https://earthlinepublishers.com/index.php/ejms/issue/feed Earthline Journal of Mathematical Sciences 2020-07-08T10:25:41-04:00 Fabiola Malowney ejms@earthlinepublishers.com Open Journal Systems <p style="text-align: justify;">The Earthline Journal of Mathematical Sciences (e-ISSN: 2581-8147) is a peer-reviewed international journal devoted to publishing original research papers containing substantial contributions in any direction of Pure and Applied Mathematics, Theoretical and Applied Statistics, Theoretical Computer Science, Mathematical Physics, Mathematical Chemistry, Mathematical Modelling, Mathematical Biology. Applications of Mathematics in Finance and Economics are also welcome.</p> https://earthlinepublishers.com/index.php/ejms/article/view/182 On Commutators of Fuzzy Multigroups 2020-05-23T08:22:27-04:00 P. A. Ejegwa ocholohi@gmail.com J. M. Agbetayo agbetayojohnson@gmail.com <p>Fuzzy multigroup is an application of fuzzy multiset to group theory. Although, a lots have been done on the theory of fuzzy multigroups, some group's theoretic notions could still be investigated in fuzzy multigroup context. Certainly, the idea of commutator is one of such group's theoretic notions yet to be studied in the environment of fuzzy multigroups. Hence, the aim of this article is to establish the notion of commutator in fuzzy multigroup setting. A number of some related results are obtained and characterized. Among several results that are obtained,&nbsp; it is established that, if $A$ and $B$ are fuzzy submultigroups of a fuzzy multigroup $C$, then&nbsp; $[A, B]\subseteq A\cup B$ holds. Some homomorphic properties of commutator in fuzzy multigroup context are&nbsp;&nbsp; discussed. The notion of admissible fuzzy submultisets $A$ and $B$ of $C\in FMG(X)$&nbsp; under an operator domain $\mathcal{D}$ is explicated,&nbsp; and it is shown that $(A,B)$ and $[A,B]$ are $\mathcal{D}$-admissible.</p> 2020-05-22T00:00:00-04:00 Copyright (c) https://earthlinepublishers.com/index.php/ejms/article/view/183 Applications of Certain Operators to the Classes of Analytic Functions Related to the Generalized Janowski Functions 2020-05-24T07:24:23-04:00 Khalida Inayat Noor khalida@gmail.com Shujaat Ali Shah shahglike@yahoo.com <p>We introduce certain subclasses of analytic functions related to the class of analytic, convex univalent functions. We discuss some results including inclusion relationships and invariance of the classes under convex convolution in terms of certain linear operators. Applications of these results associated with the generalized Janowski functions and conic domains are considered. Also, several radius problems are investigated.</p> 2020-05-24T00:00:00-04:00 Copyright (c) https://earthlinepublishers.com/index.php/ejms/article/view/186 A Study on Generalized Jacobsthal-Padovan Numbers 2020-05-29T13:24:29-04:00 Yüksel Soykan yuksel_soykan@hotmail.com <p>In this paper, we investigate the generalized Jacobsthal-Padovan sequences and we deal with, in detail, four special cases, namely, Jacobsthal-Padovan, Jacobsthal-Perrin, adjusted Jacobsthal-Padovan and modified Jacobsthal-Padovan sequences. We present Binet’s formulas, generating functions, Simson formulas, and the summation formulas for these sequences. Moreover, we give some identities and matrices related with these sequences.</p> 2020-05-29T00:00:00-04:00 Copyright (c) https://earthlinepublishers.com/index.php/ejms/article/view/187 Some Fixed Point Theory Results for the Interpolative Berinde Weak Operator 2020-06-02T10:46:17-04:00 Clement Boateng Ampadu drampadu@hotmail.com <p>Partially inspired by [Erdal Karapinar, Ravi Agarwal and Hassen Aydi, Interpolative Reich-Rus-Ćirić type contractions on partial metric spaces, <em>Mathematics</em> 6 (2018), 256] and [V. Berinde, Approximating fixed points of weak contractions using the Picard iteration, <em>Nonlinear Anal. Forum</em> 9(1) (2004), 43-53], we introduce a concept of interpolative Berinde weak contraction, and obtain some existence theorems for mappings satisfying such a contractive definition, and some of its extensions.</p> 2020-06-02T00:00:00-04:00 Copyright (c) https://earthlinepublishers.com/index.php/ejms/article/view/189 Alternative Axial Distances for Spherical Regions of Central Composite Designs 2020-06-09T09:36:28-04:00 Linus Ifeanyi Onyishi fc.eze@unizik.edu.ng F. C. Eze fc.eze@unizik.edu.ng <p>Alternatives to the existing axial distances of the Central Composite Design (CCD) in spherical design using three axial distances were studied. The aim of this study is to determine a better alternative to already existing axial distances whose prediction properties are more stable in the spherical design regions. Using the concepts of the three Pythagorean means, the arithmetic, harmonic and geometric axial distances for spherical regions were developed. The performances of the alternative axial distances were compared with the existing ones using the <em>D</em> and <em>G</em> optimality criteria. The study shows that the alternative axial distances are better using the <em>D</em> and <em>G</em> optimality criteria.