https://cirworld.com/index.php/jam/issue/feed JOURNAL OF ADVANCES IN MATHEMATICS 2019-07-17T11:52:28+00:00 Gurdev Singh editor@rajpub.com Open Journal Systems 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. https://cirworld.com/index.php/jam/article/view/7980 Congruences on *-Simple Type A I-Semigroups 2019-07-17T11:52:16+00:00 Ugochukwu Ndubuisi u_ndubuisi@yahoo.com Asibong-Ibe U.I u_ndubuisi@yahoo.com Udoaka O.G u_ndubuisi@yahoo.com <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> 2019-01-31T04:25:40+00:00 ##submission.copyrightStatement## https://cirworld.com/index.php/jam/article/view/8016 Some Techniques to Compute Multiplicative Inverses for Advanced Encryption Standard 2019-07-17T11:52:14+00:00 Waleed Eltayeb Ahmed wadtayeb@yahoo.com <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> 2019-01-31T04:25:51+00:00 ##submission.copyrightStatement## https://cirworld.com/index.php/jam/article/view/8017 Some modifications on RCAM for getting accurate closed-form approximate solutions of Duffing- and Lienard-type equations 2019-07-17T11:52:11+00:00 Prakash Kumar Das prakashdas.das1@gmail.com Debabrata Singh debabratasingh01@gmail.com Madan Mohan Panja madanpanja2005@yahoo.co.in <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> 2019-01-31T04:26:04+00:00 ##submission.copyrightStatement## https://cirworld.com/index.php/jam/article/view/8018 A Unique Solution of Stochastic Partial Differential Equations with Non-Local Initial condition 2019-07-17T11:52:09+00:00 Mahmoud Mohammed Mostafa El-Borai m_m_elborai@yahoo.com A. Tarek S.A. ahmedsayed2890@gmail.com <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> 2019-01-31T04:26:15+00:00 ##submission.copyrightStatement## https://cirworld.com/index.php/jam/article/view/8053 The Hermite Hadamard Inequality on Hypercuboid 2019-07-17T11:52:07+00:00 Mohammad W Alomari mwomath@gmail.com <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> 2019-01-31T04:26:19+00:00 ##submission.copyrightStatement## https://cirworld.com/index.php/jam/article/view/8057 Solutions of Some Difference Equations Systems and Periodicity 2019-07-17T11:52:04+00:00 Elsayed M. Elsayed emmelsayed@yahoo.com Faris Alzahrani faris.kau@hotmail.com Ibrahim Abbas emmelsayed@yahoo.com N. H. Alotaibi n.h.ob@hotmail.com <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> 2019-01-31T04:26:23+00:00 ##submission.copyrightStatement## https://cirworld.com/index.php/jam/article/view/8088 On the Navier-Stokes problem 2019-07-17T11:52:28+00:00 Alexander G. Ramm ramm@math.ksu.edu <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> 2019-01-31T00:00:00+00:00 ##submission.copyrightStatement## https://cirworld.com/index.php/jam/article/view/8089 Inverse Scattering with Non-Over-Determined Data 2019-07-17T11:52:25+00:00 Alexander G. Ramm ramm@math.ksu.edu <p>The results of the author’s theory of the inverse scattering with non-over-determined&nbsp;data are described.</p> 2019-01-31T00:00:00+00:00 ##submission.copyrightStatement## https://cirworld.com/index.php/jam/article/view/8091 Intransitive Permutation Groups with Bounded Movement Having Maximum Degree 2019-07-17T11:52:23+00:00 Behnam Razzagh b_razzagh@yahoo.com <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> 2019-01-31T00:00:00+00:00 ##submission.copyrightStatement## https://cirworld.com/index.php/jam/article/view/8097 Existence and Uniqueness of Abstract Stochastic Fractional-Order Differential Equation 2019-07-17T11:52:21+00:00 Mahmoud Mohammed Mostafa El-Borai m_m_elborai@yahoo.com A. Tarek S.A. ahmedsayed2890@gmail.com <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> 2019-01-31T00:00:00+00:00 ##submission.copyrightStatement## https://cirworld.com/index.php/jam/article/view/8113 Initial Value Problem for Stochastic Hyprid Hadamard Fractional Differential Equation 2019-07-17T11:52:02+00:00 Mahmoud Mohammed Mostafa El-Borai m_m_elborai@yahoo.com Wagdy G. El-sayed wagdygoma@Alexu.edu.eg A. A. Badr badrzoo@yahoo.com Ahmed Tarek Sayed ahmedsayed2890@gmail.com <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> 2019-02-28T00:00:00+00:00 ##submission.copyrightStatement## https://cirworld.com/index.php/jam/article/view/8152 A New Inexact Non-Interior Continuation Algorithm for Second-Order Cone Programming 2019-07-17T11:51:55+00:00 Liang Fang fangliang3@163.com <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> 2019-02-28T06:21:39+00:00 ##submission.copyrightStatement## https://cirworld.com/index.php/jam/article/view/8167 A way to compute a greatest common divisor in the Galois field (GF (2^n )) 2019-07-17T11:51:57+00:00 Waleed Eltayeb Ahmed wadtayeb@yahoo.com <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> 2019-02-28T00:00:00+00:00 ##submission.copyrightStatement## https://cirworld.com/index.php/jam/article/view/8124 