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FOI Documents








Abubakar Jamilu

Brief Biography

Jamilu Abubakar successfully earned his PhD in Applied Mathematics from King Mongkut's University of Technology Thonburi, having been under the guidance of Prof. Poom Kumam at KMUTT, Thailand, and co-supervised by Prof. Vasile Berinde from the Technical University of Cluj-Napoca North University Centre at Baia Mare, Romania. During the period of 2018- 2021, he held the position of a Petchra PraJom Klao PhD Research scholar. Dr. Abubakar's academic pursuits center around functional analysis, analysis, geometry, topology, and the intersections between these disciplines. His research endeavors primarily focus on nonlinear analysis and optimization theory, exploring their applications in various contexts. Presently, Dr. Abubakar is currently interested in applied and computational mathematics with applications in machine learning.

Area of specialization:Nonlinear Analysis and Optimizations
Email:abubakar.jamilu@udusok.edu.ng, jamilububakar@gmail.com
Phone:+234(0)8062619307

List of Selected Publications

1. Kratuloek, K., Kumam, P., Sriwongsa, S. and Abubakar J., A relaxed splitting method for solving variational inclusion and fixed point problems. Comp. Appl. Math. 43:70, 2024. https://doi.org/10.1007/s40314-023-02583-5
2. – Abubakar J., Chaipunya P., Kumam P., Iterative method for split equilibrium problem and minimization problem via conjugate gradient method. Journal of Computational and Applied Mathematics, 429, 115191, 2023. https://doi.org/10.1016/j.cam.2023.115193
3. Abubakar J., Kumam P., Garba AI, Ibrahim AH, Jirakitpuwapat W., Hybrid Iterative Scheme for Variational Inequality Problem Involving Pseudo-monotone Operator with Application in Signal Recovery. Bulletin of the Iranian Mathematical Society. 48, 2995–3017, 2022. https://doi.org/10.1007/s41980-022-00678-z
4. Abubakar J., Poom K. and Habib ur. A Self-adaptive inertial subgradient extragradient scheme for pseudomonotone variational inequality problem. International Journal of Nonlinear Sciences and Numerical Simulation. https://doi.org/10.1515/ijnsns-2020-003
5. Abubakar J., Deepho J., and Poom K. Viscosity algorithm for solving split generalized equilibrium problem and fixed-point problem. Carpathian Journal of Mathematics. https://www.jstor.org/stable/27105192
6. Abubakar J., Kumam P., Taddele GH., Ibrahim AH and Siithithakerngkiet K. Strong con- vergence of alternated inertial CQ relaxed method with application in signal recovery. Computational and Applied Mathematics. https://doi.org/10.1007/s40314-021-01567-7
7. Abubakar J., Kumam P, Abor IG, Abdullahi MS, Ibrahim AH, Sitthithakerngkiet K. An inertial iterative scheme for solving variational inclusion with application to Nash-Cournot equilibrium and image restoration problems. Carpathian Journal of Mathematics. https:// https://doi.org/10.1007/s41980-022-00678-z
8. Abubakar J., Kumam P, Garba AI, Abdullahi MS, Ibrahim AH, Jirakitpuwapat W. An efficient iterative method for solving split variational inclusion problem with applications. Journal of Industrial & Management Optimization. https://doi.org/10.3934/jimo.2021160
9. Abubakar J., Kumam P., and Deepho J. Multistep hybrid viscosity method for split monotone variational inclusion and fixed point problems in Hilbert spaces. Aims Mathematics, 5(6) 5969–5992. https://doi.org/10.3934/math.2020382
10. Abubakar J., Kumam P, Ibrahim AH, Padcharoen A. Relaxed Inertial Tseng’s Type Method for Solving the Inclusion Problem with Application to Image Restoration. Mathematics. 2020 May;8(5):818. https://doi.org/10.3390/math8050818
11. Abubakar J., Kumam P, Ibrahim AH. Inertial iterative schemes with variable step sizes for variational inequality problem involving pseudomonotone operator. Mathematics https://doi.org/10.3390/math8040609
12. Abubakar J., Sombut K, Ibrahim AH. An accelerated subgradient extragradient algorithm for strongly pseudomonotone variational inequality problems. Thai Journal of Mathematics. 2019 Dec 25;18(1):166-87
13. Sumalai P., Abubakar J., Kumam P, Salisu S., A unified scheme for solving split inclusions with applications. Mathematical Methods in Applied Sciences. 46:13, 14622-14639 2023. https://doi.org/10.1002/mma.9338
