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MATHEMATICS (706 journals)                  1 2 3 4 | Last

Showing 1 - 200 of 538 Journals sorted alphabetically
Abakós     Open Access   (Followers: 4)
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: 7)
ACM Transactions on Algorithms (TALG)     Hybrid Journal   (Followers: 15)
ACM Transactions on Computational Logic (TOCL)     Hybrid Journal   (Followers: 3)
ACM Transactions on Mathematical Software (TOMS)     Hybrid Journal   (Followers: 6)
ACS Applied Materials & Interfaces     Full-text available via subscription   (Followers: 27)
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: 6)
Acta Mathematica Vietnamica     Hybrid Journal  
Acta Mathematicae Applicatae Sinica, English Series     Hybrid Journal  
Advanced Science Letters     Full-text available via subscription   (Followers: 9)
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: 6)
Advances in Computational Mathematics     Hybrid Journal   (Followers: 18)
Advances in Decision Sciences     Open Access   (Followers: 3)
Advances in Difference Equations     Open Access   (Followers: 3)
Advances in Fixed Point Theory     Open Access   (Followers: 5)
Advances in Geosciences (ADGEO)     Open Access   (Followers: 13)
Advances in Linear Algebra & Matrix Theory     Open Access   (Followers: 2)
Advances in Materials Sciences     Open Access   (Followers: 14)
Advances in Mathematical Physics     Open Access   (Followers: 3)
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: 12)
Advances in Porous Media     Full-text available via subscription   (Followers: 5)
Advances in Pure and Applied Mathematics     Hybrid Journal   (Followers: 6)
Advances in Pure Mathematics     Open Access   (Followers: 5)
Advances in Science and Research (ASR)     Open Access   (Followers: 4)
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: 11)
AKSIOMA Journal of Mathematics Education     Open Access   (Followers: 1)
Al-Jabar : Jurnal Pendidikan Matematika     Open Access  
Algebra and Logic     Hybrid Journal   (Followers: 5)
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 Computational and Applied Mathematics     Open Access   (Followers: 5)
American Journal of Mathematical Analysis     Open Access  
American Journal of Mathematics     Full-text available via subscription   (Followers: 6)
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: 8)
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: 11)
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: 12)
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)
ANZIAM Journal     Open Access   (Followers: 1)
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: 11)
Applied Mathematics     Open Access   (Followers: 3)
Applied Mathematics     Open Access   (Followers: 6)
Applied Mathematics & Optimization     Hybrid Journal   (Followers: 6)
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   (Followers: 3)
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: 2)
Archive of Applied Mechanics     Hybrid Journal   (Followers: 5)
Archive of Numerical Software     Open Access  
Archives of Computational Methods in Engineering     Hybrid Journal   (Followers: 5)
Arkiv för Matematik     Hybrid Journal   (Followers: 1)
Armenian Journal of Mathematics     Open Access  
Arnold Mathematical Journal     Hybrid Journal   (Followers: 1)
Artificial Satellites : The Journal of Space Research Centre of Polish Academy of Sciences     Open Access   (Followers: 20)
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: 6)
Australian Primary Mathematics Classroom     Full-text available via subscription   (Followers: 4)
Australian Senior Mathematics Journal     Full-text available via subscription   (Followers: 1)
Automatic Documentation and Mathematical Linguistics     Hybrid Journal   (Followers: 5)
Axioms     Open Access   (Followers: 1)
Baltic International Yearbook of Cognition, Logic and Communication     Open Access   (Followers: 1)
Basin Research     Hybrid Journal   (Followers: 5)
BIBECHANA     Open Access   (Followers: 2)
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: 21)
Bruno Pini Mathematical Analysis Seminar     Open Access  
Buletinul Academiei de Stiinte a Republicii Moldova. Matematica     Open Access   (Followers: 11)
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 Symbolic Logic     Full-text available via subscription   (Followers: 2)
Bulletin of the Australian Mathematical Society     Full-text available via subscription   (Followers: 1)
Bulletin of the Brazilian Mathematical Society, New Series     Hybrid Journal  
Bulletin of the London Mathematical Society     Hybrid Journal   (Followers: 4)
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   (Followers: 2)