On the Mixed Dirichlet--Farwig biharmonic problem in exterior domains 2019-07-17T11:52:00+00:00 Hovik A. Matevossian hmatevossian@graduate.org <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> 2019-02-28T00:00:00+00:00 ##submission.copyrightStatement## https://cirworld.com/index.php/jam/article/view/8169 Comparison of Halley-Chebyshev Method with Several Nonlinear equation Solving Methods Methods 2019-07-17T11:51:53+00:00 Hamideh Eskandari hamideh_eskandari@yahoo.com <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> 2019-03-29T07:25:51+00:00 ##submission.copyrightStatement## https://cirworld.com/index.php/jam/article/view/7958 For some boundary Value Problems in Distributions 2019-07-17T11:51:51+00:00 Vasko Reckovski vaskorecko@yahoo.com Vesna Manova Erkovikj vesname@pmf.ukim.mk Bedrije Bedjeti bedrije_a@hotmail.com Egzona Iseni egzona.iseni@unt.edu.mk <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> 2019-03-29T08:22:18+00:00 ##submission.copyrightStatement## https://cirworld.com/index.php/jam/article/view/8136 Intransitive Permutation Groups with Bounded Movement Having Maximum Degree 2019-07-17T11:51:48+00:00 Behnam Razzagh b_razzagh@yahoo.com <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> 2019-03-29T08:41:06+00:00 ##submission.copyrightStatement## https://cirworld.com/index.php/jam/article/view/8220 Approximation of The Lower Operator in Nonlinear Differential Games with Non-Fixed Time 2019-07-17T11:51:46+00:00 I.M. Iskanadjiev iskan1960@mail.ru <p>Approximate properties of the lower operator in nonlinear differential games with&nbsp;non-fixed time are studied.</p> 2019-03-29T08:57:29+00:00 ##submission.copyrightStatement## https://cirworld.com/index.php/jam/article/view/8212 The Computational Approach for Recommendation System Based on Tagging Data 2019-07-17T11:51:44+00:00 Kateryna Nesvit nesvit@karazin.ua <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> 2019-03-29T09:44:00+00:00 ##submission.copyrightStatement## https://cirworld.com/index.php/jam/article/view/8217 The Primitive and Imprimitive Soluble Subgroups of GL(4,Pk) 2019-07-17T11:51:41+00:00 Behnam Razzagh b_razzagh@yahoo.com <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> 2019-03-30T00:00:00+00:00 ##submission.copyrightStatement## https://cirworld.com/index.php/jam/article/view/8175 Supra Soft b-Compact and Supra Soft b-Lindle÷F Spaces 2019-07-17T11:51:39+00:00 Jamal Mustafa jjmmrr971@yahoo.com <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> 2019-04-03T10:53:59+00:00 ##submission.copyrightStatement## https://cirworld.com/index.php/jam/article/view/8280 New Numerical Methods for Solving Differential Equations 2019-07-17T11:52:18+00:00 Osama. Y. Ababneh osababneh@zu.edu.jo <p>In this paper, we present new numerical methods to solve ordinary differential equations in both linear and nonlinear cases. we apply Daftardar-Gejji technique on theta-method to derive anew family of numerical method. It is shown that the method may be formulated in an equivalent way as a RungeKutta method. The stability of the methods is analyzed.</p> 2019-01-31T00:00:00+00:00 ##submission.copyrightStatement## https://cirworld.com/index.php/jam/article/view/8249 Influence of Mathematics in The Desertion of Higher Education 2019-07-17T11:51:34+00:00 Johan Ceballos johan.ceballos@udla.edu.ec Scarlett Abalco addis.abalco@udla.edu.ec Daniel González daniel.gonzalez.sanchez@udla.edu.ec Guido Saltos guido.saltos@udla.edu.ec Ximena Suquillo ximena.suquillo@udla.edu.ec Mauricio Angel mauricio.angel@udla.edu.ec <p>In the present work the different models of university desertion are analyzed, identifying the factors that have influence in the continuation of the studies of the students. These factors are essentials to defining what will be understood by university desertion and to elaborate the profile of the deserter. In the case of the Universidad de Las Américas (Quito, Ecuador), the main factors that influence the desertion are corroborated with those that have been established according to the existing bibliography and a descriptive study of these data is carried out, in order to elaborate indicators that allow us to predict the behavior of the student population with a higher risk of dropping out. An analysis is made relating the area of Mathematics and the desertion, seeing how this area influences the possibility of a student dropping out.