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  Subjects -> COMPUTER SCIENCE (Total: 1964 journals)
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COMPUTER SCIENCE (1149 journals)                  1 2 3 4 5 6 | Last

Showing 1 - 200 of 872 Journals sorted alphabetically
3D Printing and Additive Manufacturing     Full-text available via subscription   (Followers: 10)
Abakós     Open Access   (Followers: 2)
Academy of Information and Management Sciences Journal     Full-text available via subscription   (Followers: 55)
ACM Computing Surveys     Hybrid Journal   (Followers: 19)
ACM Journal on Computing and Cultural Heritage     Hybrid Journal   (Followers: 5)
ACM Journal on Emerging Technologies in Computing Systems     Hybrid Journal   (Followers: 8)
ACM Transactions on Accessible Computing (TACCESS)     Hybrid Journal   (Followers: 2)
ACM Transactions on Algorithms (TALG)     Hybrid Journal   (Followers: 12)
ACM Transactions on Applied Perception (TAP)     Hybrid Journal   (Followers: 4)
ACM Transactions on Architecture and Code Optimization (TACO)     Hybrid Journal   (Followers: 5)
ACM Transactions on Autonomous and Adaptive Systems (TAAS)     Hybrid Journal   (Followers: 6)
ACM Transactions on Computation Theory (TOCT)     Hybrid Journal   (Followers: 10)
ACM Transactions on Computational Logic (TOCL)     Hybrid Journal   (Followers: 2)
ACM Transactions on Computer Systems (TOCS)     Hybrid Journal   (Followers: 16)
ACM Transactions on Computer-Human Interaction     Hybrid Journal   (Followers: 11)
ACM Transactions on Computing Education (TOCE)     Hybrid Journal   (Followers: 2)
ACM Transactions on Design Automation of Electronic Systems (TODAES)     Hybrid Journal   (Followers: 1)
ACM Transactions on Economics and Computation     Hybrid Journal  
ACM Transactions on Embedded Computing Systems (TECS)     Hybrid Journal   (Followers: 4)
ACM Transactions on Information Systems (TOIS)     Hybrid Journal   (Followers: 19)
ACM Transactions on Intelligent Systems and Technology (TIST)     Hybrid Journal   (Followers: 9)
ACM Transactions on Interactive Intelligent Systems (TiiS)     Hybrid Journal   (Followers: 4)
ACM Transactions on Multimedia Computing, Communications, and Applications (TOMCCAP)     Hybrid Journal   (Followers: 6)
ACM Transactions on Reconfigurable Technology and Systems (TRETS)     Hybrid Journal   (Followers: 6)
ACM Transactions on Sensor Networks (TOSN)     Hybrid Journal   (Followers: 8)
ACM Transactions on Speech and Language Processing (TSLP)     Hybrid Journal   (Followers: 9)
ACM Transactions on Storage     Hybrid Journal  
ACS Applied Materials & Interfaces     Full-text available via subscription   (Followers: 17)
Acta Automatica Sinica     Full-text available via subscription   (Followers: 3)
Acta Universitatis Cibiniensis. Technical Series     Open Access  
Ad Hoc Networks     Hybrid Journal   (Followers: 11)
Adaptive Behavior     Hybrid Journal   (Followers: 10)
Advanced Engineering Materials     Hybrid Journal   (Followers: 19)
Advanced Science Letters     Full-text available via subscription   (Followers: 4)
Advances in Adaptive Data Analysis     Hybrid Journal   (Followers: 7)
Advances in Artificial Intelligence     Open Access   (Followers: 13)
Advances in Artificial Neural Systems     Open Access   (Followers: 3)
Advances in Calculus of Variations     Hybrid Journal   (Followers: 2)
Advances in Catalysis     Full-text available via subscription   (Followers: 4)
Advances in Computational Mathematics     Hybrid Journal   (Followers: 14)
Advances in Computer Engineering     Open Access   (Followers: 3)
Advances in Computer Science : an International Journal     Open Access   (Followers: 10)
Advances in Computing     Open Access   (Followers: 2)
Advances in Data Analysis and Classification     Hybrid Journal   (Followers: 39)
Advances in Engineering Software     Hybrid Journal   (Followers: 22)
Advances in Geosciences (ADGEO)     Open Access   (Followers: 9)
Advances in Human Factors/Ergonomics     Full-text available via subscription   (Followers: 20)
Advances in Human-Computer Interaction     Open Access   (Followers: 17)
Advances in Materials Sciences     Open Access   (Followers: 12)
Advances in Operations Research     Open Access   (Followers: 11)
Advances in Parallel Computing     Full-text available via subscription   (Followers: 7)
Advances in Porous Media     Full-text available via subscription   (Followers: 3)
Advances in Remote Sensing     Open Access   (Followers: 29)
Advances in Science and Research (ASR)     Open Access   (Followers: 6)
AEU - International Journal of Electronics and Communications     Hybrid Journal   (Followers: 7)
African Journal of Information and Communication     Open Access   (Followers: 7)