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: 1)
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: 4)
COMBINATORICA     Hybrid Journal  
Combinatorics, Probability and Computing     Hybrid Journal   (Followers: 4)
Combustion Theory and Modelling     Hybrid Journal   (Followers: 14)
Commentarii Mathematici Helvetici     Hybrid Journal   (Followers: 1)
Communications in Combinatorics and Optimization     Open Access  
Communications in Contemporary Mathematics     Hybrid Journal  
Communications in Mathematical Physics     Hybrid Journal   (Followers: 2)
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: 8)
Compositio Mathematica     Full-text available via subscription   (Followers: 1)
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: 5)
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: 8)
Concrete Operators     Open Access   (Followers: 5)
Confluentes Mathematici     Hybrid Journal  
Contributions to Game Theory and Management     Open Access  
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  
Current Research in Biostatistics     Open Access   (Followers: 9)
Czechoslovak Mathematical Journal     Hybrid Journal   (Followers: 1)
Demographic Research     Open Access   (Followers: 10)
Demonstratio Mathematica     Open Access  
Dependence Modeling     Open Access  
Design Journal : An International Journal for All Aspects of Design     Hybrid Journal   (Followers: 29)
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: 3)
Differentsial'nye Uravneniya     Open Access  
Discrete Mathematics     Hybrid Journal   (Followers: 8)
Discrete Mathematics & Theoretical Computer Science     Open Access  
Discrete Mathematics, Algorithms and Applications     Hybrid Journal   (Followers: 2)
Discussiones Mathematicae - General Algebra and Applications     Open Access  
Discussiones Mathematicae Graph Theory     Open Access   (Followers: 1)
Diskretnaya Matematika     Full-text available via subscription  
Dnipropetrovsk University Mathematics Bulletin     Open Access  
Doklady Akademii Nauk     Open Access  
Doklady Mathematics     Hybrid Journal  
Duke Mathematical Journal     Full-text available via subscription   (Followers: 1)
Eco Matemático     Open Access  
Edited Series on Advances in Nonlinear Science and Complexity     Full-text available via subscription  
Electronic Journal of Differential Equations     Open Access  
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: 4)

        1 2 3 4 | Last

Journal Cover Bulletin of the Malaysian Mathematical Sciences Society
  [SJR: 0.614]   [H-I: 14]   [0 followers]  Follow
   Hybrid Journal Hybrid journal (It can contain Open Access articles)
   ISSN (Print) 0126-6705 - ISSN (Online) 2180-4206
   Published by Springer-Verlag Homepage  [2351 journals]
  • On the Jensen Functional and Strong Convexity
    • Authors: Flavia-Corina Mitroi-Symeonidis; Nicuşor Minculete
      Pages: 311 - 319
      Abstract: In this note we describe some results concerning upper and lower bounds for the Jensen functional. We use several known and new results to shed light on the concept of a strongly convex function.
      PubDate: 2018-01-01
      DOI: 10.1007/s40840-015-0293-z
      Issue No: Vol. 41, No. 1 (2018)
  • Classification of the Toroidal Jacobson Graphs
    • Authors: H. Amraei; H. R. Maimani; M. R. Pournaki; A. Zaeembashi
      Pages: 321 - 334
      Abstract: Let R be a finite commutative ring with nonzero identity and denote its Jacobson radical by J(R). The Jacobson graph of R is the graph in which the vertex set is \(R\setminus J(R)\) , and two distinct vertices x and y are adjacent if and only if \(1-xy\) is not a unit in R. In this paper, up to isomorphism, we classify the rings R whose Jacobson graphs are toroidal.
      PubDate: 2018-01-01
      DOI: 10.1007/s40840-015-0294-y
      Issue No: Vol. 41, No. 1 (2018)
  • On Meromorphic Solutions of Functional Equations of Fermat Type
    • Authors: Pei-Chu Hu; Qiong Wang
      Abstract: Take complex numbers \(\alpha ,\beta ,c,a_j,b_j\) \((j=0,1,2)\) such that \(c\ne 0\) and $$\begin{aligned} \mathrm{rank} \left( \begin{array}{ccc} a_{0} &{} a_{1} &{} a_{2}\\ b_{0} &{} b_{1} &{} b_{2}\\ \end{array} \right) =2. \end{aligned}$$ We show that if the following functional equation of Fermat type $$\begin{aligned} \begin{aligned} \left\{ a_{0}f(z)+a_{1}f(z+c)+a_{2}f'(z)\right\} ^3+\left\{ b_{0}f(z)+b_{1}f(z+c)+b_{2}f'(z)\right\} ^3=e^{\alpha z+\beta } \end{aligned} \end{aligned}$$ has meromorphic solutions of finite order, then it has only entire solutions of the form \(f(z)=Ae^{\frac{\alpha z+\beta }{3}}+Ce^{Dz},\) where A, C, D are constants, which generalizes some results due to Han and Lü.
