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  Subjects -> MATHEMATICS (Total: 864 journals)
    - APPLIED MATHEMATICS (68 journals)
    - GEOMETRY AND TOPOLOGY (19 journals)
    - MATHEMATICS (643 journals)
    - MATHEMATICS (GENERAL) (40 journals)
    - NUMERICAL ANALYSIS (19 journals)
    - PROBABILITIES AND MATH STATISTICS (75 journals)

MATHEMATICS (643 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: 4)
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: 15)
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: 3)
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  
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 Numerical Analysis & Computational Mathematics     Hybrid Journal   (Followers: 5)
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: 6)
Australian Primary Mathematics Classroom     Full-text available via subscription   (Followers: 1)
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: 19)
Bruno Pini Mathematical Analysis Seminar     Open Access  
Buletinul Academiei de Stiinte a Republicii Moldova. Matematica     Open Access   (Followers: 5)
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: 2)
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)
CAUCHY     Open Access   (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)

        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  [2335 journals]
  • On a Convection Diffusion Equation with Absorption Term
    • Authors: Miao Ouyang; Huashui Zhan
      Pages: 523 - 544
      Abstract: The paper studies the posedness of the convection diffusion equation $$\begin{aligned} u_{t}=\text {div}\left( \left \nabla u^{m}\right ^{p-2}\nabla u^{m}\right) +\sum _{i=1}^{N}\frac{\partial b_{i}\left( u^{m}\right) }{\partial x_{i}}-u^{mr}. \end{aligned}$$ with homogeneous boundary condition and with the initial value \(u_0(x)\in L^{q-1+\frac{1}{m}}(\Omega )\) . By considering its regularized problem, using Moser iteration technique, the local bounded properties of the \(L^{\infty }\) -norm of \(u_{k}\) and that of the \(L^{p}\) -norm of the gradient \(\nabla u_{k}\) are got, where \(u_{k}\) is the solution of the regularized problem of the equation. By the compactness theorem, the existence of the solution of the equation itself is obtained. By using some techniques in Zhao and Yuan (Chin Ann Math A 16(2):179–194, 1995), the stability of the solutions is obtained too.
      PubDate: 2017-04-01
      DOI: 10.1007/s40840-017-0459-y
      Issue No: Vol. 40, No. 2 (2017)
       
  • Weak Convergence for the Fourth-Order Stochastic Heat Equation with
           Fractional Noises
    • Authors: Junfeng Liu; Guangjun Shen; Yang Yang
      Pages: 565 - 582
      Abstract: In this paper, we study a fourth-order stochastic heat equation with homogeneous Neumann boundary conditions and double-parameter fractional noises. We formally replace the random perturbation by a family of noisy inputs depending on a parameter \(n\in {\mathbb {N}}\) which approximates the noises. Then we provided sufficient conditions ensuring that the real-valued mild solution of the fourth-order stochastic heat equation driven by this family of noises converges in law, in the space of \(C([0,T]\times [0,\pi ])\) of continuous functions, to the solution of a class of fourth-order stochastic heat equation driven by fractional noises.
      PubDate: 2017-04-01
      DOI: 10.1007/s40840-017-0457-0
      Issue No: Vol. 40, No. 2 (2017)
       
  • Leibniz Algebras Whose Semisimple Part is Related to $$sl_2$$ s l 2
    • Authors: L. M. Camacho; S. Gómez-Vidal; B. A. Omirov; I. A. Karimjanov
      Pages: 599 - 615
      Abstract: In this paper we identify the structure of complex finite-dimensional Leibniz algebras with associated Lie algebras \(sl_2^1\oplus sl_2^2\oplus \dots \oplus sl_2^s\oplus R,\) where R is a solvable radical. The classifications of such Leibniz algebras in the cases \(\mathrm{dim} R=2, 3\) and \(\mathrm{dim} I\ne 3\) have been obtained. Moreover, we classify Leibniz algebras with \(L/I\cong sl_2^1\oplus sl_2^2\) and some conditions on ideal \(I=\mathrm{id}<[x,x] \ \ x\in L>\) .
      PubDate: 2017-04-01
      DOI: 10.1007/s40840-017-0458-z
      Issue No: Vol. 40, No. 2 (2017)
       
