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  Subjects -> MATHEMATICS (Total: 867 journals)
    - APPLIED MATHEMATICS (69 journals)
    - GEOMETRY AND TOPOLOGY (19 journals)
    - MATHEMATICS (645 journals)
    - MATHEMATICS (GENERAL) (40 journals)
    - NUMERICAL ANALYSIS (19 journals)
    - PROBABILITIES AND MATH STATISTICS (75 journals)

MATHEMATICS (645 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: 2)
Academic Voices : A Multidisciplinary Journal     Open Access   (Followers: 2)
Accounting Perspectives     Full-text available via subscription   (Followers: 6)
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: 10)
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: 5)
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: 4)
Advances in Difference Equations     Open Access   (Followers: 1)
Advances in Fixed Point Theory     Open Access   (Followers: 5)
Advances in Geosciences (ADGEO)     Open Access   (Followers: 9)
Advances in Linear Algebra & Matrix Theory     Open Access   (Followers: 1)
Advances in Materials Sciences     Open Access   (Followers: 16)
Advances in Mathematical Physics     Open Access   (Followers: 6)
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: 5)
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)
Algebra and Logic     Hybrid Journal   (Followers: 2)
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: 9)
Algorithms Research     Open Access   (Followers: 1)
American Journal of Biostatistics     Open Access   (Followers: 9)
American Journal of Computational and Applied Mathematics     Open Access   (Followers: 3)
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: 4)
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: 8)
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: 2)
Arabian Journal of Mathematics     Open Access   (Followers: 2)
Archive for Mathematical Logic     Hybrid Journal   (Followers: 1)
Archive of Applied Mechanics     Hybrid Journal   (Followers: 4)
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: 17)
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: 3)
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: 17)
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: 1)
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: 12)
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: 7)
Discrete Mathematics & Theoretical Computer Science     Open Access  
Discrete Mathematics, Algorithms and Applications     Hybrid Journal   (Followers: 2)
Discussiones Mathematicae Graph Theory     Open Access   (Followers: 1)
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: 4)
ESAIM: Control Optimisation and Calculus of Variations     Full-text available via subscription   (Followers: 1)
European Journal of Combinatorics     Full-text available via subscription   (Followers: 4)
European Journal of Mathematics     Hybrid Journal   (Followers: 1)
European Scientific Journal     Open Access   (Followers: 2)
Experimental Mathematics     Hybrid Journal   (Followers: 3)
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)
Formalized Mathematics     Open Access   (Followers: 2)
Foundations and Trends® in Econometrics     Full-text available via subscription   (Followers: 4)

        1 2 3 4 | Last

Journal Cover Afrika Matematika
  [SJR: 0.248]   [H-I: 6]   [1 followers]  Follow
    
   Hybrid Journal Hybrid journal (It can contain Open Access articles)
   ISSN (Print) 1012-9405 - ISSN (Online) 2190-7668
   Published by Springer-Verlag Homepage  [2329 journals]
  • The connected vertex detour monophonic number of a graph
    • Authors: P. Titus; P. Balakrishnan; K. Ganesamoorthy
      Pages: 311 - 320
      Abstract: For any vertex x in a connected graph G of order \(n \ge 2\) , a set \(S \subseteq V(G)\) is an x-detour monophonic set of G if each vertex \(v \in V(G)\) lies on an x-y detour monophonic path for some element y in S. The minimum cardinality of an x-detour monophonic set of G is the x-detour monophonic number of G, denoted by \(dm_x(G)\) . A connected x-detour monophonic set of G is an x-detour monophonic set S such that the subgraph induced by S is connected. The minimum cardinality of a connected x-detour monophonic set of G is the connected x-detour monophonic number of G, denoted by \(cdm_x(G)\) . We determine bounds for it and find the value of \(cdm_x(G)\) for some special classes of graphs. For positive integers r, d and k with \(2 \le r \le d\) and \(k \ge 2\) , there exists a connected graph G with monophonic radius r, monophonic diameter d and connected x-detour monophonic number k for some vertex x in G. Also, it is shown that for positive integers j, k, l and n with \(2 \le j \le k \le l \le n-4\) , there is a connected graph G of order n with \(m_x(G) = j, dm_x(G) = k\) and \(cdm_x(G) = l\) for some vertex x in G, where \(m_x(G)\) is the x-monophonic number of G.
      PubDate: 2017-06-01
      DOI: 10.1007/s13370-016-0452-x
      Issue No: Vol. 28, No. 3-4 (2017)
       