      PubDate: 2018-02-23
      DOI: 10.1007/s40840-018-0613-1
  • Convergence Analysis of SP-Iteration for G -Nonexpansive Mappings with
           Directed Graphs
    • Authors: Phikul Sridarat; Raweerote Suparaturatorn; Suthep Suantai; Yeol Je Cho
      Abstract: In this paper, we prove weak and strong convergence theorems of SP-iteration for common fixed point of three G-nonexpansive mappings in uniformly convex Banach spaces endowed with a directed graph under some suitable control conditions. We also give some numerical examples for confirming our main theorem and compare convergence rate between SP-iteration and Noor iteration.
      PubDate: 2018-02-19
      DOI: 10.1007/s40840-018-0606-0
  • The Local Metric Dimension of the Lexicographic Product of Graphs
    • Authors: Gabriel A. Barragán-Ramírez; Alejandro Estrada-Moreno; Yunior Ramírez-Cruz; Juan A. Rodríguez-Velázquez
      Abstract: The metric dimension is quite a well-studied graph parameter. Recently, the local metric dimension and the adjacency dimension have been introduced and studied. In this paper, we give a general formula for the local metric dimension of the lexicographic product \(G \circ \mathcal {H}\) of a connected graph G of order n and a family \(\mathcal {H}\) composed of n graphs. We show that the local metric dimension of \(G \circ \mathcal {H}\) can be expressed in terms of the numbers of vertices in the true twin equivalence classes of G, and the local adjacency dimension of the graphs in \(\mathcal {H}\) .
      PubDate: 2018-02-19
      DOI: 10.1007/s40840-018-0611-3
  • Relatively Uniform Weighted Summability Based on Fractional-Order
           Difference Operator
    • Authors: Uǧur Kadak; H. M. Srivastava; M. Mursaleen
      Abstract: In the present paper, we introduce the notion of relatively uniform weighted summability and its statistical version based upon fractional-order difference operators of functions. The concept of relatively uniform weighted \(\alpha \beta \) -statistical convergence is also introduced and some inclusion relations concerning the newly proposed methods are derived. As an application, we prove a general Korovkin-type approximation theorem for functions of two variables and also construct an illustrative example by the help of generating function type non-tensor Meyer-König and Zeller operators. Moreover, it is shown that the proposed methods are non-trivial generalizations of relatively uniform convergence which includes a scale function. We estimate the rate of convergence of approximating positive linear operators by means of the modulus of continuity and give a Voronovskaja-type approximation theorem. Finally, we present some computational results and geometrical interpretations to illustrate some of our approximation results.
      PubDate: 2018-02-19
      DOI: 10.1007/s40840-018-0612-2
  • Strong Geodetic Problem in Grid-Like Architectures
    • Authors: Sandi Klavžar; Paul Manuel
      Abstract: A recent variation of the classical geodetic problem, the strong geodetic problem, is defined as follows. If G is a graph, then \(\mathrm{sg}(G)\) is the cardinality of a smallest vertex subset S, such that one can assign a fixed geodesic to each pair \(\{x,y\}\subseteq S\) so that these \(\left( {\begin{array}{c} S \\ 2\end{array}}\right) \) geodesics cover all the vertices of G. In this paper, the strong geodetic problem is studied on Cartesian product graphs. A general upper bound is proved on the Cartesian product of a path with an arbitrary graph and showed that the bound is tight on thin grids and thin cylinders.
      PubDate: 2018-02-16
      DOI: 10.1007/s40840-018-0609-x
  • Preservers of Radial Unitary Similarity Functions on Jordan Semi-Triple
           Products of Self-Adjoint Operators
    • Authors: Qingsen Xu; Jinchuan Hou
      Abstract: Let H be a complex Hilbert space with dim H \(\ge \) 3, \(\mathcal {B}_s(H)\) be the Jordan algebra of all bounded self-adjoint operators on H, and let \(F:B(H)\rightarrow [d,\infty ]\) with \(d\ge 0\) be a radial unitary similarity invariant function. In this paper, a characterization is obtained for maps \(\phi \) on \(\mathcal {B}_s(H)\) satisfying \(F(\phi (A)\phi (B)\phi (A))=F(ABA)\ \ (A,B\in \mathcal {B}_s(H))\) . As applications, a general form of the maps on \(\mathcal {B}_s(H)\) preserving the p-norm, the maps preserving the pseudo-spectral radius and the maps preserving the pseudo-spectrum are also described.
