlike functions of order η. Several interesting properties of functions belonging to the class Sp,q∗∗η are examined, such as growth…

  4. Artikel Jurnal

    Triple Solutions for Nonlinear μ1·,μ2·—Laplacian–Schrödinger–Kirchhoff Type Equations

    Ahmed AHMED; Moussa Ahmed Salem ATIGH; Mohamed Saad Bouh ELEMINE VALL

    Journal of Function Spaces, Vol. 2026 · 2026 · Inggris · DOAJ Scopus

    In this manuscript, we study a μ1·,μ2·—Laplacian–Schrödinger–Kirchhoff equation involving a continuous positive potential that satisfies del Pino–Felmer type conditions: K1∫ℝN1/μ1z∇ψμ1z dz+∫ℝN1/μ1zVzψμ1z dz−Δμ1·ψ+Vzψμ1z−2ψ+K2∫ℝN1/μ2z∇ψμ2z dz+∫ℝN1/μ2zVzψμ2z dz−Δμ2·ψ+Vzψμ2z−2ψ=ξ1θ1z,ψ+ξ2θ2z,ψ inℝN…

  5. Artikel Jurnal

    A Note on Multidimensional Sumudu-Generalized Laplace Decomposition Method and Singular Pseudo-Hyperbolic Equations

    Hassan Eltayeb; Said Mesloub

    Journal of Function Spaces, Vol. 2026 · 2026 · Inggris · DOAJ Scopus

    The objective of this research is to establish an effective methodology for addressing specific linear, nonlinear, singular n+1-dimensional fractional pseudo-hyperbolic equations via the use of the multi-Sumudu and generalized Laplace transforms combined with the decomposition method. This…

  6. Artikel Jurnal

    Random Gel'fand Approximation Between Anisotropic Spaces and Function Spaces With Mixed Smoothness

    Bo Feng; Jiayi Qiu; Guanggui Chen dkk.

    Journal of Function Spaces, Vol. 2026 · 2026 · Inggris · DOAJ Scopus

    This paper investigates the complexity associated with function approximation between anisotropic spaces and spaces of mixed smoothness within the framework of adaptive Monte Carlo methods. Specifically, we analyze the information complexity for approximating function classes of mixed smoothness…

  7. Artikel Jurnal

    Riemann–Liouville Fractional Calculus of Nonlinear Hidden Variable Recurrent Fractal Interpolation Functions Based on Rakotch Contraction

    Chung-Il Ro; Chol-Hui Yun; Song-Chol Kwon dkk.

    Journal of Function Spaces, Vol. 2026 · 2026 · Inggris · DOAJ Scopus

    In this paper, we study Riemann–Liouville fractional calculus of nonlinear hidden variable recurrent fractal interpolation function (HVRFIF) constructed based on Rakotch contraction, which is a generalization of Banach contraction. First, we prove that Riemann–Liouville fractional integral and…

  8. Artikel Jurnal

    On a Numerical Cauchy Problem for a Singular Two-Dimensional Fourth-Order Fractional Partial Differential Equation

    Said Mesloub; Hassan Eltayeb Gadain

    Journal of Function Spaces, Vol. 2026 · 2026 · Inggris · DOAJ Scopus

    In this paper, we study a numerical Cauchy problem associated with a singular two-dimensional fourth-order partial differential equation that includes a Caputo time-fractional derivative of order 0

  9. Artikel Jurnal

    Uniqueness Results for Positive Solutions of Ψ–Caputo Fractional Differential Equations

    Hasan Rasouli

    Journal of Function Spaces, Vol. 2026 · 2026 · Inggris · DOAJ Scopus

    This paper establishes rigorous existence and uniqueness results for positive solutions of boundary value problems involving the Ψ–Caputo fractional operator. The equations combine continuous nonlinear terms with Riemann–Liouville fractional integrals and are subject to newly formulated integral…

  10. Artikel Jurnal

    Existence and Approximate Solutions for Nonlinear Systems of Tripled-Variable Fractional Singular Volterra Integral Equations Under Measure of Noncompactness

    Hasanen A. Hammad; Maryam G. Alshehri

    Journal of Function Spaces, Vol. 2026 · 2026 · Inggris · DOAJ Scopus

    This work introduces an innovative analytical framework for studying finite systems of nonlinear tripled-variable fractional singular Volterra integral equations in the Banach space. The investigation combines the technique of measures of noncompactness with fixed point theorem to establish new…

  11. Artikel Jurnal

    Milne-Type Inequalities in the Context of Conformable Fractional Multiplicative Integrals

