JOURNAL OF ADVANCES IN MATHEMATICS Interested in submitting to this journal? We recommend that you review the About the Journal page for the journal's section policies, as well as the Author Guidelines. Authors need to register with the journal prior to submitting or, if already registered, can simply log in and begin the five-step process. en-US <p>Authors retain the copyright of their manuscripts, and all Open Access articles are distributed under the terms of the&nbsp;<a href="">Creative Commons Attribution License</a>, which permits unrestricted use, distribution, and reproduction in any medium, provided that the original work is properly cited.</p> <p>&nbsp;</p> (Gurdev Singh) (Bikramjit Singh) Thu, 31 Jan 2019 00:00:00 +0000 OJS 60 Congruences on *-Simple Type A I-Semigroups <p>This paper obtains a characterisation of the congruences on *-simple type A I-semigroups. The *-locally idempotent-separating congruences, strictly *-locally idempotent-separating congruences and minimum cancellative monoid congruences, are characterised.</p> Ugochukwu Ndubuisi, Asibong-Ibe U.I, Udoaka O.G ##submission.copyrightStatement## Thu, 31 Jan 2019 04:25:40 +0000 Some Techniques to Compute Multiplicative Inverses for Advanced Encryption Standard <p>This paper gives some techniques to compute the set of multiplicative inverses, which uses in the Advanced Encryption Standard (AES).</p> <p>&nbsp;</p> Waleed Eltayeb Ahmed ##submission.copyrightStatement## Thu, 31 Jan 2019 04:25:51 +0000 Some modifications on RCAM for getting accurate closed-form approximate solutions of Duffing- and Lienard-type equations <p>In this work, authors propose some modifications Adomian decomposition method to get some accurate closed form&nbsp;approximate or exact solutions of Duffing- and Li´enard-type nonlinear ordinary differential equations.<br>Results obtained by the revised scheme have been exploited subsequently to derive constraints among parameters&nbsp;to get the solutions to be bounded. The present scheme appears to be efficient and may be regarded as&nbsp;the confluence of apparently different methods for getting exact solutions for a variety of nonlinear ordinary&nbsp;differential equations appearing as mathematical models in several physical processes.</p> Prakash Kumar Das, Debabrata Singh, Madan Mohan Panja ##submission.copyrightStatement## Thu, 31 Jan 2019 04:26:04 +0000 A Unique Solution of Stochastic Partial Differential Equations with Non-Local Initial condition <p>In this paper, we shall discuss the uniqueness ”pathwise uniqueness”&nbsp;of the solutions of stochastic partial differential equations (SPDEs) with&nbsp;non-local initial condition,<br><img src="/public/site/images/mel-borai/222.JPG"><br>We shall use the Yamada-Watanabe condition for ”pathwise uniqueness”&nbsp;of the solutions of the stochastic differential equation; this condition is&nbsp;weaker than the usual Lipschitz condition. The proof is based on Bihari’s<br>inequality.</p> Mahmoud Mohammed Mostafa El-Borai, A. Tarek S.A. ##submission.copyrightStatement## Thu, 31 Jan 2019 04:26:15 +0000 The Hermite Hadamard Inequality on Hypercuboid <p>Given any a := (a1; a2,... ; an) and b := (b1; b2;... ; bn) in Rn.&nbsp;The n-fold convex function dened on [a; b], a; b 2 Rn with a &lt; b is a convex&nbsp;function in each variable separately. In this work we prove an inequality of&nbsp;Hermite-Hadamard type for n-fold convex functions. Namely, we establish the&nbsp;inequality</p> <p><img src="/public/site/images/editor/Untitled_11112.png"></p> <p><img src="/public/site/images/editor/Untitled_32.png"></p> Mohammad W Alomari ##submission.copyrightStatement## Thu, 31 Jan 2019 04:26:19 +0000 Solutions of Some Difference Equations Systems and Periodicity <p>In this article, analysis and investigation have been conducted on the periodic&nbsp;nature as well as the type of the solutions of the subsequent schemes of&nbsp;rational difference equations</p> <p><img src="/public/site/images/editor/Untitled1.png" width="336" height="58"><br>with a nonzero real numbers initial conditions.</p> Elsayed M. Elsayed, Faris Alzahrani, Ibrahim Abbas, N. H. Alotaibi ##submission.copyrightStatement## Thu, 31 Jan 2019 04:26:23 +0000 On the Navier-Stokes problem <p>One of the millennium problems is discussed. The results of the author’s solution to&nbsp;this problem are explained. The problem discussed is the Navier-Stokes problem in the&nbsp;whole space.</p> Alexander G. Ramm ##submission.copyrightStatement## Thu, 31 Jan 2019 00:00:00 +0000 Inverse Scattering with Non-Over-Determined Data <p>The results of the author’s theory of the inverse scattering with non-over-determined&nbsp;data are described.