14. Ibrahim AH, Kumam P, Abubakar AB, Abubakar J. A derivative-free projection method for nonlinear equations with non-Lipschitz operator: application to LASSO problem. Mathematical Methods in Applied Sciences, 46:8, 9006-9027, 2023. https://doi.org/10.1002/mma.9033
15. Padcharoen A., Sokhuma K., Abubakar J., Projection methods for quasi-nonexpansive multivalued mappings in Hilbert spaces. AIMS Mathematics, 8:3, 7242-7257. 2023 https://doi.org/10.3934/math.2023364
16. Ibrahim AH., Kumam P., Abubakar AB., Abubakar J., Rilwan J, Taddele GH. Derivative- free MLSCD conjugate gradient method for sparse signal and image reconstruction in compressive sensing. Filomat, 6:6, 2011–2024, 2022. https://doi.org/10.2298/FIL2206011I
17. Ibrahim AH, Kumam P., Abubakar, AB, Abubakar J., A descent three-term derivative-free method for signal reconstruction in compressive sensing. Carpathian Journal of Mathematics, 38:2, 431-443, 2022. https://www.jstor.org/stable/27105204
18. Salisu, S., Kumam, P., Sriwongsa, S. and Abubakar J., On minimization and fixed point problems in Hadamard spaces. Computational and Applied Mathematics. 41:117, 2022. https://doi.org/10.1080/02331934.2021.2002326
19. Ibrahim AH, Kumam P, Hassan BA, Abubakar AB, Abubakar J., A Derivative- Free Three-Term Hestenes-Stiefel Type Method for Constrained Nonlinear Equations and Image Restoration. International Journal of Computer Mathematics. 99:5, 1041-1065, 2022. https://doi.org/10.1080/00207160.2021.1946043
20. Ibrahim AH, Kumam P, Abubakar, AB, Abubakar, J. A method with inertial extrapolation step for convex constrained monotone equations. Journal of Inequalities and Applications. 189:2021, 2021. https://doi.org/10.1186/s13660-021-02719-3
21. Abubakar AB, Muangchoo K, Ibrahim AH, Abubakar J., Rano SA. FR-type al- gorithm for finding approximate solutions to nonlinear monotone operator equations. Arabian Journal of Mathematics, 10, 261–270, 2021. https://doi.org/10.1007/s40065-021-00313-5
22. Garba AI., Abubakar J., Abubakar SS. An Inertial Projection and Contraction Scheme for Monotone Variational Inequality Problems. Thai Journal of Mathematics. 19(3):1112–1133. https://doi.org/10.1155/2021/5549878
23. Taddele GH, Kumam P, Gabrie AG. and Abubakar J., Ball-relaxed projection algorithms for multiple-sets split feasibility problem. Optimization, 3571-3601 , 2021. https://doi.org/10.1080/02331934.2021.1905640
24. Ibrahim AH, Kumam P, Abubakar AB, Jirakitpuwapat W, Abubakar J., A hybrid conjugate gradient algorithm for constrained monotone equations with application in compressive sensing. Heliyon. 6:3, 2021. https://doi.org/10.1016/j.heliyon.2020.e03466
25. Ahmed, I., Kumam, P., Abubakar, J., Solutions for impulsive fractional pantograph differential equation via generalized anti-periodic boundary condition. Advances in Difference Equation. 2020: 477, 2020. https://doi.org/10.1186/s13662-020-02887-4
26. Abdullahi MS., Kumam, P., and Abubakar J., Coincidence and self-coincidence of maps between digital images. Topological Method in Nonlinear Analysis 56(2) 607–628.
27. Ibrahim AH, Kumam P, Abubakar AB, Abubakar J., Muhammad AB. ‘Least-square- based three-term conjugate gradient projection method for l1-norm problems with application to compressed sensing. Mathematics. 1;8(4):602, 2020. https://doi.org/10.3390/math8040602
28. Ibrahim AH, Garba AI, Usman H, Abubakar J., Abubakar AB. Derivative-free RMIL conjugate gradient method for convex constrained equations. Thai Journal of Mathematics. 18:1, 212–232, 2020. https://thaijmath2.in.cmu.ac.th/index.php/thaijmath/article/view/994
29. Aremu KO, Abdulmumin RA., Ibrahim M., Abubakar J., Some Results Associated with the Diagonals of Derived Plane Permutations. Punjab University Journal of Mathematics. 2018;5(1):9-5.
30. Garba AI, and Abubakar J., Construction of an Algebraic Structure Using a Concatenation Map. Nig. J. Basic & Appl. Sc. 2015; 23(2): 117-120.
H. Google Scholar Link:
https://scholar.google.co.th/citations?user=RSzHjfAAAAAJ&hl=en
I. Scopus ID Link:
https://www.scopus.com/authid/detail.uri?authorId=57215204873
K. Orcid ID Link:
https://orcid.org/0000-0002-4051-399X
vL. Social Media Handles:
Facebook: https://web.facebook.com/jamil32a X: @jamilbubakar