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  Subjects -> MATHEMATICS (Total: 885 journals)
    - APPLIED MATHEMATICS (71 journals)
    - GEOMETRY AND TOPOLOGY (20 journals)
    - MATHEMATICS (656 journals)
    - MATHEMATICS (GENERAL) (42 journals)
    - NUMERICAL ANALYSIS (19 journals)
    - PROBABILITIES AND MATH STATISTICS (77 journals)

MATHEMATICS (656 journals)                  1 2 3 4 | Last

Showing 1 - 200 of 538 Journals sorted alphabetically
Abakós     Open Access   (Followers: 3)
Abhandlungen aus dem Mathematischen Seminar der Universitat Hamburg     Hybrid Journal   (Followers: 3)
Academic Voices : A Multidisciplinary Journal     Open Access   (Followers: 2)
Accounting Perspectives     Full-text available via subscription   (Followers: 8)
ACM Transactions on Algorithms (TALG)     Hybrid Journal   (Followers: 16)
ACM Transactions on Computational Logic (TOCL)     Hybrid Journal   (Followers: 4)
ACM Transactions on Mathematical Software (TOMS)     Hybrid Journal   (Followers: 6)
ACS Applied Materials & Interfaces     Full-text available via subscription   (Followers: 21)
Acta Applicandae Mathematicae     Hybrid Journal   (Followers: 1)
Acta Mathematica     Hybrid Journal   (Followers: 11)
Acta Mathematica Hungarica     Hybrid Journal   (Followers: 2)
Acta Mathematica Scientia     Full-text available via subscription   (Followers: 5)
Acta Mathematica Sinica, English Series     Hybrid Journal   (Followers: 5)
Acta Mathematica Vietnamica     Hybrid Journal  
Acta Mathematicae Applicatae Sinica, English Series     Hybrid Journal  
Advanced Science Letters     Full-text available via subscription   (Followers: 7)
Advances in Applied Clifford Algebras     Hybrid Journal   (Followers: 3)
Advances in Calculus of Variations     Hybrid Journal   (Followers: 2)
Advances in Catalysis     Full-text available via subscription   (Followers: 5)
Advances in Complex Systems     Hybrid Journal   (Followers: 7)
Advances in Computational Mathematics     Hybrid Journal   (Followers: 15)
Advances in Decision Sciences     Open Access   (Followers: 5)
Advances in Difference Equations     Open Access   (Followers: 1)
Advances in Fixed Point Theory     Open Access   (Followers: 5)
Advances in Geosciences (ADGEO)     Open Access   (Followers: 10)
Advances in Linear Algebra & Matrix Theory     Open Access   (Followers: 2)
Advances in Materials Sciences     Open Access   (Followers: 16)
Advances in Mathematical Physics     Open Access   (Followers: 5)
Advances in Mathematics     Full-text available via subscription   (Followers: 10)
Advances in Numerical Analysis     Open Access   (Followers: 4)
Advances in Operations Research     Open Access   (Followers: 11)
Advances in Porous Media     Full-text available via subscription   (Followers: 4)
Advances in Pure and Applied Mathematics     Hybrid Journal   (Followers: 6)
Advances in Pure Mathematics     Open Access   (Followers: 4)
Advances in Science and Research (ASR)     Open Access   (Followers: 6)
Aequationes Mathematicae     Hybrid Journal   (Followers: 2)
African Journal of Educational Studies in Mathematics and Sciences     Full-text available via subscription   (Followers: 5)
African Journal of Mathematics and Computer Science Research     Open Access   (Followers: 4)
Afrika Matematika     Hybrid Journal   (Followers: 1)
Air, Soil & Water Research     Open Access   (Followers: 7)
AKSIOMA Journal of Mathematics Education     Open Access   (Followers: 1)
Al-Jabar : Jurnal Pendidikan Matematika     Open Access  
Algebra and Logic     Hybrid Journal   (Followers: 4)
Algebra Colloquium     Hybrid Journal   (Followers: 4)
Algebra Universalis     Hybrid Journal   (Followers: 2)
Algorithmic Operations Research     Full-text available via subscription   (Followers: 5)
Algorithms     Open Access   (Followers: 11)
Algorithms Research     Open Access   (Followers: 1)
American Journal of Biostatistics     Open Access   (Followers: 9)
American Journal of Computational and Applied Mathematics     Open Access   (Followers: 4)
American Journal of Mathematical Analysis     Open Access  
American Journal of Mathematics     Full-text available via subscription   (Followers: 7)
American Journal of Operations Research     Open Access   (Followers: 5)
American Mathematical Monthly     Full-text available via subscription   (Followers: 6)
An International Journal of Optimization and Control: Theories & Applications     Open Access   (Followers: 7)
Analele Universitatii Ovidius Constanta - Seria Matematica     Open Access   (Followers: 1)
Analysis     Hybrid Journal   (Followers: 2)
Analysis and Applications     Hybrid Journal   (Followers: 1)
Analysis and Mathematical Physics     Hybrid Journal   (Followers: 3)
Analysis Mathematica     Full-text available via subscription  
Annales Mathematicae Silesianae     Open Access  
Annales mathématiques du Québec     Hybrid Journal   (Followers: 4)