African Journal of Mathematics and Computer Science Research     Open Access   (Followers: 3)
AI EDAM     Hybrid Journal  
Air, Soil & Water Research     Open Access   (Followers: 6)
AIS Transactions on Human-Computer Interaction     Open Access   (Followers: 5)
Algebras and Representation Theory     Hybrid Journal  
Algorithms     Open Access   (Followers: 9)
American Journal of Computational and Applied Mathematics     Open Access   (Followers: 2)
American Journal of Computational Mathematics     Open Access   (Followers: 4)
American Journal of Information Systems     Open Access   (Followers: 4)
American Journal of Sensor Technology     Open Access  
Anais da Academia Brasileira de Ciências     Open Access   (Followers: 2)
Analog Integrated Circuits and Signal Processing     Hybrid Journal   (Followers: 5)
Analysis in Theory and Applications     Hybrid Journal  
Animation Practice, Process & Production     Hybrid Journal   (Followers: 4)
Annals of Combinatorics     Hybrid Journal   (Followers: 3)
Annals of Data Science     Hybrid Journal   (Followers: 5)
Annals of Mathematics and Artificial Intelligence     Hybrid Journal   (Followers: 5)
Annals of Pure and Applied Logic     Open Access   (Followers: 2)
Annals of Software Engineering     Hybrid Journal   (Followers: 10)
Annual Reviews in Control     Hybrid Journal   (Followers: 6)
Applicable Algebra in Engineering, Communication and Computing     Hybrid Journal   (Followers: 2)
Applied and Computational Harmonic Analysis     Full-text available via subscription   (Followers: 2)
Applied Artificial Intelligence: An International Journal     Hybrid Journal   (Followers: 10)
Applied Categorical Structures     Hybrid Journal   (Followers: 2)
Applied Computational Intelligence and Soft Computing     Open Access   (Followers: 10)
Applied Computer Systems     Open Access   (Followers: 1)
Applied Informatics     Open Access  
Applied Mathematics and Computation     Hybrid Journal   (Followers: 30)
Applied Medical Informatics     Open Access   (Followers: 9)
Applied Numerical Analysis & Computational Mathematics     Hybrid Journal   (Followers: 5)
Applied Numerical Mathematics     Hybrid Journal   (Followers: 5)
Applied Soft Computing     Hybrid Journal   (Followers: 11)
Applied Spatial Analysis and Policy     Hybrid Journal   (Followers: 3)
Architectural Theory Review     Hybrid Journal   (Followers: 2)
Archive of Applied Mechanics     Hybrid Journal   (Followers: 4)
Archive of Numerical Software     Open Access  
Archives and Museum Informatics     Hybrid Journal   (Followers: 104)
Archives of Computational Methods in Engineering     Hybrid Journal   (Followers: 4)
arq: Architectural Research Quarterly     Hybrid Journal   (Followers: 7)
Artifact     Hybrid Journal   (Followers: 2)
Artificial Life     Hybrid Journal   (Followers: 5)
Asia Pacific Journal on Computational Engineering     Open Access  
Asia-Pacific Journal of Information Technology and Multimedia     Open Access   (Followers: 1)
Asian Journal of Control     Hybrid Journal  
Assembly Automation     Hybrid Journal   (Followers: 1)
at - Automatisierungstechnik     Hybrid Journal   (Followers: 1)
Australian Educational Computing     Open Access  
Automatic Control and Computer Sciences     Hybrid Journal   (Followers: 3)
Automatic Documentation and Mathematical Linguistics     Hybrid Journal   (Followers: 4)
Automatica     Hybrid Journal   (Followers: 8)
Automation in Construction     Hybrid Journal   (Followers: 6)
Autonomous Mental Development, IEEE Transactions on     Hybrid Journal   (Followers: 6)
Basin Research     Hybrid Journal   (Followers: 3)
Behaviour & Information Technology     Hybrid Journal   (Followers: 50)
Bioinformatics     Hybrid Journal   (Followers: 179)
Biomedical Engineering     Hybrid Journal   (Followers: 14)
Biomedical Engineering and Computational Biology     Open Access   (Followers: 11)
Biomedical Engineering, IEEE Reviews in     Full-text available via subscription   (Followers: 15)
Biomedical Engineering, IEEE Transactions on     Hybrid Journal   (Followers: 24)
Briefings in Bioinformatics     Hybrid Journal   (Followers: 39)
British Journal of Educational Technology     Hybrid Journal   (Followers: 90)
Broadcasting, IEEE Transactions on     Hybrid Journal   (Followers: 9)
CALCOLO     Hybrid Journal  
Calphad     Hybrid Journal  
Canadian Journal of Electrical and Computer Engineering     Full-text available via subscription   (Followers: 11)
Capturing Intelligence     Full-text available via subscription  
Catalysis in Industry     Hybrid Journal   (Followers: 1)
CEAS Space Journal     Hybrid Journal  
Cell Communication and Signaling     Open Access   (Followers: 1)
Central European Journal of Computer Science     Hybrid Journal   (Followers: 5)
Chaos, Solitons & Fractals     Hybrid Journal   (Followers: 1)