</p> <p>&nbsp;</p> 2019-04-30T00:00:00+00:00 ##submission.copyrightStatement## https://cirworld.com/index.php/jam/article/view/8228 Aanalytical Solution for Motion Around Radiated Varying Mass Body 2019-07-17T11:51:37+00:00 Marwa Abdullah Bin Humaidan marwahumaidan36@gmail.com M. I. El-Saftawy malsaftawy@kau.edu.sa H. M. Asiri marwahumaidan36@gmail.com <p>In this work we will add the radiation pressure effect of varying mass body to the model of varying mass Hamiltonian function, including Periastron effect. The problem was formulated in terms of Delaunay variables. The solution of the problem was constructed based on Delava – Hansilmair perturbation techniques. Finally we find the first order solution for the problem as time series by calculating the desired order for the D operator and variables.</p> 2019-04-30T00:00:00+00:00 ##submission.copyrightStatement## https://cirworld.com/index.php/jam/article/view/8223 Calculations on a Class of Candidate Solutions for the Distortion Problem on l 2 2019-07-17T11:51:32+00:00 Frank Sanacory sanacoryf@oldwestbury.edu <p>In 1994 E. Odell and Th. Schlumprecht showed that the Hilbert space (` 2 ) was arbitrarily distortable.<br>However, we do not have a defined sequence of norms that would perform this distortion. G. An-<br>droulakis and the author defined a class of norms equivalent to the Hilbert space norm. These norms<br>are candidate sequences of norms that might distort ` 2 . These norms are recursively defined and<br>calculations with these norms are quite difficult. Here we present a tool, a Python program, that<br>calculates the norms defined by G. Androulakis and the author.</p> 2019-05-13T09:53:43+00:00 ##submission.copyrightStatement## https://cirworld.com/index.php/jam/article/view/8299 Third Order Hamiltonian for a Binary System with Varying Masses Including Preastron Effect 2019-07-17T11:51:30+00:00 Doaa Saleh Al-Johani daljohani0005@stu.kau.edu.sa M. I. El-Saftawy malsaftawy@kau.edu.sa <p>This work concerns of the effects of the variation in the masses for two attracting bodies on the orbiter orbital elements. The formulation of the problem was done in different kind of mechanics, Newtonian, Lagrangian, and Hamiltonian. Moreover, constructing the Hamiltonian function of the varying masses of a binary system including, periastron effect, in canonical form in the extended phase space, up to third order of the small parameter ?, to be able to solve using canonical perturbation techniques. Canonical perturbation method based on Lee transformation was developed by Kamel used to remove the short periodic terms from the Hamiltonian to be able to solve the system of equations. The Hamiltonian of the system was transformed to the extended phase space by introducing two variable represents the variation of the masses and their conjugate momenta. Finally, Hamilton's equation of motions was used to drive general formula to calculate the variations in the elements due to the variations in their masses and what so called periastron effects.</p> 2019-05-30T06:12:43+00:00 ##submission.copyrightStatement## https://cirworld.com/index.php/jam/article/view/8301 Spectacular Exponents: A semi modular Approach to Fast Exponentiation 2019-07-17T11:51:27+00:00 Robert Valenza rvalenza@cmc.edu <p>This paper introduces a computational scheme for calculating the exponential <em>b</em><em>w</em>&nbsp;where <em>b</em> and <em>w</em> are positive integers. This two-step method is based on elementary number theory that is used routinely in this and similar contexts, especially the Chinese remainder theorem (CRT), Lagrange’s theorem, and a variation on Garner’s algorithm for inverting the CRT isomorphism. We compare the performance of the new method to the standard fast algorithm and show that for a certain class of exponents it is significantly more efficient as measured by the number of required extended multiplications.&nbsp;&nbsp; &nbsp;</p> 2019-06-04T10:34:01+00:00 ##submission.copyrightStatement## https://cirworld.com/index.php/jam/article/view/8219 Exponentially Varying Load on Rayleigh Beam Resting on Pasternak Foundation. 2019-07-17T11:51:25+00:00 Ahamed Jimoh jimad2007@gmail.com Emmanuel Omeiza Ajoge emmanuelajoge@yahoo.com <p>This paper investigates the dynamic behavior of uniform Rayleigh beam resting on Pasternak foundation and subjected to exponentially varying magnitude moving the load. The solution techniques are based on finite Fourier sine transformed Laplace transformation and convolution theorem. The results show that for a fixed value of axial force, damping coefficient and rotatory inertia, increases in shear modulus and foundation modulus reduces the response amplitude of the dynamical system. It was also found that increases in axial force, rotary inertia, and damping coefficient for fixed values of shear modulus and foundation modulus lead to decreases in the deflection profile of the Rayleigh beam resting on Pasternak foundation. Finally, it was found that the effect of shear modulus is more noticeable that of the foundation modulus.</p> 2019-07-01T00:00:00+00:00 ##submission.copyrightStatement##