Fixed Point Results in Orthogonal Neutrosophic Metric Spaces. - Umar Ishtiaq; Khalil Javed; Fahim Uddin; Manuel de la Sen; Khalil Ahmed; Muhammad Usman Ali (Complex., 2021)

Reich-Type and (α, F)-Contractions in Partially Ordered Double-Controlled Metric-Type Spaces with Applications to Non-Linear Fractional Differential Equations and Monotonic Iterative Method. - Muhammad Farhan; Umar Ishtiaq; Muhammad Haris Saeed; Aftab Hussain 004; Hamed Al Sulami (Axioms, 2022)

Solving Fractional Volterra-Fredholm Integro-Differential Equations via A** Iteration Method. - Austine Efut Ofem; Aftab Hussain 004; Oboyi Joseph; Mfon Okon Udo; Umar Ishtiaq; Hamed Al Sulami; Chukwuka Fernando Chikwe (Axioms, 2022)

A Theoretical Development of Cubic Pythagorean Fuzzy Soft Set with Its Application in Multi-Attribute Decision Making. - Muhammad Saeed; Muhammad Haris Saeed; Rimsha Shafaqat; Salvatore Sessa 002; Umar Ishtiaq; Ferdinando Di Martino (Symmetry, 2022)

Strong Convergence Theorems for a Finite Family of Enriched Strictly Pseudocontractive Mappings and ΦT-Enriched Lipschitizian Mappings Using a New Modified Mixed-Type Ishikawa Iteration Scheme with Error. - Naeem Saleem; Imo Kalu Agwu; Umar Ishtiaq; Stojan Radenovic (Symmetry, 2022)

A New Extension to the Intuitionistic Fuzzy Metric-like Spaces. - Fahim Uddin; Umar Ishtiaq; Khalil Javed; Suhad Subhi Aiadi; Muhammad Arshad 003; Nizar Souayah; Nabil Mlaiki (Symmetry, 2022)

Approximating Common Solution of Minimization Problems Involving Asymptotically Quasi-Nonexpansive Multivalued Mappings. - Min Wang; Umar Ishtiaq; Naeem Saleem; Imo Kalu Agwu (Symmetry, 2022)

Graphical Views of Intuitionistic Fuzzy Double-Controlled Metric-Like Spaces and Certain Fixed-Point Results with Application. - Umar Ishtiaq; Naeem Saleem; Fahim Uddin; Salvatore Sessa 002; Khaleel Ahmad; Ferdinando Di Martino (Symmetry, 2022)

Extension of a Unique Solution in Generalized Neutrosophic Cone Metric Spaces. - Umar Ishtiaq; Muhammad Asif; Aftab Hussain 004; Khaleel Ahmad; Iqra Saleem; Hamed Al Sulami (Symmetry, 2023)

Development of Fixed Point Results for αΓ-F-Fuzzy Contraction Mappings with Applications. - Salvatore Sessa 002; Fahad Jahangeer; Doha A. Kattan; Umar Ishtiaq (Symmetry, 2023)

On Orthogonal Fuzzy Interpolative Contractions with Applications to Volterra Type Integral Equations and Fractional Differential Equations. - Umar Ishtiaq; Fahad Jahangeer; Doha A. Kattan; Ioannis K. Argyros; Samundra Regmi (Axioms, 2023)

Generalized Common Best Proximity Point Results in Fuzzy Metric Spaces with Application. - Umar Ishtiaq; Fahad Jahangeer; Doha A. Kattan; Ioannis K. Argyros (Symmetry, 2023)

Common Fixed Point Results on a Double-Controlled Metric Space for Generalized Rational-Type Contractions with Application. - Khaleel Ahmad; Ghulam Murtaza; Salha Alshaikey; Umar Ishtiaq; Ioannis K. Argyros (Axioms, 2023)

Fixed Point Theorems in Orthogonal Intuitionistic Fuzzy b-metric Spaces with an Application to Fredholm Integral Equation. - Fahim Uddin; Muhammad Haris Saeed; Khaleel Ahmad; Umar Ishtiaq; Salvatore Sessa 002 (Trans. Fuzzy Sets Syst., 2024)

Strong and Weak Convergence Theorems for the Split Feasibility Problem of (β,k)-Enriched Strict Pseudocontractive Mappings with an Application in Hilbert Spaces. - Asima Razzaque; Naeem Saleem; Imo Kalu Agwu; Umar Ishtiaq; Maggie Aphane (Symmetry, 2024)

Fixed-Point Results of Generalized (ϕ,Ψ)-Contractive Mappings in Partially Ordered Controlled Metric Spaces with an Application to a System of Integral Equations. - Mohammad Akram; Salha Alshaikey; Umar Ishtiaq; Muhammad Farhan; Ioannis K. Argyros; Samundra Regmi (Axioms, 2024)

Enriched Z-Contractions and Fixed-Point Results with Applications to IFS. - Ibrahim Alraddadi; Muhammad Din; Umar Ishtiaq; Mohammad Akram; Ioannis K. Argyros (Axioms, 2024)

Some Generalized Neutrosophic Metric Spaces and Fixed Point Results with Applications. - Mohammad Akram; Umar Ishtiaq; Khaleel Ahmad; Tania A. Lazar; Vasile L. Lazar; Liliana Guran (Symmetry, 2024)

Aczel-Alsina aggregation operators for linear diophantine fuzzy set and their application to multiple-attribute decision making problems. - Muhammad Asif; Aurang Zeb; Umar Ishtiaq; Waseem Ahmad; Muzhou Hou (Expert Syst. Appl., 2025)

Solution of an integral equation in controlled rectangular metric spaces via weakly contractive mappings. - Doha A. Kattan; Umar Ishtiaq; Muhammad Farhan; Ioannis K. Argyros; Mohammad Akram; Samundra Regmi (J. Comput. Appl. Math., 2025)

Aczel-Alsina Aggregation Operators for Pythagorean Fuzzy Linear Diophantine Set and Application to Multiple-Attribute Decision-Making Problem Related to Medical Diagnosis. - Muhammad Asif; Umar Ishtiaq; Aurang Zeb; Waseem Ahmad; Muzhou Hou (Int. J. Fuzzy Syst., 2025)