Chemometrics and Intelligent Laboratory Systems     Hybrid Journal   (Followers: 15)
ChemSusChem     Hybrid Journal   (Followers: 5)
China Communications     Full-text available via subscription   (Followers: 6)
Chinese Journal of Catalysis     Full-text available via subscription   (Followers: 1)
CIN Computers Informatics Nursing     Full-text available via subscription   (Followers: 10)
Circuits and Systems     Open Access   (Followers: 12)
Clean Air Journal     Full-text available via subscription   (Followers: 2)
CLEI Electronic Journal     Open Access  
Clin-Alert     Hybrid Journal   (Followers: 1)
Cluster Computing     Hybrid Journal   (Followers: 1)
Cognitive Computation     Hybrid Journal   (Followers: 4)
COMBINATORICA     Hybrid Journal  
Combinatorics, Probability and Computing     Hybrid Journal   (Followers: 3)
Combustion Theory and Modelling     Hybrid Journal   (Followers: 12)
Communication Methods and Measures     Hybrid Journal   (Followers: 12)
Communication Theory     Hybrid Journal   (Followers: 16)
Communications Engineer     Hybrid Journal   (Followers: 1)
Communications in Algebra     Hybrid Journal   (Followers: 2)
Communications in Computational Physics     Full-text available via subscription   (Followers: 2)
Communications in Partial Differential Equations     Hybrid Journal   (Followers: 1)
Communications of the ACM     Full-text available via subscription   (Followers: 44)
Communications of the Association for Information Systems     Open Access   (Followers: 18)
COMPEL: The International Journal for Computation and Mathematics in Electrical and Electronic Engineering     Hybrid Journal   (Followers: 3)
Complex Adaptive Systems Modeling     Open Access  
Complex Analysis and Operator Theory     Hybrid Journal   (Followers: 2)
Complexity     Hybrid Journal   (Followers: 6)
Composite Materials Series     Full-text available via subscription   (Followers: 8)
Computación y Sistemas     Open Access  
Computation     Open Access  
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 and Structural Biotechnology Journal     Open Access   (Followers: 1)
Computational and Theoretical Chemistry     Hybrid Journal   (Followers: 10)
Computational Astrophysics and Cosmology     Open Access  
Computational Biology and Chemistry     Hybrid Journal   (Followers: 9)
Computational Chemistry     Open Access   (Followers: 2)
Computational Cognitive Science     Open Access  
Computational Complexity     Hybrid Journal   (Followers: 4)
Computational Condensed Matter     Open Access  
Computational Ecology and Software     Open Access   (Followers: 8)
Computational Economics     Hybrid Journal   (Followers: 9)
Computational Geosciences     Hybrid Journal   (Followers: 12)
Computational Linguistics     Open Access   (Followers: 20)
Computational Management Science     Hybrid Journal  
Computational Mathematics and Modeling     Hybrid Journal   (Followers: 7)
Computational Mechanics     Hybrid Journal   (Followers: 4)
Computational Methods and Function Theory     Hybrid Journal  
Computational Molecular Bioscience     Open Access   (Followers: 1)
Computational Optimization and Applications     Hybrid Journal   (Followers: 7)
Computational Particle Mechanics     Hybrid Journal   (Followers: 1)
Computational Research     Open Access   (Followers: 1)
Computational Science and Discovery     Full-text available via subscription   (Followers: 2)
Computational Science and Techniques     Open Access  
Computational Statistics     Hybrid Journal   (Followers: 14)
Computational Statistics & Data Analysis     Hybrid Journal   (Followers: 26)
Computer     Full-text available via subscription   (Followers: 65)
Computer Aided Surgery     Hybrid Journal   (Followers: 3)
Computer Applications in Engineering Education     Hybrid Journal   (Followers: 6)
Computer Communications     Hybrid Journal   (Followers: 8)
Computer Engineering and Applications Journal     Open Access   (Followers: 4)
Computer Journal     Hybrid Journal   (Followers: 6)
Computer Methods in Applied Mechanics and Engineering     Hybrid Journal   (Followers: 19)
Computer Methods in Biomechanics and Biomedical Engineering     Hybrid Journal   (Followers: 7)
Computer Methods in the Geosciences     Full-text available via subscription  
Computer Music Journal     Hybrid Journal   (Followers: 10)
Computer Physics Communications     Hybrid Journal   (Followers: 2)
Computer Science - Research and Development     Hybrid Journal   (Followers: 6)
Computer Science and Engineering     Open Access   (Followers: 15)
Computer Science and Information Technology     Open Access   (Followers: 7)
Computer Science Education     Hybrid Journal   (Followers: 10)
Computer Science Journal     Open Access   (Followers: 19)
Computer Science Master Research     Open Access   (Followers: 6)