Annales UMCS, Mathematica     Open Access   (Followers: 1)
Annales Universitatis Paedagogicae Cracoviensis. Studia Mathematica     Open Access  
Annali di Matematica Pura ed Applicata     Hybrid Journal   (Followers: 1)
Annals of Combinatorics     Hybrid Journal   (Followers: 3)
Annals of Data Science     Hybrid Journal   (Followers: 9)
Annals of Discrete Mathematics     Full-text available via subscription   (Followers: 6)
Annals of Mathematics     Full-text available via subscription  
Annals of Mathematics and Artificial Intelligence     Hybrid Journal   (Followers: 6)
Annals of Pure and Applied Logic     Open Access   (Followers: 2)
Annals of the Alexandru Ioan Cuza University - Mathematics     Open Access  
Annals of the Institute of Statistical Mathematics     Hybrid Journal   (Followers: 1)
Annals of West University of Timisoara - Mathematics     Open Access  
Annuaire du Collège de France     Open Access   (Followers: 5)
Applicable Algebra in Engineering, Communication and Computing     Hybrid Journal   (Followers: 2)
Applications of Mathematics     Hybrid Journal   (Followers: 1)
Applied Categorical Structures     Hybrid Journal   (Followers: 2)
Applied Computational Intelligence and Soft Computing     Open Access   (Followers: 12)
Applied Mathematics     Open Access   (Followers: 3)
Applied Mathematics     Open Access   (Followers: 4)
Applied Mathematics & Optimization     Hybrid Journal   (Followers: 4)
Applied Mathematics - A Journal of Chinese Universities     Hybrid Journal  
Applied Mathematics Letters     Full-text available via subscription   (Followers: 1)
Applied Mathematics Research eXpress     Hybrid Journal   (Followers: 1)
Applied Network Science     Open Access  
Applied Numerical Mathematics     Hybrid Journal   (Followers: 5)
Applied Spatial Analysis and Policy     Hybrid Journal   (Followers: 4)
Arab Journal of Mathematical Sciences     Open Access   (Followers: 3)
Arabian Journal of Mathematics     Open Access   (Followers: 2)
Archive for Mathematical Logic     Hybrid Journal   (Followers: 1)
Archive of Applied Mechanics     Hybrid Journal   (Followers: 5)
Archive of Numerical Software     Open Access  
Archives of Computational Methods in Engineering     Hybrid Journal   (Followers: 4)
Arkiv för Matematik     Hybrid Journal   (Followers: 1)
Arnold Mathematical Journal     Hybrid Journal   (Followers: 1)
Artificial Satellites : The Journal of Space Research Centre of Polish Academy of Sciences     Open Access   (Followers: 19)
Asia-Pacific Journal of Operational Research     Hybrid Journal   (Followers: 3)
Asian Journal of Algebra     Open Access   (Followers: 1)
Asian Journal of Current Engineering & Maths     Open Access  
Asian-European Journal of Mathematics     Hybrid Journal   (Followers: 2)
Australian Mathematics Teacher, The     Full-text available via subscription   (Followers: 7)
Australian Primary Mathematics Classroom     Full-text available via subscription   (Followers: 2)
Australian Senior Mathematics Journal     Full-text available via subscription   (Followers: 1)
Automatic Documentation and Mathematical Linguistics     Hybrid Journal   (Followers: 5)
Axioms     Open Access  
Baltic International Yearbook of Cognition, Logic and Communication     Open Access  
Basin Research     Hybrid Journal   (Followers: 5)
BIBECHANA     Open Access  
BIT Numerical Mathematics     Hybrid Journal  
BoEM - Boletim online de Educação Matemática     Open Access  
Boletim Cearense de Educação e História da Matemática     Open Access  
Boletim de Educação Matemática     Open Access  
Boletín de la Sociedad Matemática Mexicana     Hybrid Journal  
Bollettino dell'Unione Matematica Italiana     Full-text available via subscription   (Followers: 1)
British Journal of Mathematical and Statistical Psychology     Full-text available via subscription   (Followers: 20)
Bruno Pini Mathematical Analysis Seminar     Open Access  
Buletinul Academiei de Stiinte a Republicii Moldova. Matematica     Open Access   (Followers: 7)
Bulletin des Sciences Mathamatiques     Full-text available via subscription   (Followers: 4)
Bulletin of Dnipropetrovsk University. Series : Communications in Mathematical Modeling and Differential Equations Theory     Open Access   (Followers: 1)
Bulletin of Mathematical Sciences     Open Access   (Followers: 1)
Bulletin of the Brazilian Mathematical Society, New Series     Hybrid Journal  
Bulletin of the London Mathematical Society     Hybrid Journal   (Followers: 3)
Bulletin of the Malaysian Mathematical Sciences Society     Hybrid Journal  
Calculus of Variations and Partial Differential Equations     Hybrid Journal  
Canadian Journal of Science, Mathematics and Technology Education     Hybrid Journal   (Followers: 18)
Carpathian Mathematical Publications     Open Access   (Followers: 1)
Catalysis in Industry     Hybrid Journal   (Followers: 1)
CEAS Space Journal     Hybrid Journal  