  • Reflexive–EP Elements in Rings
    • Authors: Dijana Mosić
      Pages: 655 - 664
      Abstract: We define and characterize reflexive–EP elements in rings, that is elements which commute with their image-kernel (p, q)-inverse.
      PubDate: 2017-04-01
      DOI: 10.1007/s40840-017-0445-4
      Issue No: Vol. 40, No. 2 (2017)
       
  • Leibniz Algebras Admitting a Multiplicative Basis
    • Authors: Antonio J. Calderón Martín
      Pages: 679 - 695
      Abstract: In the literature, many of the descriptions of different classes of Leibniz algebras \((L, [\cdot , \cdot ])\) have been made by giving the multiplication table on the elements of a basis \({{\mathcal {B}}}=\{v_{k}\}_{k \in K}\) of L, in such a way that for any \(i,j \in K\) we have that \([v_i,v_j] = \lambda _{i,j} [v_j,v_i]\in {{\mathbb {F}}} v_k\) for some \(k \in K\) , where \({{\mathbb {F}}}\) denotes the base field and \(\lambda _{i,j} \in {{\mathbb {F}}}\) . In order to give an unifying viewpoint of all these classes of algebras, we introduce the more general category of Leibniz algebras admitting a multiplicative basis and study its structure. We show that if a Leibniz algebra L admits a multiplicative basis, then it is the direct sum \(L=\bigoplus \nolimits _{\alpha }{{{\mathcal {I}}}}_{\alpha }\) with any \({{\mathcal {I}}}_{\alpha }\) a well-described ideal of L admitting a multiplicative basis inherited from \({\mathcal {B}}\) . Also the \({{\mathcal {B}}}\) -simplicity of L is characterized in terms of the multiplicative basis.
      PubDate: 2017-04-01
      DOI: 10.1007/s40840-017-0446-3
      Issue No: Vol. 40, No. 2 (2017)
       
  • Characterizations of Finite Groups with $$\mathbf{P}$$ P -Fusion of
           Squarefree Type
    • Authors: Richard Foote; Matthew Welz
      Pages: 697 - 706
      Abstract: For G a finite group and p a prime this paper proves two theorems under hypotheses that restrict the index of the subgroup generated by every p-element x in certain subgroups generated by pairs of its conjugates. Under one set of hypotheses G is shown to be supersolvable. Simple groups satisfying a complementary fusion-theoretic hypothesis are classified.
      PubDate: 2017-04-01
      DOI: 10.1007/s40840-017-0448-1
      Issue No: Vol. 40, No. 2 (2017)
       
  • Geometries Induced by Logarithmic Oscillations as Examples of Gromov
           Hyperbolic Spaces
    • Authors: Wladimir G. Boskoff; Bogdan D. Suceavă
      Pages: 707 - 733
      Abstract: We explore the connection between the geometries generated by logarithmic oscillations and the class of metric spaces satisfying the Gromov hyperbolicity condition. We investigate the most fundamental examples, inspired from classical geometries, e.g. the Euclidean distance on the infinite strip or Hilbert’s distance on the unit disk. We continue our study with the Barbilian’s distance, which historically appeared as a natural extension of a model of hyperbolic geometry. We introduce and investigate a new metric, called the stabilizing metric. In a natural development, we explore a class of extensions of this distance which, under some analytic conditions, produces infinitely many new examples of Gromov hyperbolic metric spaces. Using similar procedures, we construct Vuorinen’s stabilizing metric and its extensions, and we discuss their Gromov hyperbolicity.
      PubDate: 2017-04-01
      DOI: 10.1007/s40840-017-0479-7
      Issue No: Vol. 40, No. 2 (2017)
       