        1 2 3 4 5 6 | Last

Journal Cover Analysis in Theory and Applications
  [SJR: 0.193]   [H-I: 5]   [0 followers]  Follow
    
   Hybrid Journal Hybrid journal (It can contain Open Access articles)
   ISSN (Print) 1573-8175 - ISSN (Online) 1672-4070
   Published by Springer-Verlag Homepage  [2334 journals]
  • Generalized wavelets and inversion of the radon transform on the laguerre
           hypergroup
    • Authors: Bai Linglan; He Jianxun
      Pages: 48 - 62
      Abstract: Abstract Let X=R + n ×R denote the underlying manifold of polyradial functions on the Heisenberg group Hn. We construct a generalized translation on X=R + n ×R, and establish the Plancherel formula on L2(X, dμ). Using the Gelfand transform we give the condition of generalized wavelets on L2(X,dμ). Moreover, we show the reconstruction formulas for wavelet packet trnasforms and an inversion formula of the Radon transform on X.
      PubDate: 2013-09-18
      DOI: 10.1007/bf02845274
      Issue No: Vol. 18, No. 4 (2013)
       
  • A regularization method for approximating the inverse Laplace transform
    • Authors: A. Al-Shuaibi
      Pages: 58 - 65
      Abstract: Abstract A new method for approximating the inerse Laplace transform is presented. We first change our Laplace transform equation into a convolution type integral equation, where Tikhonov regularization techniques and the Fourier transformation are easily applied. We finally obtain a regularized approximation to the inverse Laplace transform as finite sum $$f\left( t \right) \cong \sum\limits_{b \approx 0}^N {b_k \left( \alpha \right)\frac{{d^h G\left( x \right)}} {{dx^h }}}$$ , where bk(a) are precalculated and tabulated regularization coefficients, G(x)=ex(ex) and g(x) is the given Laplace transform of f(t). Error bounds together with an algorithm to calculate the coefficients bk (a) and some examples are also discussed. Perturbed data problems are not included.
      PubDate: 2013-09-18
      DOI: 10.1007/bf02836897
      Issue No: Vol. 13, No. 1 (2013)
       
  • Some results on topical functions and upward sets
    • Authors: H. Hosni; M. R. Haddai; H. Mazaheri
      Pages: 301 - 308
      Abstract: Abstract The purpose of this paper is to introduce and discuss the concept of topical functions on upward sets. We give characterizations of topical functions in terms of upward sets.
      PubDate: 2011-12-01
      DOI: 10.1007/s10496-011-0301-6
      Issue No: Vol. 27, No. 4 (2011)
       