CHANCE     Hybrid Journal   (Followers: 5)
Chaos, Solitons & Fractals     Hybrid Journal   (Followers: 3)
ChemSusChem     Hybrid Journal   (Followers: 7)
Chinese Annals of Mathematics, Series B     Hybrid Journal  
Chinese Journal of Catalysis     Full-text available via subscription   (Followers: 2)
Chinese Journal of Mathematics     Open Access  
Clean Air Journal     Full-text available via subscription   (Followers: 2)
Cogent Mathematics     Open Access   (Followers: 2)
Cognitive Computation     Hybrid Journal   (Followers: 4)
Collectanea Mathematica     Hybrid Journal  
College Mathematics Journal     Full-text available via subscription   (Followers: 3)
COMBINATORICA     Hybrid Journal  
Combustion Theory and Modelling     Hybrid Journal   (Followers: 13)
Commentarii Mathematici Helvetici     Hybrid Journal   (Followers: 1)
Communications in Contemporary Mathematics     Hybrid Journal  
Communications in Mathematical Physics     Hybrid Journal   (Followers: 1)
Communications On Pure & Applied Mathematics     Hybrid Journal   (Followers: 3)
Complex Analysis and its Synergies     Open Access   (Followers: 2)
Complex Variables and Elliptic Equations: An International Journal     Hybrid Journal  
Complexus     Full-text available via subscription  
Composite Materials Series     Full-text available via subscription   (Followers: 9)
Comptes Rendus Mathematique     Full-text available via subscription   (Followers: 1)
Computational and Applied Mathematics     Hybrid Journal   (Followers: 2)
Computational and Mathematical Methods in Medicine     Open Access   (Followers: 2)
Computational and Mathematical Organization Theory     Hybrid Journal   (Followers: 2)
Computational Complexity     Hybrid Journal   (Followers: 4)
Computational Mathematics and Modeling     Hybrid Journal   (Followers: 8)
Computational Mechanics     Hybrid Journal   (Followers: 4)
Computational Methods and Function Theory     Hybrid Journal  
Computational Optimization and Applications     Hybrid Journal   (Followers: 7)
Computers & Mathematics with Applications     Full-text available via subscription   (Followers: 5)
Concrete Operators     Open Access   (Followers: 4)
Confluentes Mathematici     Hybrid Journal  
COSMOS     Hybrid Journal  
Cryptography and Communications     Hybrid Journal   (Followers: 14)
Cuadernos de Investigación y Formación en Educación Matemática     Open Access  
Cubo. A Mathematical Journal     Open Access  
Czechoslovak Mathematical Journal     Hybrid Journal   (Followers: 1)
Demographic Research     Open Access   (Followers: 11)
Demonstratio Mathematica     Open Access  
Dependence Modeling     Open Access  
Design Journal : An International Journal for All Aspects of Design     Hybrid Journal   (Followers: 28)
Developments in Clay Science     Full-text available via subscription   (Followers: 1)
Developments in Mineral Processing     Full-text available via subscription   (Followers: 3)
Dhaka University Journal of Science     Open Access  
Differential Equations and Dynamical Systems     Hybrid Journal   (Followers: 2)
Discrete Mathematics     Hybrid Journal   (Followers: 8)
Discrete Mathematics & Theoretical Computer Science     Open Access  
Discrete Mathematics, Algorithms and Applications     Hybrid Journal   (Followers: 2)
Discussiones Mathematicae Graph Theory     Open Access   (Followers: 1)
Dnipropetrovsk University Mathematics Bulletin     Open Access  
Doklady Mathematics     Hybrid Journal  
Duke Mathematical Journal     Full-text available via subscription   (Followers: 1)
Edited Series on Advances in Nonlinear Science and Complexity     Full-text available via subscription  
Electronic Journal of Graph Theory and Applications     Open Access   (Followers: 2)
Electronic Notes in Discrete Mathematics     Full-text available via subscription   (Followers: 2)
Elemente der Mathematik     Full-text available via subscription   (Followers: 3)
Energy for Sustainable Development     Hybrid Journal   (Followers: 9)
Enseñanza de las Ciencias : Revista de Investigación y Experiencias Didácticas     Open Access  
Ensino da Matemática em Debate     Open Access  
Entropy     Open Access   (Followers: 5)
ESAIM: Control Optimisation and Calculus of Variations     Full-text available via subscription   (Followers: 1)
European Journal of Combinatorics     Full-text available via subscription   (Followers: 5)
European Journal of Mathematics     Hybrid Journal   (Followers: 1)
European Scientific Journal     Open Access   (Followers: 2)
Experimental Mathematics     Hybrid Journal   (Followers: 4)
Expositiones Mathematicae     Hybrid Journal   (Followers: 2)
Facta Universitatis, Series : Mathematics and Informatics     Open Access  
Fasciculi Mathematici     Open Access  
Finite Fields and Their Applications     Full-text available via subscription   (Followers: 4)
Fixed Point Theory and Applications     Open Access   (Followers: 1)

