Ojen Kumar Narain

Dr. Ojen Kumar Narain

University of KwaZulu-Natal, Durban, KwaZulu-Natal, South Africa
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Research Focus & Metrics

Academic Career Length

6Years (2021-Present)

(Calculated once Scilit publication data is synced: current year − year of first publication + 1)

Representative Publications

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26 October 2023 in Numerical Algorithms
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Journal Article
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AOAustine Efut Ofem
Austine Efut Ofem
AMAkindele Adebayo Mebawondu
Akindele Adebayo Mebawondu
GUGodwin Chidi Ugwunnadi
Godwin Chidi Ugwunnadi
PCPrasit Cholamjiak
Prasit Cholamjiak
ONOjen Kumar Narain
Ojen Kumar Narain

3 May 2022 in Numerical Functional Analysis and Optimization
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Journal Article
Closed access
HAH. A. Abass
H. A. Abass
GUG. C. Ugwunnadi
G. C. Ugwunnadi
ONOjen Kumar Narain
Ojen Kumar Narain
Vahid DarvishVahid Darvish
Vahid Darvish
In this paper, by employing a Bregman distance approach, we introduce a self-adaptive inertial extragradient method for finding a common solution of variational inequality problem involving a pseudo-monotone operator and fixed point problem of a Bregman demigeneralized mapping in a reflexive Banach spaces. Using a Bregman distance approach, we establish a strong convergence result for approximating the common solution of the aforementioned problems under some mild assumptions. We display some numerical examples to show the performance of our iterative method. The result presented in this paper extends and complements many related results in literature.

1 January 2023 in Journal of Industrial and Management Optimization
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JAJacob Abuchu
Jacob Abuchu
GUGodwin Chidi Ugwunnadi
Godwin Chidi Ugwunnadi
ONOjen Kumar Narain
Ojen Kumar Narain
In this paper, we study a modified relaxed inertial Mann-type iterative algorithm for solving split monotone variational inclusion problem without prior knowledge of the bounded linear operator norm in real Hilbert spaces. Under some appropriate assumptions on the parameters, we established a strong convergence result of the proposed algorithm. As applications, some special cases of the general problem are given. Finally, we also give some numerical illustrations of the proposed method in comparison with other methods in the literature to show the applicability and advantage of our results.

11 October 2022 in Mathematics
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AOAustine Efut Ofem
Austine Efut Ofem
JAJacob Abuchu
Jacob Abuchu
Reny GeorgeReny George
Reny George
GUGodwin Chidi Ugwunnadi
Godwin Chidi Ugwunnadi
ONOjen Kumar Narain
Ojen Kumar Narain
In this article, we introduce a new mixed-type iterative algorithm for approximation of common fixed points of two multivalued almost contractive mappings and two multivalued mappings satisfying condition (E) in hyperbolic spaces. We consider new concepts of weak w2-stability and data dependence results involving two multivalued almost contractive mappings. We provide examples of multivalued almost contractive mappings to show the advantage of our new iterative algorithm over some exiting iterative algorithms. Moreover, we prove several strong ∆-convergence theorems of our new algorithm in hyperbolic spaces. Furthermore, with another novel example, we carry out a numerical experiment to compare the efficiency and applicability of a new iterative algorithm with several leading iterative algorithms. The results in this article extend and improve several existing results from the setting of linear and CAT(0) spaces to hyperbolic spaces. Our main results also extend several existing results from the setting of single-valued mappings to the setting of multivalued mappings.

22 March 2023 in Journal of Mathematics
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Open access
JAJacob Abuchu
Jacob Abuchu
AOAustine Efut Ofem
Austine Efut Ofem
GUGodwin Chidi Ugwunnadi
Godwin Chidi Ugwunnadi
ONOjen Kumar Narain
Ojen Kumar Narain
AHAzhar Hussain
Azhar Hussain
This paper considers an alternated inertial-type extrapolation algorithm for solving bilevel pseudomonotone variational inequality problem in the framework of real Hilbert spaces with split variational inequality and fixed-point constraints of demimetric mapping. The algorithm which involves alternated inertial uses self-adjustment stepsize condition that depends solely on the information from previous iterative step. The bilevel problem considered in the work consists of upper-level problem with an underlying operator which is pseudomonotone, while the lower problem is associated with strongly monotone mapping and the fixed-point constraint of demimetric mapping. Our algorithm is anchored on modified projection and contraction techniques, fused with alternated inertial and relaxation. Under some suitable conditions on the algorithm control parameters, we obtain a strong convergence result of the proposed method without the prior knowledge of the operator norm or the coefficients of the underlying operators within the scope of real Hilbert spaces. Finally, some numerical examples are presented to illustrate the gain of our method in comparison to some related algorithms in the literature.

8 July 2023 in The Journal of Analysis
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Journal Article
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JAJacob Abuchu
Jacob Abuchu
GUGodwin Chidi Ugwunnadi
Godwin Chidi Ugwunnadi
ONOjen Kumar Narain
Ojen Kumar Narain