    İrem Çay; Hüseyin Budak; İrem Bağlan

    Journal of Function Spaces, Vol. 2026 · 2026 · Inggris · DOAJ Scopus

    This paper examines Milne inequalities in the setting of conformal fractional multiplicative integrals, which represent a modern extension of traditional fractional calculus. Drawing on advances in multiplicative analysis and non-Newtonian calculus, we establish a new integral identity that forms…

  12. Artikel Jurnal

    Major Remark on Unique Fixed-Point Theorems via Interpolative and Rational Contractions in Super Metric Spaces and A New Approach to the Interpolative Contractions

    Arsalan Hojjat Ansari; A. M. Nazari; Seyyed Hossein Jafari Petroudi

    Journal of Function Spaces, Vol. 2026 · 2026 · Inggris · DOAJ Scopus

    This paper presents a critical analysis of several recent fixed-point results involving interpolative and rational contractions in super metric spaces and related frameworks. We first show that certain claimed fixed-point theorems, including a result concerning ρ,λ-interpolative Kannan…

  13. Artikel Jurnal

    Analysis of Bifurcation, Chaos, and Multiplicative White Noise Intensity of the Stochastic Fractional Nonlinear mCGL Model in an Optical Communication System

    Hala Abd-Elmageed; Md. Mamunur Roshid; Shaimaa A. A. Ahmed dkk.

    Journal of Function Spaces, Vol. 2026 · 2026 · Inggris · DOAJ Scopus

    This manuscript studies the stochastic time fraction modified complex Ginzburg–Landau (SFmCGL) model, an essential dynamical nonlinear model for describing the physical nature of how the optical wave soliton behaves and changes over time in a dynamic optical communication system. This study focuses…

  14. Artikel Jurnal

    Polynomial Fuzzy Contractions With Applications to SEIRV Epidemic Models

    Maha Noorwali; Mohammed Shehu Shagari

    Journal of Function Spaces, Vol. 2026 · 2026 · Inggris · DOAJ Scopus

    In this study, a new family of polynomial-type fuzzy contractions defined on metric spaces is introduced. Under filtered assumptions, it is demonstrated that such non-crisp set-valued operators possess some fixed points. Because of the higher-order terms polynomial nature of the contractions, a few…

  15. Artikel Jurnal

    Best Proximity Point Results in Graphical Metric Space and Application

    Sadia Farooq; Naeem Saleem

    Journal of Function Spaces, Vol. 2026 · 2026 · Inggris · DOAJ Scopus

    This article introduces and investigates the notion of Ψ,K-quasi graphical proximal contraction mappings within the framework of graphical metric spaces. We establish several best proximity point theorems for such mappings under appropriate structural and completeness assumptions. The obtained…

  16. Artikel Jurnal

    Ergodic Properties of Generalized Integral Operators on Disk Algebra

    Amir H. Sanatpour; Amir Salehi

    Journal of Function Spaces, Vol. 2026 · 2026 · Inggris · DOAJ Scopus

    In this paper, we study ergodic properties of generalized integral operators on the disk algebra. In particular, we introduce the concept of co-mean ergodicity and we derive sufficient and also necessary conditions for these operators to be (co-)mean ergodic on the disk algebra.

  17. Artikel Jurnal

    Wavelets-Associated Approximation to the Family of New Class of q-Szász Operators Via q-Analog

    Md. Nasiruzzaman; Amel Souhail; Adel Alatawi dkk.

    Journal of Function Spaces, Vol. 2026 · 2026 · Inggris · DOAJ Scopus

    MSC2020 Classification: Primary 41A25, 41A36; Secondary 33C45.

  18. Artikel Jurnal

    Convergence of Picard–CR Iterative Algorithm and Applications

    Suheyla Elmas

    Journal of Function Spaces, Vol. 2026 · 2026 · Inggris · DOAJ Scopus

    In applied mathematics, graph theory (GT) is a notably compelling area of study. In the last 50 years, the number of mathematicians making contributions to research in this field has consistently increased. This rising interest is mainly a result of the significant real-world applications it…

  19. Artikel Jurnal

    Exact and Approximate Controllability for Backward Fractional Integro-Differential Equations With History-Dependent Operators

    Ghadah Albeladi; Hasanen A. Hammad

    Journal of Function Spaces, Vol. 2026 · 2026 · Inggris · DOAJ Scopus

    This paper is devoted to the analysis of controllability for a class of backward fractional integro-differential equations involving history-dependent operators, which arise naturally in systems with memory effects. The study begins with the formulation of an appropriate functional framework…

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