        1 2 3 4 | Last

Journal Cover Arab Journal of Mathematical Sciences
  [3 followers]  Follow
    
  This is an Open Access Journal Open Access journal
   ISSN (Print) 1319-5166
   Published by Elsevier Homepage  [3044 journals]
  • Asymptotic behaviour of a suspension bridge problem

    • Authors: Soh Edwin Mukiawa
      Abstract: Publication date: Available online 31 July 2017
      Source:Arab Journal of Mathematical Sciences
      Author(s): Soh Edwin Mukiawa
      In this paper, we consider a fourth-order viscoelastic plate equation with infinite memory, and with partially hinged boundary conditions. We investigate the asymptotic behaviour of solutions. This present paper improves earlier results in the literature and allow an extended range of relaxation functions.

      PubDate: 2017-08-04T02:49:44Z
      DOI: 10.1016/j.ajmsc.2017.07.002
       
  • Oscillation criteria for a class of third order damped differential
           equations

    • Authors: Osama Moaaz; Elmetwally M. Elabbasy; Ebtesam Shaaban
      Abstract: Publication date: Available online 27 July 2017
      Source:Arab Journal of Mathematical Sciences
      Author(s): Osama Moaaz, Elmetwally M. Elabbasy, Ebtesam Shaaban
      The present study concerns the oscillation of a class of third-order nonlinear delay differential equations with middle term. We offer a new description of oscillation of the third-order equations in terms of oscillation of a related well studied second-order linear differential equation without damping. By using the integral averaging technique, we establish new oscillation results for this equation. Some examples are provided to illustrate the main results.

      PubDate: 2017-08-04T02:49:44Z
      DOI: 10.1016/j.ajmsc.2017.07.001
       
  • On Fibonacci and Lucas sequences modulo a prime and primality testing

    • Authors: Dorin Andrica; Vlad Crişan; Fawzi Al-Thukair
      Abstract: Publication date: Available online 24 June 2017
      Source:Arab Journal of Mathematical Sciences
      Author(s): Dorin Andrica, Vlad Crişan, Fawzi Al-Thukair
      We prove two properties regarding the Fibonacci and Lucas Sequences modulo a prime and use these to generalize the well-known property p ∣ F p − p 5 . We then discuss these results in the context of primality testing.