  • The generalized contraction proximal point algorithm with square-summable
           errors
    • Authors: Oganeditse A. Boikanyo
      Pages: 321 - 332
      Abstract: Let \((x_n)\) be a sequence generated by \(x_{n+1}=\alpha _nu+\gamma _nx_n+\delta _nJ_{\beta _n}x_n+e_n\) for \(n\ge 0\) , where \(J_{\beta _n}\) is the resolvent of a maximal monotone operator A with \(\beta _n\in (0,\infty )\) , \(u,x_0\in H\) , \((e_n)\) is a sequence of errors and \(\alpha _n\in (0,1)\) , \(\gamma _n\in (-1,1)\) , \(\delta _n\in (0,2)\) are real numbers such that \(\alpha _n+\gamma _n+\delta _n=1\) for all \(n\ge 0\) . We present strong convergence results for the sequence generated by the generalized contraction proximal point algorithm defined above under weaker accuracy conditions and mild conditions on the parameters \(\alpha _n, \beta _n\) and \(\delta _n\) . Our results generalize and unify many known results in the literature.
      PubDate: 2017-06-01
      DOI: 10.1007/s13370-016-0453-9
      Issue No: Vol. 28, No. 3-4 (2017)
       
  • Stable equilibrium configuration of two bar truss by an efficient
           nonmonotone global Barzilai–Borwein gradient method in a fuzzy
           environment
    • Authors: Hadi Nosratipour; Omid Solaymani Fard; Akbar Hashemi Borzabadi; Farhad Sarani
      Pages: 333 - 356
      Abstract: The stable equilibrium configuration of structures is a main goal in structural optimization. This goal may be achieved through minimizing the potential energy function. In the real world, sometimes, the input data and parameters of structural engineering design problems may be considered as fuzzy numbers which lead us to develop structural optimization methods in a fuzzy environment. In this regard, the present paper is intended to propose a fuzzy optimization scheme according to the nonmonotone globalization technique, the Barzilai–Borwein (BB) gradient method and the generalized Hukuhara differentiability (gH-differentiability). In fact, using the best benefits of BB-like methods i.e., simplicity, efficiency and low memory requirements, a modified global Barzilai–Borwein (GBB) gradient method is proposed for obtaining a non-dominated solution of the unconstrained fuzzy optimization related to the two bar asymmetric shallow truss in a fuzzy environment. The global convergence to first-order stationary points is also proved and the R-linear convergence rate is established under suitable assumptions. Furthermore, some numerical examples are given to illustrate the main results.
      PubDate: 2017-06-01
      DOI: 10.1007/s13370-016-0451-y
      Issue No: Vol. 28, No. 3-4 (2017)
       
  • Existence of entropy solutions for some anisotropic quasilinear elliptic
           unilateral problems
    • Authors: Mohammed Al-Hawmi; Elhoussine Azroul; Hassane Hjiaj; Abdelfattah Touzani
      Pages: 357 - 378
      Abstract: In this work, we consider the following quasilinear elliptic unilateral equations of the type $$\begin{aligned} -\sum _{i=1}^{N}\frac{\partial }{\partial x_{i}}a_{i}(x,u,\nabla u) = \mu - \text{ div } \phi (u)\quad \text{ in } \Omega . \end{aligned}$$ In the anisotropic Sobolev space, we prove the existence of entropy solutions for our unilateral problem, where \(\mu = f-\text{ div } F\) belongs to \(L^{1}(\Omega ) + W^{-1,\mathbf {p'}}(\Omega )\) and \(\phi (\cdot ) \in C^{0}(\mathbb {R},\mathbb {R}^{N}).\)
      PubDate: 2017-06-01
      DOI: 10.1007/s13370-016-0448-6
      Issue No: Vol. 28, No. 3-4 (2017)
       
