Dr. Paul Augustine Ejegwa

Scopus Publications

Novel Q-Rung orthopair fuzzy correlation measure based on spearman’s correlation scheme with application in vehicle selection problem
Paul Augustine Ejegwa, Wanzenke Tidoo Daniel, Nasreen Kausar, Nezir Aydin
Beni Suef University Journal of Basic and Applied Sciences, 2026
Background Q-rung orthopair fuzzy sets (Q-ROFS) have been widely employed in decision-making problems due to their strong ability to handle uncertainty, indecision, and imprecision. Consequently, several q-rung orthopair fuzzy correlation measures (Q-ROFCM) have been developed and applied in various decision-making contexts. However, many existing correlation measures exhibit inherent limitations, which reduce their effectiveness in addressing practical, real-world problems. Methods In this study, a novel q-rung orthopair fuzzy correlation coefficient (Q-ROFCC) based on Spearman’s correlation scheme is proposed to overcome the shortcomings of existing approaches. The fundamental mathematical properties of the proposed correlation measure are rigorously analyzed to ensure compliance with the standard axioms of correlation coefficients. Furthermore, the proposed method is incorporated into a multi-attribute decision-making (MADM) framework. Results The results demonstrate that the proposed Spearman-based Q-ROFCM technique is reliable, effective, and accurate when compared with existing methods. Its applicability is illustrated through a vehicle selection problem, where the most suitable alternative is identified based on optimal performance and user satisfaction. Comparative analysis confirms the superiority of the proposed approach over Pearson-based Q-ROFCM approaches. Conclusions The proposed Q-ROFCM technique provides a robust and efficient alternative for solving MADM problems under uncertainty. Owing to its improved performance and practical applicability, the method is well suited for real-life decision-making scenarios.
A tendency coefficient–driven Pythagorean fuzzy distance approach for selection problems in higher education and medical waste management
Paul Augustine Ejegwa, Manasseh Terna Anum, Nasreen Kausar, Akbota Nurgaliyeva, Mohammed Abdullah Salman
Scientific Reports, 2026
A Novel Pythagorean Fuzzy Similarity Method for Questionnaire Analysis on the Use of Virtual Library Resources
Transactions on Fuzzy Sets and Systems, 2026
Some New Q-Rung Orthopair Fuzzy Distance Techniques and Their Application to Medical Examination Based on Decision-Making Methods
Tasmimgiri Va Tahqiq Dar Amaliyyat, 2025
A Novel Q-Rung Orthopair Fuzzy Distance Metric for Energy Source Selection
Journal of Applied Research on Industrial Engineering, 2025
On Jordan-Hölder Theorem under Intuitionistic Fuzzy Groups
Paul Augustine Ejegwa, Nasreen Kausar, Tonguc Cagin
European Journal of Pure and Applied Mathematics, 2025
The theory of intuitionistic fuzzy groups is an algebraic structure derivable from the utilization of groups in intuitionistic fuzzy sets. Many notions in group theory have been presented in intuitionistic fuzzy group theory. However, concepts like simple group, maximal normal subgroup, normal series, composition series, and the Jordan-Hölder Theorem are open problems in intuitionistic fuzzy group theory. Hence, this paper defines simple intuitionistic fuzzy groups, maximal normal intuitionistic fuzzy subgroups, normal series for intuitionistic fuzzy groups, and composition series for intuitionistic fuzzy groups with illustrations. In addition, the Jordan-Hölder Theorem in intuitionistic fuzzy group theory is verified. It is shown that every intuitionistic fuzzy group of a finite group possesses a composition series, and any two composition series for an intuitionistic fuzzy group of a finite group are equivalent.