      PubDate: 2017-07-03T20:43:05Z
      DOI: 10.1016/j.ajmsc.2017.06.002
       
  • On the bi-harmonic maps with potential

    • Authors: A. Mohammed Cherif; M. Djaa
      Abstract: Publication date: Available online 15 June 2017
      Source:Arab Journal of Mathematical Sciences
      Author(s): A. Mohammed Cherif, M. Djaa
      In this note we characterize the harmonic maps and biharmonic maps with potential, and we prove that every biharmonic map with potential on a complete manifold satisfying some conditions is a harmonic map with potential.

      PubDate: 2017-06-17T18:14:12Z
      DOI: 10.1016/j.ajmsc.2017.06.001
       
  • Potential eventual positivity of sign patterns with the underlying broom
           graph

    • Authors: Ber-Lin Yu; Jie Cui; Hongzhuan Wang; Xingyong Xie
      Abstract: Publication date: Available online 30 November 2016
      Source:Arab Journal of Mathematical Sciences
      Author(s): Ber-Lin Yu, Jie Cui, Hongzhuan Wang, Xingyong Xie
      A sign pattern is a matrix whose entries belong to the set { + , − , 0 } . An n -by- n sign pattern A is said to allow an eventually positive matrix or be potentially eventually positive if there exist at least one real matrix A with the same sign pattern as A and a positive integer k 0 such that A k > 0 for all k ≥ k 0 . Identifying the necessary and sufficient conditions for an n -by- n sign pattern to be potentially eventually positive, and classifying the n -by- n sign patterns that allow an eventually positive matrix were posed as two open problems by Berman, Catral, Dealba, et al. In this article, we focus on the potential eventual positivity of a collection of the n -by- n tree sign patterns A n , 4 whose underlying graph G ( A n , 4 ) consists of a path P with 4 vertices, together with ( n − 4 ) pendent vertices all adjacent to the same end vertex of P . Some necessary conditions for the n -by- n tree sign patterns A n , 4 to be potentially eventually positive are established. All the minimal subpatterns of A n , 4 that allow an eventually positive matrix are identified. Consequently, all the potentially eventually positive subpatterns of A n , 4 are classified.

      PubDate: 2016-12-04T01:59:30Z
      DOI: 10.1016/j.ajmsc.2016.11.002
       
  • Hermite-Hadamard-Fejer type inequalities for p-convex functions

    • Authors: Mehmet Kunt
      Abstract: Publication date: Available online 17 November 2016
      Source:Arab Journal of Mathematical Sciences
      Author(s): Mehmet Kunt, İmdat İşcan
      In this paper, firstly, Hermite-Hadamard-Fejer type inequalities for p -convex functions are built. Secondly, an integral identity and some Hermite-Hadamard-Fejer type integral inequalities for p -convex functions are obtained. Finally, some Hermite-Hadamard and Hermite-Hadamard-Fejer inequalities for convex, harmonically convex and p -convex functions are given. Some results presented here for p -convex functions provide extensions of others given in earlier works for convex and harmonically convex and p -convex functions.

      PubDate: 2016-11-19T18:02:16Z
       
  • Local convergence of a fifth convergence order method in Banach space

    • Authors: Ioannis K. Argyros; Santhosh George
      Abstract: Publication date: Available online 12 November 2016
      Source:Arab Journal of Mathematical Sciences
      Author(s): Ioannis K. Argyros, Santhosh George
      We provide a local convergence analysis for a fifth convergence order method to find a solution of a nonlinear equation in a Banach space. In our paper the sufficient convergence conditions involve only hypotheses on the first Fréchet-derivative. Previous works use conditions reaching up to the fourth Fréchet-derivative. This way, the applicability of these methods is extended under weaker conditions and less computational cost for the Lipschitz constants appearing in the convergence analysis. Numerical examples are also given in this paper.