  • The boundedness of Toeplitz-type Operators on vanishing-morrey spaces
    • Authors: Xiaoniu Cao; Dongxiang Chen
      Pages: 309 - 319
      Abstract: Abstract In this note, we prove that the Toeplitz-type Operator Θ α b generated by the generalized fractional integral, Calderón-Zygmund operator and VMO funtion is bounded from L p,λ (R n ) to L q,µ(R n ). We also show that under some conditions Θ α b f ∈ VL q, µ(B R ), the vanishing-Morrey space.
      PubDate: 2011-12-01
      DOI: 10.1007/s10496-011-0309-y
      Issue No: Vol. 27, No. 4 (2011)
       
  • Almost homomorphisms between unital        class="a-plus-plus">C*-algebras: A fixed point
           approach
    • Authors: M. Eshaghi Gordji; S. Kaboli Gharetapeh; M. Bidkham; T. Karimi; M. Aghaei
      Pages: 320 - 331
      Abstract: Abstract Let A,B be two unital C*-algebras. By using fixed pint methods, we prove that every almost unital almost linear mapping h: A → B which satisfies h(2 n uy)= h(2 n u)h(y) for all u ∈ U(A), all y ∈ A, and all n=0,1,2, …, is a homomorphism. Also, we establish the generalized Hyers-Ulam-Rassias stability of *-homomorphisms on unital C*-algebras.
      PubDate: 2011-12-01
      DOI: 10.1007/s10496-011-0320-3
      Issue No: Vol. 27, No. 4 (2011)
       
  • A simple proof of the chaoticity of shift map under a new definition of
           chaos
    • Authors: Indranil Bhaumik; Binayak S. Choudhury; Basudeb Mukhopadhyay
      Pages: 332 - 339
      Abstract: Abstract Recently, Du has given a new strong definition of chaos by using the shift map. In this paper, we give a proof of the main theorem by constructing a dense uncountable invariant subset of the symbol space Σ2 containing transitive points in a simpler way with the help of a different metric. We also provide two examples, which support this new definition.
      PubDate: 2011-12-01
      DOI: 10.1007/s10496-011-0332-z
      Issue No: Vol. 27, No. 4 (2011)
       
  • Some integral inequalities for the polar derivative of a polynomial
    • Authors: Abdullah Mir; Sajad Amin Baba
      Pages: 340 - 350
      Abstract: Abstract If P(z) is a polynomial of degree n which does not vanish in z < 1, then it is recently proved by Rather [Jour. Ineq. Pure and Appl. Math., 9 (2008), Issue 4, Art. 103] that for every γ> 0 and every real or complex number α with α ≥ 1, $\begin{gathered} \left\{ {\int_0^{2\pi } {\left {D_\alpha P(e^{i\theta } )} \right ^\gamma d\theta } } \right\}^{{1 \mathord{\left/ {\vphantom {1 \gamma }} \right. \kern-\nulldelimiterspace} \gamma }} \leqslant n( \alpha + 1)C_\gamma \left\{ {\int_0^{2\pi } {\left {P(e^{i\theta } )} \right ^\gamma d\theta } } \right\}^{{1 \mathord{\left/ {\vphantom {1 \gamma }} \right. \kern-\nulldelimiterspace} \gamma }} , \hfill \\ C_\gamma \left\{ {\frac{1} {{2\pi }}\int_0^{2\pi } {\left {1 + e^{i\beta } } \right ^\gamma d\beta } } \right\}^{ - {1 \mathord{\left/ {\vphantom {1 \gamma }} \right. \kern-\nulldelimiterspace} \gamma }} \hfill \\ \end{gathered} $ where D α P(z) denotes the polar derivative of P(z) with respect to α. In this paper we prove a result which not only provides a refinement of the above inequality but also gives a result of Aziz and Dawood [J. Approx. Theory, 54 (1988), 306–313] as a special case.
      PubDate: 2011-12-01
      DOI: 10.1007/s10496-011-0340-z
      Issue No: Vol. 27, No. 4 (2011)
       