  • On Lie Ideals with Generalized Derivations and Non-commutative Banach
           Algebras
    • Authors: Nadeem Ur Rehman; Mohd Arif Raza
      Pages: 747 - 764
      Abstract: Let R be a prime ring of characteristic different from 2, L be a non-central Lie ideal of R and m, n be the fixed positive integers. If R admits a generalized derivation F associated with a deviation d such that \(F(u^2)^m -d(u)^{2n}\in Z(R)\) for all \(u \in L\) , then R satisfies \(s_4\) , the standard identity in four variables. Moreover, we also examine the case when R is semiprime ring. Finally, as an application we obtain some range inclusion results of continuous or spectrally bounded generalized derivations on Banach algebras.
      PubDate: 2017-04-01
      DOI: 10.1007/s40840-017-0453-4
      Issue No: Vol. 40, No. 2 (2017)
       
  • Universal Approximation of Reduced Fuzzy Basis Function With Ruspini
           Partitioning
    • Authors: Kah Wai Cheah; Noor Atinah Ahmad
      Pages: 783 - 794
      Abstract: In this paper, Ruspini partitioning is used to represent the reduced form of the fuzzy basis function. Among all the predefined membership functions, Triangular-shaped membership function is used to represent the whole partitioned space of a given fuzzy system. According to the formulation, it shows that the reduced fuzzy basis function using Ruspini partitioning is indeed a strong fuzzy partition and a complete rule base method. By using the Stone–Weierstrass Theorem, for any real continuous function on a compact set, the reduced fuzzy basis function is proven to be a universal approximator at arbitrary accuracy.
      PubDate: 2017-04-01
      DOI: 10.1007/s40840-015-0269-z
      Issue No: Vol. 40, No. 2 (2017)
       
  • Stability and Bifurcation of Two-dimensional Stochastic Differential
           Equations with Multiplicative Excitations
    • Authors: Chaoliang Luo; Shangjiang Guo
      Pages: 795 - 817
      Abstract: In this paper, the stability and bifurcation of a class of two-dimensional stochastic differential equations with multiplicative excitations are investigated. Firstly, we employ Taylor expansions, polar coordinate transformation and stochastic averaging method to transform the original system into an Itô averaging diffusion system. Secondly, we apply the maximum Lyapunov exponent and the singular boundary theory to analyze the local and global stability of the fixed point. Thirdly, we explore the stochastic dynamical bifurcation of the Itô averaging amplitude equation by studying the qualitative changes of invariant measures, and investigate the phenomenological bifurcation by utilizing Fokker–Planck equation. Finally, an example is given to illustrate the effectiveness of our analyzing procedure.
      PubDate: 2017-04-01
      DOI: 10.1007/s40840-016-0313-7
      Issue No: Vol. 40, No. 2 (2017)
       
  • Radius Problems for Ratios of Janowski Starlike Functions with Their
           Derivatives
    • Authors: Shelly Verma; V. Ravichandran
      Pages: 819 - 840
      Abstract: Let \(-1 \le B<A \le 1\) and \(F= f/f'\) for normalized locally univalent functions f. For analytic function p on the open unit disc \(\mathbb {D}\) with \(p(0)=1\) and satisfying the subordination \(p(z) \prec (1+A z)/(1+B z)\) , we determine bounds for \( p(z)- z p'(z)-1 \) and \( z p'(z) /{{\mathrm{Re\,}}}p(z)\) . As an application, we investigate the radius problem for F to satisfy \( F'(z)(z/F(z))^2-1 <1\) , where f is a Janowski starlike function and the radius of univalence of F when f is a starlike function of order \(\alpha \) . Also, we have discussed the radius of starlikeness of F when f is a Janowski starlike function with fixed second coefficient. Apart from the radius problems, we give the sharp coefficient bounds of F when f is a Janowski starlike function and a sufficient condition for starlikeness of f when F is a Janowski starlike function. Our results generalize some of the earlier known results.
      PubDate: 2017-04-01
      DOI: 10.1007/s40840-016-0363-x
      Issue No: Vol. 40, No. 2 (2017)
       