  • On neutrosophic soft lattices
    • Authors: Vakkas Uluçay; Mehmet Şahin; Necati Olgun; Adem Kilicman
      Pages: 379 - 388
      Abstract: In this study, using the neutrosophic soft definitions, we define some new concept such as the neutrosophic soft lattice, neutrosophic soft sublattice, complete neutrosophic soft lattice, modular neutrosophic soft lattice, distributive neutrosophic soft lattice, neutrosophic soft chain then we study the relationship and observe some common properties.
      PubDate: 2017-06-01
      DOI: 10.1007/s13370-016-0447-7
      Issue No: Vol. 28, No. 3-4 (2017)
       
  • A primal-dual interior-point algorithm for symmetric optimization based on
           a new kernel function with trigonometric barrier term yielding the best
           known iteration bounds
    • Authors: B. Kheirfam
      Pages: 389 - 406
      Abstract: Kernel functions play an important role in defining new search directions for primal-dual interior-point algorithms for solving symmetric optimization problems. In this paper we present a new kernel function for which interior point method yields iteration bounds \({\mathcal {O}}(\sqrt{r}\log r\log \frac{r}{\epsilon })\) and \({\mathcal {O}}(\sqrt{r}\log \frac{r}{\epsilon })\) for large-and small-update methods, respectively, which matches currently the best known bounds for such methods.
      PubDate: 2017-06-01
      DOI: 10.1007/s13370-016-0455-7
      Issue No: Vol. 28, No. 3-4 (2017)
       
  • Numerical simulation of steel solidification in continuous casting
    • Authors: Ghania Khenniche; Pierre Spiteri; Salah Bouhouche; Hocine Sissaoui
      Pages: 417 - 441
      Abstract: The present study deals with the numerical simulation of steel solidification in continuous casting. We consider a semi-discretization with respect to the time of the studied evolution problem; then we have to solve a sequence of stationary coupled problems. So, due to the fact that the temperature is assumed to be positive, after reformulation of the problem into a variational inequality, we study under appropriate assumptions the existence and uniqueness of the solution of the stationary coupled problems. We also consider a multivalued formulation of the same problem which allows to analyze the behavior of the iterative relaxation algorithms used for the solution of the discretized problems. Finally the numerical experiments are presented.
      PubDate: 2017-06-01
      DOI: 10.1007/s13370-016-0454-8
      Issue No: Vol. 28, No. 3-4 (2017)
       
  • Numerical approximations of second order PDEs by boundary value methods
           and the method of lines
    • Authors: T. A. Biala; S. N. Jator; R. B. Adeniyi
      Pages: 443 - 450
      Abstract: In this work, we study the performance of boundary value methods (BVMs) discussed in Biala [10] and Biala et al. [11] in combination with the method of lines on second order PDEs. The method of lines converts the PDEs into an equivalent system of second order ordinary differential equations. The performance of BVMs on the semi-discretized system is evidenced by a few numerical examples.
      PubDate: 2017-06-01
      DOI: 10.1007/s13370-016-0458-4
      Issue No: Vol. 28, No. 3-4 (2017)
       
  • Some generalizations and refined Hardy type integral inequalities
    • Authors: Khaled Mehrez
      Pages: 451 - 457
      Abstract: In this paper, by using Jensen’s inequality and Chebyshev integral inequality, some generalizations and new refined Hardy type integral inequalities are obtained. In addition, the corresponding reverse relation are also proved.
      PubDate: 2017-06-01
      DOI: 10.1007/s13370-016-0461-9
      Issue No: Vol. 28, No. 3-4 (2017)
       