      PubDate: 2018-02-16
      DOI: 10.1007/s40840-018-0610-4
  • Existence of Solutions and Finite-Time Stability for Nonlinear Singular
           Discrete-Time Neural Networks
    • Authors: Le A. Tuan; Vu N. Phat
      Abstract: This paper investigates the problem of finite-time stability and control for a class of nonlinear singular discrete-time neural networks with time-varying delays and disturbances. First, based on the implicit function theorem and singular value decomposition method, a sufficient condition for the existence of the solution of such systems is established in terms of a linear matrix inequality (LMI). Then, using the Lyapunov functional approach combined with LMI technique we provide new delay-dependent sufficient conditions for robust \(H_{\infty }\) finite-time stability and control. Finally, some numerical examples are given to illustrate the efficiency of the proposed results.
      PubDate: 2018-02-13
      DOI: 10.1007/s40840-018-0608-y
  • B-Valued Martingale Hardy–Lorentz–Karamata Spaces
    • Authors: Kaituo Liu; Weiwei Li; Tian Yue
      Abstract: In this paper, we investigate the Hardy–Lorentz–Karamata spaces for Banach space-valued martingales. Relying on the geometrical properties of the underlying Banach spaces, we establish the atomic decompositions and characterize the dual spaces of these spaces. We also obtain some martingale inequalities in the setting of Hardy–Lorentz–Karamata spaces.
      PubDate: 2018-02-12
      DOI: 10.1007/s40840-018-0607-z
  • Positive Solutions for Elliptic Problems Involving
           Hardy–Sobolev–Maz’ya Terms
    • Authors: Rui-Ting Jiang; Chun-Lei Tang
      Abstract: In the present paper, we study the semilinear elliptic problem \(\displaystyle -\Delta u -\mu \frac{u}{ y ^{2}}=\frac{ u ^{2^{*}(s)-2}u}{ y ^{s}}+ f(x,u)\) in bounded domain. Replacing the Ambrosetti–Rabinowitz condition by general superquadratic assumptions and the nonquadratic assumption, we establish the existence results of positive solutions.
      PubDate: 2018-02-09
      DOI: 10.1007/s40840-018-0603-3
  • Decay of an Extensible Viscoelastic Plate Equation with a Nonlinear Time
    • Authors: Baowei Feng; Khaled Zennir; Lakhdar Kassah Laouar
      Abstract: An extensible viscoelastic plate equation with a nonlinear time-varying delay feedback and nonlinear source term is considered. Under suitable assumptions on relaxation function, nonlinear internal delay feedback, and source term, we establish a general decay of energy by using the multiplier method if the weight of weak dissipation and the delay satisfy \(\mu _2<\frac{\mu _1\alpha _1(1-d)}{\alpha _2(1-\alpha _1d)}\) , and extend some known results.
      PubDate: 2018-02-09
      DOI: 10.1007/s40840-018-0602-4
  • Asymptotic Almost Periodicity of Stochastic Evolution Equations
    • Authors: Junfei Cao; Zaitang Huang
      Abstract: In this paper, we establish a new existence theorem for asymptotically almost periodic mild solutions to a class of semilinear stochastic evolution equations. As one would expect, our result would generalize and improve some related results in this area.
      PubDate: 2018-02-08
      DOI: 10.1007/s40840-018-0604-2
  • Some Simple Criteria for the Solvability of Block $$2 \times 2$$ 2 × 2
           Linear Systems
    • Authors: Yongxin Yuan; Kezheng Zuo; Hao Liu; Wenhua Zhao
      Abstract: In many areas, there arise linear systems of the form $$\begin{aligned} \left[ \begin{array}{ll} A &{}\quad B^\top \\ B &{}\quad -\,D \\ \end{array} \right] \left[ \begin{array}{c} x \\ y \\ \end{array} \right] =\left[ \begin{array}{c} f \\ g \\ \end{array} \right] , \end{aligned}$$ where \(A \in {\mathbf {R}}^{n\times n}, D \in {\mathbf {R}}^{p\times p}\) are symmetric and positive semi-definite and \(B \in {\mathbf {R}}^{p \times n}.\) In this paper, some simple criteria for this special linear systems to have solutions and the unique solution are provided, and the solvability conditions are expressed by \(A, B, D, f\) and \(g\) .
