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Latest Published Articles

Solution of generalized Abel’s integral equation using orthogonal polynomials

OMA-Vol. 6 (2022), Issue 2, pp. 65 – 73 Open Access Full-Text PDF
Mamman Ojima John, Aboiyar Terhemen and Tivde Tertsegha

Abstract:This research presents the solution of the generalized version of Abel’s integral equation, which was computed considering the first and second kinds. First, Abel’s integral equation and its generalization were described using fractional calculus, and the properties of Orthogonal polynomials were also described. We then developed a technique of solution for the generalized Abel’s integral equation using infinite series of orthogonal polynomials and utilized the numerical method to approximate the generalized Abel’s integral equation of the first and second kind, respectively. The Riemann-Liouville fractional operator was used in these examples. Our technique was implemented in MAPLE 17 through some illustrative examples. Absolute errors were estimated. In addition, the occurred errors between using orthogonal polynomials for solving Abel’s integral equations of order \(0\ <\ \alpha \ <\ 1\) and the exact solutions show that the orthogonal polynomials used were highly effective, reliable and can be used independently in situations where the exact solution is unknown which the numerical experiments confirmed.

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Stabilities of non-standard Euler-Maruyama scheme’s for Vasicek and geometric brownian motion models

OMA-Vol. 6 (2022), Issue 2, pp. 51 – 64 Open Access Full-Text PDF
Badibi O. Christopher, Ramadhani I., Ndondo M. Apollinaire and Kumwimba S. Didier

Abstract:Stochastic differential equations (SDEs) are a powerful tool for modeling certain random trajectories of diffusion phenomena in the physical, ecological, economic, and management sciences. However, except in some cases, it is generally impossible to find an explicit solution to these equations. In this case, the numerical approach is the only favorable possibility to find an approximative solution. In this paper, we present the mean and mean-square stability of the Non-standard Euler-Maruyama numerical scheme using the Vasicek and geometric Brownian motion models.

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On a class of \(p\)-valent functions with negative coefficients defined by opoola differential operator

OMA-Vol. 6 (2022), Issue 2, pp. 35 – 50 Open Access Full-Text PDF
Bitrus Sambo and Timothy Oloyede Opoola

Abstract:Using opoola differential operator, we defined a subclass \(S^{n}_{p}(\lambda,\alpha,\gamma,\delta)\) of the class of multivalent or p-valent functions. Several properties of the class were studied, such as coefficient inequalities, hadamard product, radii of close-to-convex, star-likeness, convexity, extreme points, the integral mean inequalities for the fractional derivatives, and further growth and distortion theorem are given using fractional calculus techniques.

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Results of semigroup of linear operators generating a nonlinear Schrödinger equation

OMA-Vol. 6 (2022), Issue 2, pp. 29 – 34 Open Access Full-Text PDF
J. B. Omosowon, A. Y. Akinyele and F. Y. Aderibigbe

Abstract:In this paper, we present results of \(\omega\)-order preserving partial contraction mapping generating a nonlinear Schr\”odinger equation. We used the theory of semigroup to generate a nonlinear Schr\(\ddot{o}\)dinger equation by considering a simple application of Lipschitz perturbation of linear evolution equations. We considered the space \(L^2(\mathbb{R}^2)\) and of linear operator \(A_0$ by $D(A_0)=H^2(\mathbb{R}^2)\) and \(A_0u=-i\Delta u\) for \(u\in D(A_0)\) for the initial value problem, we hereby established that \(A_0\) is the infinitesimal generator of a \(C_0\)-semigroup of unitary operators \(T(t)\), \(-\infty

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On generalized Tetranacci numbers: Closed forms of the sum formulas \(\sum\limits_{k=0}^{n}kx^{k}W_{k}\) and \(\sum\limits_{k=1}^{n}kx^{k}W_{-k}\)

OMA-Vol. 6 (2022), Issue 2, pp. 1 – 28 Open Access Full-Text PDF
Yüksel Soykan, Erkan Taşdemir and Inci Okumuş

Abstract:In this paper, closed forms of the sum formulas \(\sum\limits_{k=0}^{n}kx^{k}W_{k}\) and \(\sum\limits_{k=1}^{n}kx^{k}W_{-k}\) for generalized Tetranacci numbers are presented. As special cases, we give summation formulas of Tetranacci, Tetranacci-Lucas, and other fourth-order recurrence sequences.

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Compatible maps of type \((\beta)\) in intuitionistic generalized fuzzy metric spaces

ODAM-Vol. 5 (2022), Issue 3, pp. 1 – 12 Open Access Full-Text PDF
R. Pandiselvi, M. Jeyaraman and A. Ramachandran

Abstract: This paper presents several fixed point theorems for intuitionistic generalized fuzzy metric spaces with an implicit relation. Specifically, we utilize compatible maps of type \((\beta)\) in intuitionistic generalized fuzzy metric spaces to derive our fixed point theorems. Our results not only extend but also generalize some fixed point theorems that were previously established in complete fuzzy metric spaces. This is achieved by introducing a novel technique, which enhances the applicability and scope of the existing fixed point theorems.

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BOOK - NULL CONTROLLABILITY OF DEGENERATE AND NON-DEGENERATE SINGULAR PARABOLIC