  • Permanent of a rhotrix
    • Authors: Abdulhadi Aminu; Muhammad Aminu; M. Z. Ringim
      Pages: 481 - 491
      Abstract: The permanent is a matrix function introduced (independently) by Cauchy and Binet and a number of results have so far been proved. In this paper, we extend the concept of permanent into rhotrix and also present a way of finding the permanent of a rhotrix and also establish some results. Rhotrix is an object that lies in some way between \(n\times n\) dimensional matrices and \(( {2n-1})\times (2n-1)\) dimensional matrices.
      PubDate: 2017-06-01
      DOI: 10.1007/s13370-016-0457-5
      Issue No: Vol. 28, No. 3-4 (2017)
       
  • On the classification of transversely projective foliations on
           pseudo-Anosov bundle
    • Authors: Hamidou Dathe; Adamou Saidou
      Pages: 493 - 503
      Abstract: We build a concrete pseudo-Anosov bundle on which there is no transversely projective foliation without compact leaf that is not transversely affine.
      PubDate: 2017-06-01
      DOI: 10.1007/s13370-016-0462-8
      Issue No: Vol. 28, No. 3-4 (2017)
       
  • Planarity and outerplanarity indexes of the zero-divisor graphs
    • Authors: Zahra Barati
      Pages: 505 - 514
      Abstract: In this paper, we consider the problem of planarity and outerplanarity of iterated line graphs of the zero divisor graphs for finite commutative rings. We give a full characterization of all zero divisor graphs with respect to their planarity and outerplanarity indexes.
      PubDate: 2017-06-01
      DOI: 10.1007/s13370-016-0460-x
      Issue No: Vol. 28, No. 3-4 (2017)
       
  • A note on partial metric type structures and metric type structures
    • Authors: Maggie Aphane; Seithuti Moshokoa
      Pages: 549 - 553
      Abstract: In the note we discuss partial metric type structures and present their basic properties as well as their relationship with metric type structures. As an application, fixed point theorems for a Lipschitzian map on this structures will be presented.
      PubDate: 2017-06-01
      DOI: 10.1007/s13370-016-0467-3
      Issue No: Vol. 28, No. 3-4 (2017)
       
  • A note on prime ring with generalized derivation
    • Authors: Mohd Arif Raza; Nadeem Ur Rehman
      Pages: 555 - 561
      Abstract: Let R be a prime ring of characteristic different from two with center Z(R). In the present paper we study the case when a generalized derivation F associated with a nonzero derivation d of R satisfies \([F([x, y]_k), [x, y]_k]\in Z(R)\) for all x, y in some appropriate subset of R, where k is a fixed positive integer. We obtain a description of the structure of R and information on the form of F in terms of the standard identity \(s_4\) and the multiplication by the specific element from the extended centroid.
      PubDate: 2017-06-01
      DOI: 10.1007/s13370-016-0465-5
      Issue No: Vol. 28, No. 3-4 (2017)
       
  • The extensibility of the $$D(\pm k)$$ D ( ± k ) -triple $$\{k\mp 1,k,
           4k\mp 1\}$$ { k ∓ 1 , k , 4 k ∓ 1 }
    • Authors: Appolinaire Dossavi-Yovo; Bo He; Alain Togbé
      Pages: 563 - 574
      Abstract: In this paper, we consider the \(D(\pm k)\) -triple \(\{k\mp 1,k, 4k\mp 1\}\) and we prove that, if k is not a perfect square then: There is no d such that \(\{k-1,k, 4k-1, d\}\) is a D(k)-quadruple; If \(\{k,k+1,4k+1,d \}\) is a \(D(-k)\) -quadruple, then \(d=1\) . This extends a work done by Fujita [13].
      PubDate: 2017-06-01
      DOI: 10.1007/s13370-016-0466-4
      Issue No: Vol. 28, No. 3-4 (2017)
       