</p> Alexander G. Ramm ##submission.copyrightStatement## Thu, 31 Jan 2019 00:00:00 +0000 Intransitive Permutation Groups with Bounded Movement Having Maximum Degree <p>Let G be a permutation group on a set <img src="/public/site/images/editor/CaptureO.PNG">with no fixed points&nbsp;in <img src="/public/site/images/editor/CaptureO1.PNG">and let m be a positive integer. If for each subset <img src="/public/site/images/editor/Capture_ell.PNG">of&nbsp;<img src="/public/site/images/editor/CaptureO2.PNG"> the&nbsp;size&nbsp;<img src="/public/site/images/editor/Capture_ell2.PNG"> is bounded, for <img src="/public/site/images/editor/Captureg.PNG">, we define the movement of g as the&nbsp;max&nbsp;<img src="/public/site/images/editor/Capture_ell21.PNG"> over all subsets <img src="/public/site/images/editor/Capture_ell1.PNG">of <img src="/public/site/images/editor/CaptureO3.PNG">. In this paper we classified all of&nbsp;permutation groups on set <img src="/public/site/images/editor/CaptureO4.PNG">of size 3m + 1 with 2 orbits such that&nbsp;has movement m .&nbsp;2000 AMS classification subjects: 20B25</p> Behnam Razzagh ##submission.copyrightStatement## Thu, 31 Jan 2019 00:00:00 +0000 Existence and Uniqueness of Abstract Stochastic Fractional-Order Differential Equation <p style="-qt-block-indent: 0; text-indent: 0px; margin: 0px;">In this paper, the existence and uniqueness about the solution for a class of abstract stochastic fractional-order differential equations</p> <p style="-qt-block-indent: 0; text-indent: 0px; margin: 0px;">&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;<img src="/public/site/images/editor/Capture_new1.PNG"></p> <p style="-qt-block-indent: 0; text-indent: 0px; margin: 0px;">where&nbsp;<img src="/public/site/images/editor/Capture_new2.PNG"> in and&nbsp;<img src="/public/site/images/editor/Capture_new31.PNG"> are given functions, are investigated, where the fractional derivative is described in Caputo sense. The fractional calculus, stochastic analysis techniques and the standard $Picard's$ iteration method are used to obtain the required.</p> Mahmoud Mohammed Mostafa El-Borai, A. Tarek S.A. ##submission.copyrightStatement## Thu, 31 Jan 2019 00:00:00 +0000 Initial Value Problem for Stochastic Hyprid Hadamard Fractional Differential Equation <p>In this paper, we discuss the existence of solutions for a stochastic initial value problem of Hyprid fractional dierential equations of Hadamard&nbsp;type given by&nbsp;</p> <p>&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;<img src="/public/site/images/editor/Capture_jam.PNG"></p> <p>where HD is the Hadamard fractional derivative, <img src="/public/site/images/editor/Capturejam2.PNG"><img src="/public/site/images/editor/Capturejam3.PNG">and <img src="/public/site/images/editor/Capture111.PNG">is the Hadamard fractional&nbsp;integral and <img src="/public/site/images/editor/Capture.PNG">be such that <img src="/public/site/images/editor/Capture222.PNG">are investigated. The&nbsp;fractional calculus and stochastic analysis techniques are used to obtain&nbsp;the required results.&nbsp;</p> Mahmoud Mohammed Mostafa El-Borai, Wagdy G. El-sayed, A. A. Badr, Ahmed Tarek Sayed ##submission.copyrightStatement## Thu, 28 Feb 2019 00:00:00 +0000 A New Inexact Non-Interior Continuation Algorithm for Second-Order Cone Programming <p>Second-order cone programming has received considerable attention in the past decades because of its wide range of applications. Non-interior continuation method is one of the most popular and efficient methods for solving second-order cone programming partially due to its superior numerical performances. In this paper, a new smoothing form of the well-known Fischer-Burmeister function is given. Based on the new smoothing function, an inexact non-interior continuation algorithm is proposed. Attractively, the new algorithm can start from an arbitrary point, and it solves only one system of linear equations inexactly and performs only one line search at each iteration. Moreover, under a mild assumption, the new algorithm has a globally linear and locally Q-quadratical convergence. Finally, some preliminary numerical results are reported which show the effectiveness of the presented algorithm.</p> Liang Fang ##submission.copyrightStatement## Thu, 28 Feb 2019 06:21:39 +0000 A way to compute a greatest common divisor in the Galois field (GF (2^n )) <p>This paper presents how the steps that used to determine a multiplicative inverse by method based on the Euclidean algorithm, can be used to find a greatest common divisor for polynomials in the Galois field (2^n ).