</p> 2020-06-09T00:00:00-04:00 Copyright (c) https://earthlinepublishers.com/index.php/ejms/article/view/190 Some Topological Measures for Nicotine 2020-06-09T13:11:21-04:00 Abaid ur Rehman Virk abaid.math@gmail.com <p>A topological index is a quantity expressed as a number that help us to catch symmetry of chemical compounds. With the help of quantitative structure property relationship (QSPR), we can guess physical and chemical properties of several chemical compounds. Here, we will compute Shingali &amp; Kanabour, Gourava and hype Gourava indices for the chemical compound Nicotine.</p> 2020-06-09T00:00:00-04:00 Copyright (c) https://earthlinepublishers.com/index.php/ejms/article/view/195 A Study on Generalized Fibonacci Numbers: Sum Formulas $\sum_{k=0}^{n}kx^{k}W_{k}^{3}$ and $\sum_{k=1}^{n}kx^{k}W_{-k}^{3}$ for the Cubes of Terms 2020-06-15T09:32:44-04:00 Yüksel Soykan yuksel_soykan@hotmail.com <p>In this paper, closed forms of the sum formulas $\sum_{k=0}^{n}kx^{k}W_{k}^{3}$ and $\sum_{k=1}^{n}kx^{k}W_{-k}^{3}$ for the&nbsp;cubes of generalized Fibonacci numbers are presented. As special cases, we&nbsp;give sum formulas of Fibonacci, Lucas, Pell, Pell-Lucas, Jacobsthal,&nbsp;Jacobsthal-Lucas numbers.</p> 2020-06-15T00:00:00-04:00 Copyright (c) https://earthlinepublishers.com/index.php/ejms/article/view/200 Topological Properties for Harmonic τ-Uniformly Convex Functions of Order ρ Associated with Wanas Differential Operator 2020-06-25T11:02:38-04:00 Abbas Kareem Wanas abbas.kareem.w@qu.edu.iq <p>The purpose of the present paper is to establish some topological properties for a certain family of harmonic τ-uniformly convex functions of order ρ associated with Wanas differential operatordefined in the open unit disk <em>U</em>.</p> 2020-06-25T00:00:00-04:00 Copyright (c) https://earthlinepublishers.com/index.php/ejms/article/view/201 Modeling and Forecasting Under-Five Mortality Rate in Nigeria using Auto-Regressive Integrated Moving Average Approach 2020-07-01T12:33:32-04:00 Donalben Onome Eke ekeonome@gmail.com Friday Ewere friday.ewere@uniben.edu <p>Nigeria’s efforts aimed at reducing avoidable child deaths have been met with gradual and sustained progress. Despite the decline in childhood mortality in Nigeria in the last two decades, its prevalence still remain high in comparison to the global standard of mortality for children under the age of five which stands at 25 deaths per 1000 live births. Knowledge of the chances of Nigeria achieving this goal for childhood mortality will aid proper interventions needed to reduce the occurrence.</p> <p>Therefore, this paper employed the Auto-Regressive Integrated Moving Average (ARIMA) model for time series analysis to make forecast of under-five mortality in Nigeria up to 2030 using data obtained from the United Nation’s Inter Agency Group for Childhood Mortality Estimate (UN-IGME).</p> <p>The ARIMA (2, 1, 1) model predicted a reduction of up to 37.3% by 2030 at 95% confidence interval. Results from the study also showed that a reduction of over 300% in under-five mortality is required for Nigeria to be able to achieve the SDG goal for under-five mortality.</p> 2020-07-01T00:00:00-04:00 Copyright (c) https://earthlinepublishers.com/index.php/ejms/article/view/203 Complementary Kumaraswamy Weibull Power Series Distribution: Some Properties and Application 2020-07-04T12:34:46-04:00 Innocent Boyle Eraikhuemen ieraikhuemen@biu.edu.ng Julian Ibezimako Mbegbu Julian.mbegbu@uniben.edu Friday Ewere Friday.ewere@uniben.edu <p>In this paper, we propose Complementary Kumaraswamy Weibull Power Series (CKWPS) Distributions. The method is obtained by compounding the Kumaraswamy-G distribution and Power Series distribution on a latent complementary distance problem base. The mathematical properties of the proposed class of distribution are studied. The method of Maximum Likelihood Estimation is used for obtaining the estimates of the model parameters. A member of the family is investigated in detail. Finally an application of the proposed class is illustrated using a real data set.</p> 2020-07-04T00:00:00-04:00 Copyright (c) https://earthlinepublishers.com/index.php/ejms/article/view/205 Enhancing Image Security during Transmission using Residue Number System and k-shuffle 2020-07-08T10:25:41-04:00 Issah Zabsonre Alhassan issahzab@gmail.com Edward Danso Ansong issahzab@gmail.com Gaddafi Abdul-Salaam issahzab@gmail.com Salamudeen Alhassan salamprog@yahoo.com <p>This paper proposes an algorithm that enhances the speed of transmission and secure images that are transmitted over internet or a network. The proposed cryptosystem uses a modified k-shuffling technique to scramble pixels of images and further decomposes them using Residue Number System. Simulations are done using two moduli sets with the modified k-shuffle technique. Analyses of results showed that both simulations could secure images without any loss of information and also the time taken for a complete encryption/decryption process is dependent on the moduli set. Among the chosen moduli sets, the even moduli set optimizes and completes execution using less time as compared to the traditional moduli set. The proposed scheme also showed resistance to statistical attacks (histogram, ciphertext, correlation attacks) and a significant reduction in the size of cipher images which enhances the speed of transmission over network.</p> 2020-07-07T00:00:00-04:00 Copyright (c)