  • Certain Subclasses of Meromorphically Bi-Univalent Functions
    • Authors: Young Jae Sim; Oh Sang Kwon
      Pages: 841 - 855
      Abstract: For real \(\alpha \) and \(\beta \) such that \(0 \le \alpha {<} 1 {<} \beta \) , we denote by \(\varSigma _{s}(\alpha ,\beta )\) and \(\varSigma _{c}^{0}(\alpha ,\beta )\) the class of meromorphic univalent functions f such that \(\alpha < Re \left\{ zf'(z)/f(z) \right\} {<} \beta \) in \(\varDelta \) and \(\alpha {<} \mathfrak {R}\left\{ f'(z) \right\} {<} \beta \) in \(\varDelta \) , where \(\varDelta {=} \left\{ z \in \mathbb {C} : 1< z <\infty \right\} \) , respectively. In the present investigation, estimates on the coefficients of functions of the above classes are investigated. Furthermore, we consider the Fekete-Szegö problem for functions in the above classes. Also, the estimates of the initial coefficients of functions from some subclasses of meromorphic bi-univalent functions are given.
      PubDate: 2017-04-01
      DOI: 10.1007/s40840-016-0335-1
      Issue No: Vol. 40, No. 2 (2017)
       
  • Convex Combinations of Planar Harmonic Mappings Realized Through
           Convolutions with Half-Strip Mappings
    • Authors: Stacey Muir
      Pages: 857 - 880
      Abstract: Recent investigations into what geometric properties are preserved under the convolution of two planar harmonic mappings on the open unit disk \({\mathbb {D}}\) have typically involved half-plane and strip mappings. These results rely on having a convolution that is locally univalent and sense-preserving on \({\mathbb {D}}\) , and thus, much focus has been on trying to satisfy this condition. We introduce a family of right half-strip harmonic mappings, \(\Psi _c : {\mathbb {D}}\rightarrow {\mathbb {C}}\) , \(c>0\) , and consider the convolution \(\Psi _c * f\) for a harmonic mapping \(f = h +\overline{g}: {\mathbb {D}}\rightarrow {\mathbb {C}}\) . We prove it is sufficient for \(h \pm g\) to be starlike for \(\Psi _c *f\) to be locally univalent and sense-preserving. Moreover, \(\Psi _c * f\) decomposes into a convex combination of two harmonic mappings, one of which is f itself. This decomposition is key in addressing mapping properties of the convolution, and from it, we produce a family of convex octagonal harmonic mappings as well some other families of convex harmonic mappings. Additionally, motivated by the construction of \(\Psi _c\) , we introduce a generalized harmonic Bernardi integral operator. We demonstrate convolution preserving properties and a weak subordination relationship for this extended operator.
      PubDate: 2017-04-01
      DOI: 10.1007/s40840-016-0336-0
      Issue No: Vol. 40, No. 2 (2017)
       
  • A Note on Generalized Mercer’s Inequality
    • Authors: Asif R. Khan; Josip Pečarić; Marjan Praljak
      Pages: 881 - 889
      Abstract: We give an integral version and a refinement of M. Niezgoda’s extension of the variant of Jensen’s inequality given by A. McD. Mercer.
      PubDate: 2017-04-01
      DOI: 10.1007/s40840-017-0449-0
      Issue No: Vol. 40, No. 2 (2017)
       
  • A Generalization of the Banach-Steinhaus Theorem for Finite Part Limits
    • Authors: Ricardo Estrada; Jasson Vindas
      Pages: 907 - 918
      Abstract: It is well known, as follows from the Banach-Steinhaus theorem, that if a sequence \(\left\{ y_{n}\right\} _{n=1}^{\infty }\) of linear continuous functionals in a Fréchet space converges pointwise to a linear functional Y,  \(Y\left( x\right) =\lim _{n\rightarrow \infty }\left\langle y_{n} ,x\right\rangle \) for all x,  then Y is actually continuous. In this article, we prove that in a Fréchet space the continuity of Y still holds if Y is the finite part of the limit of \(\left\langle y_{n},x\right\rangle \) as \(n\rightarrow \infty .\) We also show that the continuity of finite part limits holds for other classes of topological vector spaces, such as LF-spaces, DFS-spaces, and DFS \(^{*}\) -spaces and give examples where it does not hold.
      PubDate: 2017-04-01
      DOI: 10.1007/s40840-017-0450-7
      Issue No: Vol. 40, No. 2 (2017)
       
