#### Earthline Journal of Mathematical Sciences

Journal Information
EISSN : 2581-8147
Current Publisher: Earthline Publishers (10.34198)
Total articles ≅ 130
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#### Latest articles in this journal

Published: 11 January 2021
Earthline Journal of Mathematical Sciences; doi:10.34198/ejms

Timilehin G. Shaba, Abd'Gafar T. Tiamiyu, Ismaila O. Ibrahim, Abdullahi A. Ibrahim
Published: 11 January 2021
Earthline Journal of Mathematical Sciences, Volume 6, pp 87-103; doi:10.34198/ejms.6121.87103

Abstract:
In this paper we introduce a new subclass $\mathcal{R}^*(p,g,\psi,\varrho,\beta,\phi,\gamma,\zeta)$ of $p$-valent functions with negative coefficient defined by Hadamard product associated with a generalized differential operator. Radii of close-to-convexity, starlikeness and convexity of the class $\mathcal{R}^*(p,g,\psi,\varrho,\beta,\phi,\gamma,\zeta)$ are obtained. Also, distortion theorem, growth theorem and coefficient inequalities are established.
G. C. Ibeh, E. J. Ekpenyoung, K. Anyiam, C. John
Published: 4 January 2021
Earthline Journal of Mathematical Sciences, Volume 6, pp 65-86; doi:10.34198/ejms.6121.6586

Abstract:
This study introduces a new distribution in the family of generalized exponential distributions generated using the transformed-transformer method. Some properties of the distribution are presented. The new distribution has three parameters and they are estimated numerically using the BGFS iterative method implemented in R software. Two real sets of data are adopted to demonstrate the flexibility and potential applications of the new distribution.
Published: 13 December 2020
Earthline Journal of Mathematical Sciences, Volume 6, pp 33-63; doi:10.34198/ejms.6121.3363

Abstract:
In this paper the generalized inverse distribution is defined. Some properties and applications of the generalized inverse distribution are studied in some detail. Characterization theorems generalizing the new family in terms of the hazard function are obtained. Recommendation for further study concludes the paper.
Samuel U. Enogwe, Happiness O. Obiora-Ilouno, Chrisogonus K. Onyekwere
Published: 10 December 2020
Earthline Journal of Mathematical Sciences, Volume 6, pp 1-32; doi:10.34198/ejms.6121.132

Abstract:
This paper introduces an inverse power Akash distribution as a generalization of the Akash distribution to provide better fits than the Akash distribution and some of its known extensions. The fundamental properties of the proposed distribution such as the shapes of the distribution, moments, mean, variance, coefficient of variation, skewness, kurtosis, moment generating function, quantile function, Rényi entropy, stochastic ordering and the distribution of order statistics have been derived. The proposed distribution is observed to be a heavy-tailed distribution and can also be used to model data with upside-down bathtub shape for its hazard rate function. The maximum likelihood estimators of the unknown parameters of the proposed distribution have been obtained. Two numerical examples are given to demonstrate the applicability of the proposed distribution and for the two real data sets, the proposed distribution is found to be superior in its ability to sufficiently model heavy-tailed data than Akash, inverse Akash and power Akash distributions respectively.
Festus C. Opone, Elvis A. Izekor, Innocent U. Akata, Francis E. U. Osagiede
Published: 22 November 2020
Earthline Journal of Mathematical Sciences pp 415-428; doi:10.34198/ejms.5221.415428

Abstract:
In this paper, we introduced the discrete analogue of the continuous Marshall-Olkin Weibull distribution using the discrete concentration approach. Some mathematical properties of the proposed discrete distribution such as the probability mass function, cumulative distribution function, survival function, hazard rate function, second rate of failure, probability generating function, quantile function and moments are derived. The method of maximum likelihood estimation is employed to estimate the unknown parameters of the proposed distribution. The applicability of the proposed discrete distribution was examined using an over-dispersed and under-dispersed data sets.
Published: 16 November 2020
Earthline Journal of Mathematical Sciences, Volume 5, pp 411-414; doi:10.34198/ejms.5221.411414

Abstract:
In [1], Wardowski introduced the F-contractions, and used it to prove the Banach contraction principle. In this paper we introduce a concept of F-interpolative Berinde weak contraction, and use it to prove the interpolative Berinde weak mapping theorem of [2].
Published: 10 November 2020
Earthline Journal of Mathematical Sciences, Volume 5, pp 395-410; doi:10.34198/ejms.5221.395410

Abstract:
This article gives an effective strategy to solve nonlinear stochastic Itô-Volterra integral equations (NSIVIE). These equations can be reduced to a system of nonlinear algebraic equations with unknown coefficients, using Bernoulli wavelets, their operational matrix of integration (OMI), stochastic operational matrix of integration (SOMI) and these equations can be solved numerically. Error analysis of the proposed method is given. Moreover, the results obtained are compared to exact solutions with numerical examples to show that the method described is accurate and precise.
Erhan Güler
Published: 30 October 2020
Earthline Journal of Mathematical Sciences pp 425-431; doi:10.34198/ejms.4220.425431

Abstract:
We introduce the fourth fundamental form of the torus hypersurface in the four dimensional Euclidean space. We also compute I, II, III and IV fundamental forms of a torus hypersurface.
Published: 29 October 2020
Earthline Journal of Mathematical Sciences, Volume 5, pp 377-393; doi:10.34198/ejms.5221.377393

Abstract:
In this paper, we introduce the notions of T-fuzzy ideal, T-fuzzy quasi ideal, T-fuzzy bi-ideal, and T-fuzzy interior ideal. Some related properties are obtained. in coupled $\Gamma$ semirings. Our work is inspired by [1].