      PubDate: 2016-11-13T05:55:20Z
      DOI: 10.1016/j.ajmsc.2016.10.002
       
  • On the study of Brück conjecture and some non-linear complex
           differential equations

    • Authors: Dilip Ch.; Pramanik Manab Biswas Rajib Mandal
      Abstract: Publication date: Available online 2 November 2016
      Source:Arab Journal of Mathematical Sciences
      Author(s): Dilip Ch. Pramanik, Manab Biswas, Rajib Mandal
      In this paper, we prove the following result: Let f ( z ) and α ( z ) be two non-constant entire functions satisfying σ ( α ) < μ ( f ) and P ( z ) be a polynomial. If f isa non-constant entire solution of the differential equation M [ f ] + β ( z ) − α ( z ) = ( f γ M − α ( z ) ) e P ( z ) , where β ( z ) is an entire function satisfying σ ( β ) < μ ( f ) . Then σ 2 ( f ) = deg P . Our result generalizes the results due to Gundersen and Yang, Chang and Zhu and Li and Cao.

      PubDate: 2016-11-06T04:38:36Z
       
  • On the genus of nil-graph of ideals of commutative rings

    • Authors: T. Tamizh Chelvam; K. Selvakumar; P. Subbulakshmi
      Abstract: Publication date: Available online 2 October 2016
      Source:Arab Journal of Mathematical Sciences
      Author(s): T. Tamizh Chelvam, K. Selvakumar, P. Subbulakshmi
      Let R be a commutative ring with identity and let Nil ( R ) be the ideal of all nilpotent elements of R . Let I ( R ) = { I : I is a non-trivial ideal of R and there exists a non-trivial ideal J such that I J ⊆ Nil ( R ) } . The nil-graph of ideals of R is defined as the simple undirected graph A G N ( R ) whose vertex set is I ( R ) and two distinct vertices I and J are adjacent if and only if I J ⊆ Nil ( R ) . In this paper, we study the planarity and genus of A G N ( R ) . In particular, we have characterized all commutative Artin rings R for which the genus of A G N ( R ) is either zero or one.

      PubDate: 2016-10-09T01:22:07Z
      DOI: 10.1016/j.ajmsc.2016.09.004
       
  • On the equivalence of two curvature conditions for Lorentzian
           hypersurfaces

    • Authors: Mohammed Guediri; Norah Alshehri
      Abstract: Publication date: Available online 24 September 2016
      Source:Arab Journal of Mathematical Sciences
      Author(s): Mohammed Guediri, Norah Alshehri
      Let n ≥ 3 . We show that semi-symmetry and Ricci-semisymmetry conditions are equivalent for any n -dimensional Lorentzian hypersurface in a Lorentzian space form with nonzero curvature. We also show that these curvature conditions are equivalent for any n -dimensional Lorentzian isoparametric hypersurface in Minkowski space R 1 n + 1 , and we construct an example of a Ricci-semisymmetric 5 -dimensional Lorentzian hypersurface in R 1 6 which is not semi-symmetric.

      PubDate: 2016-09-25T08:59:26Z
      DOI: 10.1016/j.ajmsc.2016.09.001
       
  • Statistical properties of an estimator for the mean function of a compound
           cyclic Poisson process in the presence of linear trend

    • Authors: Bonno Andri Wibowo; I Wayan Mangku; Siswadi
      Abstract: Publication date: Available online 22 September 2016
      Source:Arab Journal of Mathematical Sciences
      Author(s): Bonno Andri Wibowo, I. Wayan Mangku, Siswadi
      The problem of estimating the mean function of a compound cyclic Poisson process with linear trend is considered. An estimator of this mean function is constructed and investigated. The cyclic component of intensity function of this process is not assumed to have any parametric form, but its period is assumed to be known. The slope of the linear trend is assumed to be positive, but its value is unknown. Moreover, we consider the case when there is only a single realization of the Poisson process is observed in a bounded interval. Asymptotic bias and variance of the proposed estimator are computed, when the size of interval indefinitely expands.

      PubDate: 2016-09-25T08:59:26Z
      DOI: 10.1016/j.ajmsc.2016.08.004
       
  • Characterizing spheres by an immersion in Euclidean spaces

    • Authors: Sharief Deshmukh; Ibrahim Al-Dayel
      Abstract: Publication date: Available online 22 September 2016
      Source:Arab Journal of Mathematical Sciences
      Author(s): Sharief Deshmukh, Ibrahim Al-Dayel
      In this paper we study compact immersed orientable hypersurfaces in the Euclidean space R n + 1 and show that suitable restrictions on the tangential and normal components of the immersion give different characterizations of the spheres.