  • An Algorithm for Vector Optimization Problems
    • Authors: Xun-Hua Gong; Fang Liu
      Pages: 919 - 929
      Abstract: In this paper, we consider of finding efficient solution and weakly efficient solution for nonconvex vector optimization problems. When X and Y are normed spaces, F is an anti-Lipschitz mapping from X to Y, and the ordering cone is regular, we present an algorithm to guarantee that the generated sequence converges to an efficient solution with respect to normed topology. If the domain of the mapping is compact, we prove that the generated sequence converges to an efficient solution with respect to normed topology without requiring that mapping is anti-Lipschitz. We also give an algorithm to guarantee that the generated sequence converges to a weakly efficient solution with respect to normed topology.
      PubDate: 2017-04-01
      DOI: 10.1007/s40840-017-0455-2
      Issue No: Vol. 40, No. 2 (2017)
       
  • Poisson Approximation for a Sum of Negative Binomial Random Variables
    • Authors: K. Teerapabolarn
      Pages: 931 - 939
      Abstract: The Stein–Chen method is used to determine uniform and non-uniform bounds on the ratio between the distribution function of a sum of independent negative binomial random variables and a Poisson distribution function with mean \(\lambda = \sum _{i=1}^nr_iq_i\) , where \(r_i\) and \(p_i=1-q_i\) are parameters of each negative binomial distribution. With these bounds, it indicates that the Poisson distribution function with this mean can be used as an estimate of the independent summands when all \(q_i\) are small or \(\lambda \) is small. Finally, some numerical examples for each result are given.
      PubDate: 2017-04-01
      DOI: 10.1007/s40840-016-0328-0
      Issue No: Vol. 40, No. 2 (2017)
       
  • Blow-up of Solutions for a System of Higher-Order Nonlinear Kirchhoff-Type
           Equations
    • Authors: Yaojun Ye
      Abstract: The initial-boundary value problem for a system of higher-order nonlinear Kirchhoff-type equations with damping and source terms in bounded domain is studied. We prove a global nonexistence result for certain solutions under positive initial energy.
      PubDate: 2017-02-20
      DOI: 10.1007/s40840-017-0452-5
       
  • On Right Orthogonal Classes and Cohomology Over Ding–Chen Rings
    • Authors: Tiwei Zhao; Yunge Xu
      Abstract: In this paper, we investigate the properties of right orthogonal modules of \({{\mathscr {C}}}\) , where \({{\mathscr {C}}}\) is a class of left R-modules. As an application, we investigate the properties of right orthogonal modules of Ding injective left R-modules, and present various characterizations of semisimple and von Neumann regular rings and so on. Moreover, we also consider another cohomology, strong Tate cohomology, which connects the usual cohomology with the Ding cohomology.
      PubDate: 2017-02-13
      DOI: 10.1007/s40840-017-0461-4
       
  • Hyers–Ulam Stability of a Class Second Differential Equation
           $$y''(x)+p(x)y'(x)+q(x)y(x)=F(y(x))$$ y ′ ′ ( x ) + p ( x ) y ′ ( x
           ) + q ( x ) y ( x ) = F ( y ( x ) )
    • Authors: Xiangkui Zhao; Xingjuan Zhang; Weigao Ge
      Abstract: In this paper, we study the Hyers–Ulam–Rassias stability and Hyers–Ulam stability for a class second differential equation $$\begin{aligned} y''(x)+p(x)y'(x)+q(x)y(x)=F(y(x)) \end{aligned}$$ by a generalized fixed point theorem. Moreover, we show that the differential equation $$\begin{aligned} y'(x)=F(x,y(x)) \end{aligned}$$ has not the Hyers–Ulam stability on an infinite interval.
      PubDate: 2017-02-10
      DOI: 10.1007/s40840-017-0454-3
       
 
 
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