Birkhoff-Kellogg theorems on invariant directions for multimaps by Ravi P. Agarwal, Donal O'Regan

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Stochastic Permanence, Stationary Distribution and Extinction of a Single-Species Nonlinear Diffusion System with Random Perturbation by Li Zu, Daqing Jiang, Donal O’Regan

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Positive solutions for a Hadamard-type fractional-order three-point boundary value problem on the half-line by Jiafa Xu, Yujun Cui, Donal O’Regan

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Solvability of a Riemann–Liouville-Type Fractional-Impulsive Differential Equation with a Riemann–Stieltjes Integral Boundary Condition by Keyu Zhang, Donal O’Regan, Jiafa Xu

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Representation Formulas and Stability Analysis for Hilfer–Hadamard Proportional Fractional Differential Equations by Safoura Rezaei Aderyani, Reza Saadati, Donal O’Regan

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Two-Parameter Regularization Method for a Nonlinear Backward Heat Problem with a Conformable Derivative by Vu Ho, Donal O’Regan, Hoa Ngo Van

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Existence of sunny nonexpansive retractions and approximation of fixed points of a representation of nonexpansive mappings by Ebrahim Soori, Ravi P. Agarwal, Donal O'Regan

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Krasnosel’skii Type Fixed Point Theorems for Mappings on Nonconvex Sets by Maryam A. Alghamdi, Donal O'Regan, Naseer Shahzad

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The Strict Stability of Impulsive Differential Equations with a Caputo Fractional Derivative with Respect to Other Functions by Ravi P. Agarwal, Snezhana Hristova, Donal O’Regan

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Strict Stability of Fractional Differential Equations with a Caputo Fractional Derivative with Respect to Another Function by Ravi P. Agarwal, Snezhana Hristova, Donal O’Regan

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Ulam stability for nonlinear boundary value problems for impulsive Caputo type fractional delay differential equations by Ravi P. Agarwal, Snezhana Hristova, Donal O’Regan

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Geodesic B-Preinvex Functions and Multiobjective Optimization Problems on Riemannian Manifolds by Sheng-lan Chen, Nan-Jing Huang, Donal O'Regan

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Fixed point theory in RWC–Banach algebras by Józef Banaś, Bilel Krichen, Bilel Mefteh, Donal O’Regan

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A Furi-Pera theorem in Hausdorff topological spaces for acyclic maps by Ravi P. Agarwal, Jewgeni H. Dshalalow, Donal O'Regan

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Two Positive Solutions for Elliptic Differential Inclusions by Gabriele Bonanno, Valeria Morabito, Donal O’Regan, Bruno Vassallo

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Generalized Well-Posedness for Symmetric Vector Quasi-Equilibrium Problems by Wei-bing Zhang, Nan-jing Huang, Donal O’Regan

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Extremal Solutions for a Caputo-Type Fractional-Order Initial Value Problem by Keyu Zhang, Tian Wang, Donal O’Regan, Jiafa Xu

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Fixed point theory for Mönch-type maps defined on closed subsets of Fréchet spaces: the projective limit approach by Ravi P. Agarwal, Jewgeni H. Dshalalow, Donal O'Regan

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Positive solutions for a Hadamard-type fractional p-Laplacian integral boundary value problem by Yihui Xu, Feng Wang, Donal O'Regan, Jiafa Xu

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Existence of Solutions for a Periodic Boundary ValueProblem with Impulse and Fractional Derivative Dependence by Yaohong Li, Yongqing Wang, Donal O’Regan, Jiafa Xu

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