  • On double sine and cosine transforms, Lipschitz and Zygmund classes
    • Authors: Vanda Fülöp; Ferenc Móricaz
      Pages: 351 - 364
      Abstract: Abstract We consider complex-valued functions f ∈ L 1(R + 2 ), where R +:= [0,∞), and prove sufficient conditions under which the double sine Fourier transform $\hat f_{ss} $ and the double cosine Fourier transform $\hat f_{cc} $ belong to one of the two-dimensional Lipschitz classes Lip(α, β) for some 0 < α, β ≤ 1; or to one of the Zygmund classes Zyg(α, β) for some 0 < α, β ≤ 2. These sufficient conditions are best possible in the sense that they are also necessary for nonnegative-valued functions f ∈ L 1(R + 2 ).
      PubDate: 2011-12-01
      DOI: 10.1007/s10496-011-0351-9
      Issue No: Vol. 27, No. 4 (2011)
       
  • Boundedness of commutators for Marcinkiewicz integrals on weighted
           Herz-type Hardy spaces
    • Authors: Cuilan Wu
      Pages: 365 - 376
      Abstract: Abstract In this paper, the authors study the boundedness of the operator µ Ω b , the commutator generated by a function b ∈ Lip β (R n )(0 < β < 1) and the Marcinkiewicz integral µΩ on weighted Herz-type Hardy spaces.
      PubDate: 2011-12-01
      DOI: 10.1007/s10496-011-0364-4
      Issue No: Vol. 27, No. 4 (2011)
       
  • Harmonic mappings of the hexagasket to the circle
    • Authors: Donglei Tang
      Pages: 377 - 386
      Abstract: Abstract Harmonic mappings from the hexagasket to the circle are described in terms of boundary values and topological data. Explicit formulas are also given for the energy of the mapping. We have generalized the results in [10].
      PubDate: 2011-12-01
      DOI: 10.1007/s10496-011-0377-z
      Issue No: Vol. 27, No. 4 (2011)
       
  • A theoretical framework for the calculation of Hausdorff measure —
           Self-similar set satisfying OSC
    • Authors: Zuoling Zhou; Li Feng
      Pages: 387 - 398
      Abstract: Abstract A theoretical framework for the calculation of Hausdorff measure of self-similar sets satisfying OSC has been established.
      PubDate: 2011-12-01
      DOI: 10.1007/s10496-011-0387-x
      Issue No: Vol. 27, No. 4 (2011)
       
  • Approximation and shape-preserving properties of q-Stancu operator
    • Authors: Lianying Yun; Rongwei Wang
      Pages: 201 - 210
      Abstract: Abstract We introduce the definition of q-Stancu operator and investigate its approximation and shape-preserving property. With the help of the sign changes of f (x) and L n = f (f,q;x) the shape-preserving property of q-Stancu operator is obtained.
      PubDate: 2011-09-01
      DOI: 10.1007/s10496-011-0201-9
      Issue No: Vol. 27, No. 3 (2011)
       
  • A new BLO estimate for maximal singular integral operators
    • Authors: Qiquan Fang; Xianliang Shi
      Pages: 211 - 219
      Abstract: Abstract In this paper, we extend Hu and Zhang’s results in [2] to different case.
      PubDate: 2011-09-01
      DOI: 10.1007/s10496-011-0211-7
      Issue No: Vol. 27, No. 3 (2011)
       
  • Some applications of BP-theorem in approximation theory
    • Authors: I. Sadeqi; R. Zarghami
      Pages: 220 - 223
      Abstract: Abstract In this paper we apply Bishop-Phelps property to show that if X is a Banach space and G ⊆ X is the maximal subspace so that G ⊥ = {x* ∈ X* x*(y)=0; Åy ∈ G} is an L-summand in X*, then L 1(Ω,G) is contained in a maximal proximinal subspace of L 1(Ω,X).
      PubDate: 2011-09-01
      DOI: 10.1007/s10496-011-0220-6
      Issue No: Vol. 27, No. 3 (2011)
       
  • Measures of weak noncompactness and fixed point theory for 1-set weakly
           contractive operators on unbounded domains
    • Authors: Shaoyuan Xu; Afif Ben Amar
      Pages: 224 - 238
      Abstract: Abstract The main purpose of this paper is to prove a collection of new fixed point theorems and existence theorems for the nonlinear operator equation F(x) =αx (α ≥ 1) for so-called 1-set weakly contractive operators on unbounded domains in Banach spaces. We also introduce the concept of weakly semi-closed operator at the origin and obtain a series of new fixed point theorems and the existence theorems for the nonlinear operator equation F(x) = αx (α ≥ 1) for such class of operators. As consequences, the main results generalize and improve the relevant results, which are obtained by O’Regan and A. Ben Amar and M. Mnif in 1998 and 2009 respectively. In addition, we get the famous fixed point theorems of Leray-Schauder, Altman, Petryshyn and Rothe type in the case of weakly sequentially continuous, 1-set weakly contractive (µ-nonexpansive) and weakly semi-closed operators at the origin and their generalizations. The main condition in our results is formulated in terms of axiomatic measures of weak compactness.
      PubDate: 2011-09-01
      DOI: 10.1007/s10496-011-0224-2
      Issue No: Vol. 27, No. 3 (2011)
       