Jordan-Hölder Theorem for Multigroups
Paul Augustine Ejegwa, Nasreen Kausar, Musa Adeku Ibrahim, Tonguc Cagin
European Journal of Pure and Applied Mathematics, 2025
Multigroup theory is the application of multisets to the theory of groups. Many group’s theoretic notions have been studied in multigroup theory, however, the ideas of maximal normal subgroup, simple group, normal series, composition series, and the Jordan-Hölder Theorem are yet to be investigated in multiset context. In this article, we define simple multigroup, maximalnormal submultigroup, normal series for multigroup, and composition series for multigroup with examples. With these concepts, we establish the Jordan-Hölder Theorem in multigroup theory. It is shown that every finite multigroup defined over a finite group has a composition series. In addition, it is established that every finite multigroup defined over a finite group has at least two composition series which are equivalent.
Recognition Principle for Course Allocations in Higher Institutions based on Intuitionistic Fuzzy Correlation Coefficient
Journal of Fuzzy Extension and Applications, 2025
Some New Techniques of Computing Correlation Coefficient between q-Rung Orthopair Fuzzy Sets and their Applications in Multi-Criteria Decision-Making
Paul Augustine Ejegwa, Arun Sarkar, Idoko Charles Onyeke
Gazi University Journal of Science, 2025
The term q-rung orthopair fuzzy set is an essential variant of fuzzy set with the capacity of tackling fuzziness and imprecision in the decision-making process. A fundamental concept in the decision-making process is the idea of correlation coefficient because of its wide applications. The process of decision-making is complex due to imprecisions, and as such the idea of correlation coefficient has been investigated under q-rung orthopair fuzzy setting. Some authors have constructed some techniques of correlation coefficient under q-rung orthopair fuzzy sets with practical applications. However, these existing techniques are defectives with several drawbacks in terms of precision and alignment with the conditions of correlation coefficient. In this work, two new techniques for estimating correlation coefficient under q-rung orthopair fuzzy sets are presented and theoretically discussed. Moreover, we apply the new techniques of correlation coefficient under q-rung orthopair fuzzy sets in disease diagnosis and employment process by using simulated q-rung orthopair fuzzy data based on multi-criteria decision-making approach and recognition principle. Some comparative analyses are provided to ascertain the benefits of the new techniques of correlation coefficient under q-rung orthopair fuzzy sets over the obtainable techniques with regard to reliability and performance rating.
A novel Pythagorean fuzzy correlation coefficient based on Spearman's technique of correlation coefficient with applications in supplier selection process
Paul Augustine Ejegwa, Nasreen Kausar, Nezir Aydin, Muhammet Deveci
Journal of Industrial Information Integration, 2025
A Modified Pythagorean Fuzzy Similarity Operator with Application in Questionnaire Analysis