      PubDate: 2016-09-25T08:59:26Z
      DOI: 10.1016/j.ajmsc.2016.09.002
       
  • Geometry of conformal vector fields

    • Authors: Sharief Deshmukh
      Abstract: Publication date: Available online 22 September 2016
      Source:Arab Journal of Mathematical Sciences
      Author(s): Sharief Deshmukh
      It is well known that the Euclidean space ( R n , 〈 , 〉 ) , the n -sphere S n ( c ) of constant curvature c and Euclidean complex space form ( C n , J , 〈 , 〉 ) are examples of spaces admitting conformal vector fields and therefore conformal vector fields are used in obtaining characterizations of these spaces. In this article, we study the conformal vector fields on a Riemannian manifold and present the existing results as well as some new results on the characterization of these spaces. Taking clue from the analytic vector fields on a complex manifold, we define φ -analytic conformal vector fields on a Riemannian manifold and study their properties as well as obtain characterizations of the Euclidean space ( R n , 〈 , 〉 ) and the n -sphere S n ( c ) of constant curvature c using these vector fields.

      PubDate: 2016-09-25T08:59:26Z
      DOI: 10.1016/j.ajmsc.2016.09.003
       
  • A survey on the geometry of production models in economics

    • Authors: Alina-Daniela Vîlcu; Gabriel-Eduard Vîlcu
      Abstract: Publication date: Available online 24 August 2016
      Source:Arab Journal of Mathematical Sciences
      Author(s): Alina-Daniela Vîlcu, Gabriel-Eduard Vîlcu
      In this article we survey selected recent results on the geometry of production models, focussing on the main production functions that are usually analyzed in economics, namely homogeneous, homothetic, quasi-sum and quasi-product production functions.

      PubDate: 2016-08-27T10:55:34Z
      DOI: 10.1016/j.ajmsc.2016.08.003
       
  • On connections on principal bundles

    • Authors: Indranil Biswas
      Abstract: Publication date: Available online 24 August 2016
      Source:Arab Journal of Mathematical Sciences
      Author(s): Indranil Biswas
      A new construction of a universal connection was given in Biswas, Hurtubise & Stasheff (2012). The main aim here is to explain this construction. A theorem of Atiyah and Weil says that a holomorphic vector bundle E over a compact Riemann surface admits a holomorphic connection if and only if the degree of every direct summand of E is degree. In Azad & Biswas (2002), this criterion was generalized to principal bundles on compact Riemann surfaces. This criterion for principal bundles is also explained.

      PubDate: 2016-08-27T10:55:34Z
      DOI: 10.1016/j.ajmsc.2016.08.002
       
  • Topics in differential geometry associated with position vector fields on
           Euclidean submanifolds

    • Authors: Bang-Yen Chen
      Abstract: Publication date: Available online 13 August 2016
      Source:Arab Journal of Mathematical Sciences
      Author(s): Bang-Yen Chen
      Position vector field is the most elementary and natural geometric object on a Euclidean submanifold. The purpose of this article is to survey six research topics in differential geometry in which the position vector field plays very important roles. In this article we also explain the relationship between position vector fields and mechanics, dynamics, and D’Arcy Thompson’s law of natural growth in biology.

      PubDate: 2016-08-17T05:08:50Z
      DOI: 10.1016/j.ajmsc.2016.08.001
       
  • Symmetric duality for left and right Riemann–Liouville and Caputo
           fractional differences

    • Authors: Thabet Abdeljawad; Delfim F.M. Torres
      Abstract: Publication date: Available online 18 July 2016
      Source:Arab Journal of Mathematical Sciences
      Author(s): Thabet Abdeljawad, Delfim F.M. Torres
      A discrete version of the symmetric duality of Caputo–Torres, to relate left and right Riemann–Liouville and Caputo fractional differences, is considered. As a corollary, we provide an evidence to the fact that in case of right fractional differences, one has to mix between nabla and delta operators. As an application, we derive right fractional summation by parts formulas and left fractional difference Euler–Lagrange equations for discrete fractional variational problems whose Lagrangians depend on right fractional differences.

      PubDate: 2016-07-26T21:46:13Z
      DOI: 10.1016/j.ajmsc.2016.07.001
       
  • On the equation Vn=wx2∓1

    • Authors: Refik Keskin
      Abstract: Publication date: Available online 30 June 2016
      Source:Arab Journal of Mathematical Sciences
      Author(s): Ümmügülsüm Öğüt, Refik Keskin
      Let P ≥ 3 be an integer and ( V n ) denote Lucas sequence of the second kind defined by V 0 = 2 , V 1 = P , and V n + 1 = P V n − V n − 1 for n ≥ 1 . In this study, when P is odd and w ∈ { 10 , 14 , 15 , 21 , 30 , 35 , 42 , 70 , 210 } , we solved the equation V n = w x 2 ∓ 1 . We showed that only V 1 can be of the form w x 2 + 1 and only V 1 or V 2 can be of the form w x 2 − 1 .