</p> Waleed Eltayeb Ahmed ##submission.copyrightStatement## Thu, 28 Feb 2019 00:00:00 +0000 On the Mixed Dirichlet--Farwig biharmonic problem in exterior domains <p>We study the properties of generalized solutions in unbounded domains and the asymptotic behavior of solutions of elliptic boundary value problems at infinity. Moreover, we study the unique solvability of the mixed Dirichlet--Farwig biharmonic problem in the exterior of a compact set under the assumption that generalized solutions of these problems has a bounded Dirichlet integral with weight $|x|^a$. Admitting different boundary conditions, we used the variation principle and depending on the value of the parameter $a$, we obtained uniqueness (non-uniqueness) theorems of the problem or present exact formulas for the dimension of the space of solutions.</p> Hovik A. Matevossian ##submission.copyrightStatement## Thu, 28 Feb 2019 00:00:00 +0000 Comparison of Halley-Chebyshev Method with Several Nonlinear equation Solving Methods Methods <p>In this paper, we present one of the most important numerical analysis problems that we find in the roots of the nonlinear equation. In numerical analysis and numerical computing, there are many methods that we can approximate the roots of this equation. We present here several different methods, such as Halley's method, Chebyshev's method, Newton's method, and other new methods presented in papers and journals, and compare them. In the end, we get a good and attractive result.</p> Hamideh Eskandari ##submission.copyrightStatement## Fri, 29 Mar 2019 07:25:51 +0000 For some boundary Value Problems in Distributions <p>In this paper we give a result concerning convergent sequences of functions that give convergent sequence of distributions in &nbsp;and find the analytic representation of the distribution obtained by their boundary values. Also, we present two examples.</p> Vasko Reckovski, Vesna Manova Erkovikj, Bedrije Bedjeti, Egzona Iseni ##submission.copyrightStatement## Fri, 29 Mar 2019 08:22:18 +0000 Intransitive Permutation Groups with Bounded Movement Having Maximum Degree <p>Let G be a permutation group on a set with<img src="/public/site/images/editor/Untitled4.png" width="15" height="14">no fixed points&nbsp;in <img src="/public/site/images/editor/Untitled5.png" width="17" height="15">and let m be a positive integer. If for each subset T of <img src="/public/site/images/editor/Untitled6.png" width="18" height="16">the&nbsp;&nbsp;size |T<sup>g</sup>\T| is bounded, for gEG, we define the movement of g as the&nbsp;max|T<sup>g</sup>\T| over all subsets T of <img src="/public/site/images/editor/Untitled6.png" width="18" height="16"> . In this paper we classified all of&nbsp;permutation groups on set&nbsp;<img src="/public/site/images/editor/Untitled6.png" width="18" height="16">&nbsp; &nbsp;of size 3m + 1 with 2 orbits such that&nbsp;has movement m .&nbsp;2000 AMS classification subjects: 20B25</p> Behnam Razzagh ##submission.copyrightStatement## Fri, 29 Mar 2019 08:41:06 +0000 Approximation of The Lower Operator in Nonlinear Differential Games with Non-Fixed Time <p>Approximate properties of the lower operator in nonlinear differential games with&nbsp;non-fixed time are studied.</p> I.M. Iskanadjiev ##submission.copyrightStatement## Fri, 29 Mar 2019 08:57:29 +0000 The Computational Approach for Recommendation System Based on Tagging Data <p>Recommendation approaches like a platform for learning algorithm. We can use some predicted values to put them in the data pipeline forlearning. There is a hard nuance of how to calculate the similarity measurewhen we have a small number of actions at all, its not a new user or item to use cold start methods, we just have not enough quantity to say it may be interpreted like regularity. The frequency of tags what we would have fromusers will have a huge impact to predict his future taste. The article describes created a computational approach using as explicit and as implicit feedbacks from users and evaluates tags by Jaccard distance to resolve this issue. To compare results with existed numerical methods there is a comparison table that shows the high quality of the proposed approach.</p> Kateryna Nesvit ##submission.copyrightStatement## Fri, 29 Mar 2019 09:44:00 +0000 The Primitive and Imprimitive Soluble Subgroups of GL(4,Pk) <p>In this paper we will determined all of the primitive and imprimitive Soluble Subgroups of GL(4,p<sup>k</sup>). It turns out that the number of types of the irreducible Soluble Subgroups in GL(4,p<sup>k</sup>)are 10 types and are M<sub>i</sub>,i=1,…,10. moreover we find these subgroups.</p> Behnam Razzagh ##submission.copyrightStatement## Sat, 30 Mar 2019 00:00:00 +0000 Supra Soft b-Compact and Supra Soft b-Lindle÷F Spaces <p>The purpose of this paper is to introduce and study the concepts of supra soft&nbsp;b-compact and supra soft b-Lindelˆf spaces. Also we study several of their properties and&nbsp;characterizations in details. Furthermore, the invariance of these kinds of spaces under&nbsp;some types of supra soft mappings and their hereditary properties are also investigated</p> Jamal Mustafa ##submission.copyrightStatement## Wed, 03 Apr 2019 10:53:59 +0000