Transactions on Fuzzy Sets and Systems, 2025
On intuitionistic fuzzy characteristic and Frattini subgroups
Paul Augustine Ejegwa, Ahmed Ibrahim Isah
Notes on Intuitionistic Fuzzy Sets, 2025
An enhancement of smartphone selection process based on a new 3D Pythagorean fuzzy distance metric via TOPSIS technique
Chimele Orji Abraham, Paul Augustine Ejegwa, Nasreen Kausar, Abolape Deborah Akwu, Tonguc Cagin
Intelligent Data Analysis, 2025
An Enhance Vehicle Selection Problem for an Effective Transportation System: A Logarithmic-Based Distance Measure Approaches via q-Rung Orthopair Fuzzy Information
Manasseh Terna Anum, Nasreen Kausar, Paul Augustine Ejegwa, Brikena Vrioni, Ervin Hoxha
Contemporary Mathematics Singapore, 2025
A new Fermatean fuzzy Spearman-like correlation coefficient and its application in evaluating insecurity problem via multi-criteria decision-making approach
Paul Augustine Ejegwa, Nasreen Kausar, Nezir Aydin, Yuming Feng, Oludolapo Akanni Olanrewaju
Heliyon, 2024
New Fermatean Fuzzy Distance Metric and Its Utilization in the Assessment of Security Crises Using the MCDM Technique
Paul Augustine Ejegwa, Manasseh Terna Anum, Nasreen Kausar, Chukwudi Obinna Nwokoro, Nezir Aydin, et al.
Mathematics, 2024
A New Method of Distance Measure Between Intuitionistic Fuzzy Sets and its Application in Admission Procedure
Paul Augustine Ejegwa, Manasseh Terna Anum, Kenneth Ifeanyi Isife
Journal of Uncertain Systems, 2024
A robust correlation coefficient for fermatean fuzzy sets based on spearman’s correlation measure with application to clustering and selection process
Paul Augustine Ejegwa, Tidoo Daniel Wanzenke, Innocent Otache Ogwuche, Manasseh Terna Anum, Kenneth Ifeanyi Isife
Journal of Applied Mathematics and Computing, 2024
An Enhanced Pythagorean Fuzzy Distance Method with Application in the Selection of Renewable Energy Source via MCDA
Anum Manasseh Terna, Paul Augustine Ejegwa, Yuming Feng
Proceedings of 2024 International Conference on New Trends in Computational Intelligence Ntci 2024, 2024
New cosine similarity measures for intuitionistic fuzzy sets with application in decision-making
S. Ahemen, R. Ujah, P. A. Ejegwa
Optimization and Computing Using Intelligent Data Driven Approaches for Decision Making Optimization Applications, 2024
Tendency Coefficient-Based Weighted Distance Measure for Intuitionistic Fuzzy Sets with Applications
Manasseh Terna Anum, Hanyin Zhang, Paul Augustine Ejegwa, Yuming Feng
2024 12th International Conference on Intelligent Control and Information Processing Icicip 2024, 2024
Determination of medical emergency via new intuitionistic fuzzy correlation measures based on Spearman’s correlation coefficient
Paul Augustine Ejegwa, Nasreen Kausar, John Abah Agba, Francis Ugwuh, Emre Özbilge, et al.
Aims Mathematics, 2024
A new similarity function for Pythagorean fuzzy sets with application in football analysis
Rongfeng Li, Paul Augustine Ejegwa, Kun Li, Iorshase Agaji, Yuming Feng, et al.
Aims Mathematics, 2024
Generalized Similarity Operator for Intuitionistic Fuzzy Sets and its Applications Based on Recognition Principle and Multiple Criteria Decision Making Technique
Yi Zhou, Paul Augustine Ejegwa, Samuel Ebimobowei Johnny
International Journal of Computational Intelligence Systems, 2023
A hybridized correlation coefficient technique and its application in classification process under intuitionistic fuzzy setting
Iranian Journal of Fuzzy Systems, 2023

