Godwin Okeke

Dr. Godwin Okeke


Research Focus & Metrics

Academic Career Length

14Years (2013-Present)

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

Representative Publications

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16 February 2017 in Arabian Journal of Mathematics
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GOGodwin Okeke
Godwin Okeke
MAMujahid Abbas
Mujahid Abbas
The purpose of this paper is to introduce Picard–Krasnoselskii hybrid iterative process which is a hybrid of Picard and Krasnoselskii iterative processes. In case of contractive nonlinear operators, our iterative scheme converges faster than all of Picard, Mann, Krasnoselskii and Ishikawa iterative processes in the sense of Berinde (Iterative approximation of fixed points, 2002 ). We support our analytic proofs with a numerical example. Using this iterative process, we also find the solution of delay differential equation.

6 May 2015 in Fixed Point Theory and Applications
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HAHudson Akewe
Hudson Akewe
GOGodwin Okeke
Godwin Okeke
In this paper we use the general class of contractive-like operators introduced by Bosede and Rhoades (J. Adv. Math. Stud. 3(2):1-3, 2010) to prove strong convergence and stability results for Picard-Mann hybrid iterative schemes considered in a real normed linear space. We establish the strong convergence and stability of the Picard iterative scheme as a corollary. Our results generalize and improve a multitude of results in the literature, including the recent results of Chidume (Fixed Point Theory Appl. 2014:233, 2014).

20 March 2020 in Discrete Dynamics in Nature and Society
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GOGodwin Okeke
Godwin Okeke
MAMujahid Abbas
Mujahid Abbas
Manuel De La SenManuel De La Sen
Manuel De La Sen
In this paper, we approximate the fixed points of multivalued quasi-nonexpansive mappings via a faster iterative process and propose a faster fixed-point iterative method for finding the solution of two-point boundary value problems. We prove analytically and with series of numerical experiments that the PicardIshikawa hybrid iterative process has the same rate of convergence as the CR iterative process.

1 August 2020 in Heliyon
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GOGodwin Okeke
Godwin Okeke
DFDaniel Francis
Daniel Francis
Manuel De La SenManuel De La Sen
Manuel De La Sen
We prove some theorems on the existence and uniqueness of fixed point for Reich-type contraction mappings and Geraghty-type mappings satisfying rational inequalities in modular metric spaces. Our results include the results of [1] and [2] as special cases. Furthermore, we apply our main results in proving the existence and uniqueness of solution of nonlinear Barbashin-type integrodifferential equation satisfying a given initial value problem in modular metric space Xω.

21 February 2014 in Fixed Point Theory and Applications
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HAHudson Akewe
Hudson Akewe
GOGodwin Okeke
Godwin Okeke
AOAdekunle F Olayiwola
Adekunle F Olayiwola
In this paper, we introduce Kirk-multistep and Kirk-multistep-SP iterative schemes and prove their strong convergences and stabilities for contractive-type operators in normed linear spaces. By taking numerical examples, we compare the convergence speed of our schemes (Kirk-multistep-SP iterative schemes) with the others (Kirk-SP, Kirk-Noor, Kirk-Ishikawa, Kirk-Mann and Kirk iterative schemes) for this class of operators. Our results generalize and extend most convergence and stability results in the literature.