      PubDate: 2018-02-06
      DOI: 10.1007/s40840-018-0601-5
  • Generalized Weighted Composition Operators from Bloch-Type Spaces into
           Zygmund-Type Spaces
    • Authors: Qinghua Hu
      Abstract: A new characterization for the boundedness, compactness and the essential norm of generalized weighted composition operators from Bloch-type spaces into Zygmund-type spaces are given in this paper.
      PubDate: 2018-02-05
      DOI: 10.1007/s40840-018-0605-1
  • The Rank of the Semigroup of All Order-Preserving Transformations on a
           Finite Fence
    • Authors: Vítor H. Fernandes; Jörg Koppitz; Tiwadee Musunthia
      Abstract: A zig-zag (or fence) order is a special partial order on a (finite) set. In this paper, we consider the semigroup \(\mathscr {TF}_{n}\) of all order-preserving transformations on an n-element zig-zag-ordered set. We determine the rank of \(\mathscr {TF}_{n}\) and provide a minimal generating set for \( \mathscr {TF}_{n}\) . Moreover, a formula for the number of idempotents in \(\mathscr {TF}_{n}\) is given.
      PubDate: 2018-01-31
      DOI: 10.1007/s40840-017-0598-1
  • Global Power Stability of Neural Networks with Impulses and Proportional
    • Authors: Kaizhong Guan
      Abstract: By establishing two new impulsive delay differential inequalities from impulsive perturbation and impulsive control point of view, respectively, constructing some Lyapunov functionals, and employing the matrix measure approach, some novel and sufficient conditions are obtained to guarantee global power stability of neural networks with impulses and proportional delays. The obtained stability criteria are dependent on impulses and the proportional delay factor so that it is convenient to derive some feasible impulsive control laws according to the proportional delay factor allowed by such neural networks. It is shown that impulses can act as stabilizers to globally power stabilize an unstable neural network with proportional delay based on suitable impulsive control laws. Moreover, the power convergence rate can be estimated and obtained by simple computation. Three numerical examples are given to illustrate the effectiveness and advantages of the results obtained.
      PubDate: 2018-01-16
      DOI: 10.1007/s40840-018-0600-6
  • Forward–Backward Splitting Method for Solving a System of
           Quasi-Variational Inclusions
    • Authors: Shih-Sen Chang; Ching-Feng Wen; Jen-Chih Yao
      Abstract: The purpose of this paper is by using a generalized forward–backward splitting method to propose an iterative algorithm for finding a common element of the set of solutions to a system of quasi-variational inclusions with accretive mappings and the set of fixed points for a \(\lambda \) -strictly pseudo-contractive mapping in Banach spaces. Some strong convergence theorems of the sequence generated by the algorithm are proved. The results presented in the paper extend and improve some recent results. As applications, we utilize our results to study the approximation problem of solutions to a system of variational inequalities, accretive variational inequality problem and convex minimization problem in Banach spaces.
      PubDate: 2018-01-08
      DOI: 10.1007/s40840-017-0599-0
  • Automorphism Group of the Subspace Inclusion Graph of a Vector Space
    • Authors: Xinlei Wang; Dein Wong
      Abstract: In a recent paper, Das introduced the graph \(\mathcal {I}n(\mathbb {V})\) , called subspace inclusion graph on a finite dimensional vector space \(\mathbb {V}\) , where the vertex set is the collection of nontrivial proper subspaces of \(\mathbb {V}\) and two vertices are adjacent if one is properly contained in another. Das studied the diameter, girth, clique number and chromatic number of \(\mathcal {I}n(\mathbb {V})\) when the base field is arbitrary, and he also studied some other properties of \(\mathcal {I}n(\mathbb {V})\) when the base field is finite. At the end of the above paper, the author posed the open problem of determining the automorphisms of \(\mathcal {I}n(\mathbb {V})\) . In this paper, we give the answer to the open problem.
      PubDate: 2018-01-04
      DOI: 10.1007/s40840-017-0597-2
  • Quasi-exact Sequences of S -Acts
    • Authors: Reza Aminizadeh; Hamid Rasouli; Abolfazl Tehranian
      Abstract: In this paper, the notion of (short) quasi-exact sequence of S-acts is introduced. We study the behaviour of quasi-exact sequences in regard to some algebraic properties of S-acts including principal weak injectivity, principal weak flatness, regularity and torsion freeness. Moreover, some results concerning commutative diagrams of modules are generalized to acts over monoids.
      PubDate: 2018-01-03
      DOI: 10.1007/s40840-017-0596-3
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