RECENT SCHOLAR PUBLICATIONS

A New Numerical Method of q-Rung Orthopair Fuzzy Distance Measure for Robotics Selection Analysis
PA Ejegwa, CO Nwokoro, B Alechenu
Fuzzy Decision-Making Algorithms: Mathematical Optimization, Metaheuristic … , 2026
2026
A Novel Distance Metric Between Fermatean Fuzzy Sets with Application in Vehicle Selection Process Through the TOPSIS
CO Abraham, PA Ejegwa, AD Akwu
Fuzzy Decision-Making Algorithms: Mathematical Optimization, Metaheuristic … , 2026
2026
Systematic Review of the State-of-the-Art Fuzzy Logic Applications in Agriculture: Implications for Smart Agriculture
CO Nwokoro, PA Ejegwa, G Ataguba, R Orji
Fuzzy Decision-Making Algorithms: Mathematical Optimization, Metaheuristic … , 2026
2026
On Soluble Intuitionistic Fuzzy Group and Its Properties
PA Ejegwa, N Kausar, A Smerat, T Cagin
European Journal of Pure and Applied Mathematics 19 (1), 7164-7164 , 2026
2026
Fuzzy Decision-Making Algorithms: Mathematical Optimization, Metaheuristic Optimization, Supply Chain Management
K Kumar, SA Bhat, PA Ejegwa, R Bhardwaj
De Gruyter , 2026
2026
A novel correlation coefficient between single-valued neutrosophic sets and its use in renewable energy source selection
PA Ejegwa, M Kirisci
Neutrosophic Computing and Vague Data Analysis, 24 , 2026
2026
A tendency coefficient–driven Pythagorean fuzzy distance approach for selection problems in higher education and medical waste management
PA Ejegwa, MT Anum, N Kausar, A Nurgaliyeva, MA Salman
Scientific Reports 16, 14751 , 2026
2026
A novel Pythagorean fuzzy similarity method for questionnaire analysis on the use of virtual library resources
PA Ejegwa, JO Ejegwa
Transactions on Fuzzy Sets and Systems 5 (1), 226–250 , 2026
2026
Novel q rung orthopair fuzzy correlation measure based on Spearman’s correlation scheme with application in vehicle selection problem
PA Ejegwa, TD Wanzenke, N Kausar, N Aydin
Beni-Suef University Journal of Basic and Applied Sciences 15 (24) , 2026
2026
Some new q-rung orthopair fuzzy distance techniques and their application to medical examination based on decision-making methods
PA Ejegwa, MT Anum, N Kausar, B Vrioni
Journal of Decisions and Operations Research 10 (3), 547-578 , 2025
2025
A Novel q-Rung Orthopair Fuzzy Distance Metric for Energy Source Selection
PA Ejegwa, MT Anum, N Kausar, CO Nwokoro, TA Cagin
Journal of Applied Research on Industrial Engineering 12 (3), 429-464 , 2025
2025
Citations: 7
An enhancement of smartphone selection process based on a new 3D Pythagorean fuzzy distance metric via TOPSIS technique
CO Abraham, PA Ejegwa, N Kausar, AD Akwu, T Cagin
Intelligent Data Analysis, https://doi.org/10.1177/1088467X25138762 , 2025
2025
Citations: 1
An enhanced Pythagorean fuzzy distance measure and its application in healthcare services
PA Ejegwa, NW Chiahemba, MT Anum
Digital Healthcare Technologies - Innovative Technologies and Changing … , 2025
2025
An enhance vehicle selection problem for an effective transportation system: a logarithmic-based distance measure approaches via q-rung orthopair fuzzy information
MT Anum, N Kausar, PA Ejegwa, B Vrioni, E Hoxha E
Contemporary Mathematics 6 (5), 6780-6811 , 2025
2025
Citations: 1
A decade of picture fuzzy sets in multi-criteria decision-making: a comprehensive review of trends, gaps, and future directions
CO Nwokoro, PA Ejegwa
Knowledge and Decision Systems with Applications 1, 145–164 , 2025
2025
Citations: 15
On Jordan-Holder theorem under intuitionistic fuzzy groups
PA Ejegwa, N Kausar, T Cagin
European Journal of Pure and Applied Mathematics 18 (2), 5908 , 2025
2025
Citations: 2
Jordan-Holder theorem for multigroups
PA Ejegwa, N Kausar, MA Ibrahim, T Cagin
European Journal of Pure and Applied Mathematics 18 (2), 5889 , 2025
2025
Citations: 1
On intuitionistic fuzzy characteristic and Frattini subgroups
PA Ejegwa, AI Isah
Notes on Intuitionistic Fuzzy Sets 31 (1), 64–79 , 2025
2025
Decision-Making Process under Uncertain Domain of Pythagorean Fuzzy Sets based on an Enhanced Similarity Operator
PA Ejegwa
Decision Making Under Uncertainty Via Optimization, Modelling, and Analysis … , 2025
2025
A modified Pythagorean fuzzy similarity operator with application in questionnaire analysis
PA Ejegwa
Transactions on Fuzzy Sets and Systems 4 (1), 108-128 , 2025
2025
Citations: 4