      PubDate: 2016-07-03T11:14:03Z
       
  • Some explicit and recursive formulas of the large and little Schröder
           numbers

    • Authors: Feng Qi; Bai-Ni Guo
      Abstract: Publication date: Available online 21 June 2016
      Source:Arab Journal of Mathematical Sciences
      Author(s): Feng Qi, Bai-Ni Guo
      In the paper, the authors analytically find some explicit formulas and recursive formulas for the large and little Schröder numbers.

      PubDate: 2016-06-28T22:03:13Z
      DOI: 10.1016/j.ajmsc.2016.06.002
       
  • Ground state solutions and least energy sign-changing solutions for a
           class of fourth order Kirchhoff-type equations in RN

    • Authors: Sofiane Khoutir; Haibo Chen
      Abstract: Publication date: Available online 21 June 2016
      Source:Arab Journal of Mathematical Sciences
      Author(s): Sofiane Khoutir, Haibo Chen
      In this article we study the problem Δ 2 u − ( 1 + λ ∫ R N ∇ u 2 d x ) Δ u + V ( x ) u = u p − 2 u in  R N , where Δ 2 ≔ Δ ( Δ ) is the biharmonic operator, λ > 0 is a parameter, p ∈ ( 2 , 2 ∗ ) , and V ( x ) ∈ C ( R N , R ) . Under appropriate assumptions on V ( x ) , the existence of ground state solutions and least energy sign-changing solution is obtained by combining the variational methods and the Nehari method.

      PubDate: 2016-06-28T22:03:13Z
       
  • On subspace-diskcyclicity

    • Authors: Nareen Bamerni; Adem Kılıçman
      Abstract: Publication date: Available online 14 June 2016
      Source:Arab Journal of Mathematical Sciences
      Author(s): Nareen Bamerni, Adem Kılıçman
      In this paper, we define and study subspace-diskcyclic operators. We show that subspace-diskcyclicity does not imply diskcyclicity. We establish a subspace-diskcyclic criterion and use it to find a subspace-diskcyclic operator that is not subspace-hypercyclic for any subspaces. Also, we show that the inverses of invertible subspace-diskcyclic operators do not need to be subspace-diskcyclic for any subspaces. Finally, we prove that every finite-dimensional Banach space over the complex field supports a subspace-diskcyclic operator.

      PubDate: 2016-06-18T20:53:37Z
      DOI: 10.1016/j.ajmsc.2016.06.001
       
  • Some congruences modulo 2 and 5 for bipartition with 5-core

    • Authors: Nipen Saikia; Chayanika Boruah
      Abstract: Publication date: Available online 2 June 2016
      Source:Arab Journal of Mathematical Sciences
      Author(s): Nipen Saikia, Chayanika Boruah
      We find some congruences modulo 2 and 5 for the number of bipartitions with 5-core for a positive integer n in the spirit of Ramanujan.

      PubDate: 2016-06-13T06:43:42Z
       
  • On a type of almost Kenmotsu manifolds with nullity distributions

    • Authors: U.C. De; Krishanu Mandal
      Abstract: Publication date: Available online 27 April 2016
      Source:Arab Journal of Mathematical Sciences
      Author(s): U.C. De, Krishanu Mandal
      The object of the present paper is to characterize Weyl semisymmetric almost Kenmotsu manifolds with its characteristic vector field ξ belonging to the ( k , μ ) ′ -nullity distribution and ( k , μ ) -nullity distribution respectively. Also we characterize almost Kenmotsu manifolds satisfying the curvature condition C ⋅ S = 0 , where C and S are the Weyl conformal curvature tensor and Ricci tensor respectively with its characteristic vector field ξ belonging to the ( k , μ ) ′ -nullity distribution. As a consequence of the main results we obtain several corollaries. Finally, we present an example to verify our results.

      PubDate: 2016-05-04T10:22:41Z
      DOI: 10.1016/j.ajmsc.2016.04.001
       
 
 
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