  • Projective zero divisor graphs of partially ordered sets
    • Authors: A. Parsapour; Kh. Ahmad Javaheri
      Pages: 575 - 593
      Abstract: The zero divisor graph of a partially ordered set (poset, briefly) \((P, \le )\) with the least element 0, which is denoted by \(G^*(P)\) , is an undirected graph with vertex set \(P^*= P{\setminus } \{0\}\) and, for two distinct vertices x and y, x is adjacent to y in \(G^*(P)\) if and only if \(\{x,y\}^l=\{0\}\) , where, for a subset S of P, \(S^l\) is the set of all elements \(x\in P\) with \(x\le s\) , for all \(s\in S\) . In this paper we completely characterize all posets P with projective zero divisor graphs \(G^*(P)\) .
      PubDate: 2017-06-01
      DOI: 10.1007/s13370-016-0464-6
      Issue No: Vol. 28, No. 3-4 (2017)
       
  • An iterative method for multivalued tempered Lipschitz hemicontractive
           mappings
    • Authors: M. E. Okpala
      Pages: 595 - 604
      Abstract: In this paper we introduce a new general class of multi-valued Lipschitz hemicontractive mappings. We then prove strong convergence theorems for finding a fixed point of the mapping using a new two steps averaged algorithm. The method used in the proof is new and enables us to systematically avoid so many strong assumptions in the contemporary literature. The theorems obtained generalize and improve many results in the literature.
      PubDate: 2017-06-01
      DOI: 10.1007/s13370-016-0468-2
      Issue No: Vol. 28, No. 3-4 (2017)
       
  • The Ces $$\grave{\mathbf{a }}$$ a ` ro $$\chi ^{2}$$ χ 2 of tensor
           products in Orlicz sequence spaces
    • Authors: N. Subramanian
      Pages: 615 - 628
      Abstract: Let X be a Banach lattice and \(\chi ^{2}_{f}\) be an double gai Orlicz sequence space associated to an Orlicz function with the \(\Delta _{2}\) - condition. In this paper we define the Ces \(\grave{\mathbf{a }}\) ro \(\chi ^{2}\) sequence space Ces \(_{p}^{q}\left( \chi ^{2}_{f}\right) \) generated by a Orlicz sequence space and exhibit some general properties of the spaces.
      PubDate: 2017-06-01
      DOI: 10.1007/s13370-016-0469-1
      Issue No: Vol. 28, No. 3-4 (2017)
       
  • Third derivative hybrid block integrator for solution of stiff systems of
           initial value problems
    • Authors: Olusheye Akinfenwa
      Pages: 629 - 641
      Abstract: A new third derivative hybrid block method is presented for the solution of first order stiff systems of initial value problems. The main method and additional methods are obtained from the same continuous scheme derived via interpolation and collocation procedures using power series as the basis function. The continuous representation of the scheme permits us to evaluate at both grid and off-grid points. The stability properties of the method is discussed. The block method is applied simultaneously to generate the numerical solutions of (1) over non-overlapping intervals. Numerical results obtained using the proposed third derivative hybrid method in block form reveal that it compares favorably well with existing methods in the literature.
      PubDate: 2017-06-01
      DOI: 10.1007/s13370-016-0471-7
      Issue No: Vol. 28, No. 3-4 (2017)
       
  • On multiplication operators acting on Köthe sequence spaces
    • Authors: Julio C. Ramos-Fernández; Margot Salas-Brown
      Pages: 661 - 667
      Abstract: We present some characterizations for the multiplication operators \(M_u\) with finite range when acts on any Köthe sequence spaces. we also characterize its compactness and Fredholmness. Our characterizations are presented in terms of certain properties of the zeros set and the support of the symbol u.
      PubDate: 2017-06-01
      DOI: 10.1007/s13370-016-0475-3
      Issue No: Vol. 28, No. 3-4 (2017)
       
 
 
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