MOST CITED SCHOLAR PUBLICATIONS

Distance and similarity measures for Pythagorean fuzzy sets
PA Ejegwa
Granular Computing 5 (2), 225–238 , 2020
2020
Citations: 182
An overview on intuitionistic fuzzy sets
PA Ejegwa, SO Akowe, PM Otene, JM Ikyule
International Journal of Scientific & Technology Research 3 (3), 142-145 , 2014
2014
Citations: 181
Pythagorean fuzzy set and its application in career placements based on academic performance using max-min-max composition
PA Ejegwa
Complex and Intelligent Systems 5, 165–175 , 2019
2019
Citations: 134
Intuitionistic fuzzy set and its application in career determination via normalized Euclidean distance method
PA Ejegwa, AJ Akubo, OM Joshua
European scientific journal 10 (15) , 2014
2014
Citations: 127
Similarity-Distance Decision-Making Technique and its Applications via Intuitionistic Fuzzy Pairs
PA Ejegwa, JM Agbetayo
Journal of Computational and Cognitive Engineering, https://doi.org/10.47852 … , 2022
2022
Citations: 121
Improved composite relation for Pythagorean fuzzy sets and its application to medical diagnosis
PA Ejegwa
Granular Computing 5 (2), 277–286 , 2020
2020
Citations: 98
Modified Zhang and Xu’s distance measure for Pythagorean fuzzy sets and its application to pattern recognition problems: https://doi.org/10.1007/s00521-019-04554
PA Ejegwa
Neural Computing and Applications 32 (14), 10199–10208 , 2020
2020
Citations: 92
Intuitionistic fuzzy statistical correlation algorithm with applications to multi-criteria based decision-making processes
PA Ejegwa, IC Onyeke
International Journal of Intelligent Systems 36 (3), 1386–1407 , 2021
2021
Citations: 83
Novel distance measures for Pythagorean fuzzy sets with applications to pattern recognition problems
PA Ejegwa, JA Awolola
Granular Computing 6, 181-189 , 2021
2021
Citations: 80
Novel Pythagorean fuzzy correlation measures via Pythagorean fuzzy deviation, variance and covariance with applications to pattern recognition and career placement
PA Ejegwa, S Wen, Y Feng, W Zhang, N Tang
IEEE Transactions on Fuzzy Systems 30 (6), 1660–1668 , 2022
2022
Citations: 63
Intuitionistic fuzzy sets in career determination
PA Ejegwa, AJ Akubo, OM Joshua
Journal of Information and Computing Science 9 (4), 285-288 , 2014
2014
Citations: 59
Generalized triparametric correlation coefficient for Pythagorean fuzzy sets with application to MCDM problems
PA Ejegwa
Granular Computing 6 (3), 557–566 , 2021
2021
Citations: 55
An algorithm for an improved intuitionistic fuzzy correlation measure with medical diagnostic application
PA Ejegwa, IC Onyeke, V Adah
Annals of Optimization Theory and Practice 3 (3), DOI:10.22121/AOTP.2020 … , 2020
2020
Citations: 55
Novel correlation coefficient for intuitionistic fuzzy sets and its application to multi-criteria decision-making problems
PA Ejegwa
International Journal of Fuzzy System Applications 10 (2), 39-58 , 2021
2021
Citations: 54
Diagnosis of viral hepatitis using new distance measure of intuitionistic fuzzy sets
PA Ejegwa, ES Modom
Int J Fuzzy Math Arch 8 (1), 1-7 , 2015
2015
Citations: 51
New Pythagorean fuzzy-based distance operators and their applications in pattern classification and disease diagnostic analysis
PA Ejegwa, Y Feng, S Tang, JM Agbetayo, X Dai
Neural Computing and Applications; https://doi.org/10.1007/s00521-022-07679-3 , 2022
2022
Citations: 50
Generalized similarity operator for intuitionistic fuzzy sets and its applications based on recognition principle and multiple criteria decision making technique
Y Zhou, PA Ejegwa, SE Johnny
International Journal of Computational Intelligence Systems 16 (85) , 2023
2023
Citations: 49
Enhanced intuitionistic fuzzy similarity operators with applications in emergency management and pattern recognition
PA Ejegwa, S Ahemen
Granular Computing; https://doi.org/10.1007/s41066-022-00334-1 , 2022
2022
Citations: 48
New similarity measures for Pythagorean fuzzy sets with applications
PA Ejegwa
International Journal of Fuzzy Computation and Modelling 3 (1), 75-94 , 2020
2020
Citations: 45
Fermatean Fuzzy Modified Composite Relation and its Application in Pattern Recognition
PA Ejegwa, D Zuakwagh
Journal of Fuzzy Extension and Applications 3 (2), 140–151 , 2022
2022
Citations: 40

Dr. Paul Augustine Ejegwa

EDUCATION

RESEARCH INTERESTS

Scopus Publications

RECENT SCHOLAR PUBLICATIONS

MOST CITED SCHOLAR PUBLICATIONS