  • Weighted approximation of        class="a-plus-plus">r-monotone functions on the
           real line by Bernstein operators
    • Authors: Laiyi Zhu; Xiaojie Zhu; Xing Liu
      Pages: 239 - 250
      Abstract: Abstract In this paper, we give error estimates for the weighted approximation of r-monotone functions on the real line with Freud weights by Bernstein-type operators.
      PubDate: 2011-09-01
      DOI: 10.1007/s10496-011-0239-8
      Issue No: Vol. 27, No. 3 (2011)
       
  • A note on H        class="a-plus-plus stack">        class="a-plus-plus">        class="a-plus-plus">w        class="a-plus-plus">        class="a-plus-plus">p
           
    -boundedness of Riesz transforms and        class="a-plus-plus">θ -Calderón-Zygmund
           operators through molecular characterization
    • Authors: Luong Dang Ky
      Pages: 251 - 264
      Abstract: Abstract Let 0 < p ≤ 1 and w in the Muckenhoupt class A 1. Recently, by using the weighted atomic decomposition and molecular characterization, Lee, Lin and Yang[11] established that the Riesz transforms R j , j = 1,2, …,n, are bounded on H w p (R n ). In this note we extend this to the general case of weight w in the Muckenhoupt class A ∞ through molecular characterization. One difficulty, which has not been taken care in [11], consists in passing from atoms to all functions in H w p (R n ). Furthermore, the H w p -boundedness of θ-Calderón-Zygmund operators are also given through molecular characterization and atomic decomposition.
      PubDate: 2011-09-01
      DOI: 10.1007/s10496-011-0251-z
      Issue No: Vol. 27, No. 3 (2011)
       
  • Uniform meyer solution to the three dimensional cauchy problem for laplace
           equation
    • Authors: Jinru Wang; Weifang Wang
      Pages: 265 - 277
      Abstract: Abstract We consider the three dimensional Cauchy problem for the Laplace equation $\left\{ \begin{gathered} u_{xx} (x,y,z) + u_{yy} (x,y,z) + u_{zz} (x,y,z) = 0,x \in R,y \in R,0 < z \leqslant 1, \hfill \\ u(x,y,0) = g(x,y),x \in R,y \in R, \hfill \\ u_z (x,y,0) = 0,x \in R,y \in R, \hfill \\ \end{gathered} \right. $ where the data is given at z = 0 and a solution is sought in the region x,y ∈ R,0 < z < 1. The problem is ill-posed, the solution (if it exists) doesn’t depend continuously on the initial data. Using Galerkin method and Meyer wavelets, we get the uniform stable wavelet approximate solution. Furthermore, we shall give a recipe for choosing the coarse level resolution.
      PubDate: 2011-09-01
      DOI: 10.1007/s10496-011-0265-6
      Issue No: Vol. 27, No. 3 (2011)
       
  • Bmo boundedness for banach space valued singular integrals
    • Authors: Chunjie Zhang
      Pages: 278 - 287
      Abstract: Abstract In this paper, we consider a class of Banach space valued singular integrals. The L p boundedness of these operators has already been obtained. We shall discuss their boundedness from BMO to BMO. As applications, we get BMO boundedness for the classic g-function and the Marcinkiewicz integral. Some known results are improved.
      PubDate: 2011-09-01
      DOI: 10.1007/s10496-011-0278-1
      Issue No: Vol. 27, No. 3 (2011)
       
  • On convergence of general Gamma type operators
    • Authors: Harun Karsli
      Pages: 288 - 300
      Abstract: Abstract The present paper deals with the new type of Gamma operators, here we estimate the rate of pointwise convergence of these new Gamma type operators M n,k for functions of bounded variation, by using some techniques of probability theory.
      PubDate: 2011-09-01
      DOI: 10.1007/s10496-011-0288-z
      Issue No: Vol. 27, No. 3 (2011)
       
 
 
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