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  Subjects -> EDUCATION (Total: 2042 journals)
    - ADULT EDUCATION (24 journals)
    - COLLEGE AND ALUMNI (9 journals)
    - E-LEARNING (24 journals)
    - EDUCATION (1732 journals)
    - HIGHER EDUCATION (131 journals)
    - INTERNATIONAL EDUCATION PROGRAMS (4 journals)
    - ONLINE EDUCATION (31 journals)
    - SCHOOL ORGANIZATION (13 journals)
    - SPECIAL EDUCATION AND REHABILITATION (36 journals)
    - TEACHING METHODS AND CURRICULUM (38 journals)

EDUCATION (1732 journals)                  1 2 3 4 5 6 7 8 | Last

Showing 1 - 200 of 857 Journals sorted alphabetically
#Tear : Revista de Educação, Ciência e Tecnologia     Open Access   (Followers: 2)
(Pensamiento), (palabra) y obra     Open Access   (Followers: 2)
21. Yüzyılda Eğitim Ve Toplum Eğitim Bilimleri Ve Sosyal Araştırmalar Dergisi     Open Access  
@tic. revista d'innovació educativa     Open Access  
Abant İzzet Baysal Üniversitesi Eğitim Fakültesi Dergisi     Open Access   (Followers: 2)
About Campus     Hybrid Journal   (Followers: 6)
Academic Medicine     Hybrid Journal   (Followers: 62)
Academic Psychiatry     Full-text available via subscription   (Followers: 26)
Academic Questions     Hybrid Journal   (Followers: 8)
Academy of Educational Leadership Journal     Full-text available via subscription   (Followers: 60)
Academy of Management Learning and Education     Full-text available via subscription   (Followers: 54)
Accounting & Finance     Hybrid Journal   (Followers: 54)
Accounting Education: An International Journal     Hybrid Journal   (Followers: 21)
Açıköğretim Uygulamaları ve Araştırmaları Dergisi     Open Access  
ACM Transactions on Computing Education (TOCE)     Hybrid Journal   (Followers: 6)
Acta Didactica Norge     Open Access   (Followers: 2)
Acta Educationis Generalis     Open Access  
Acta Scientiarum. Education     Open Access  
Action in Teacher Education     Hybrid Journal   (Followers: 62)
Action Learning: Research and Practice     Hybrid Journal   (Followers: 40)
Action Research     Hybrid Journal   (Followers: 46)
Active Learning in Higher Education     Hybrid Journal   (Followers: 286)
Actualidades Pedagógicas     Open Access  
Adelphi series     Hybrid Journal   (Followers: 13)
Adiyaman University Journal of Educational Sciences     Open Access   (Followers: 1)
Administration & Society     Hybrid Journal   (Followers: 13)
Administrative Science Quarterly     Full-text available via subscription   (Followers: 180)
Adult Education Quarterly     Hybrid Journal   (Followers: 163)
Advanced Education     Open Access   (Followers: 10)
Advances in Building Education     Open Access   (Followers: 3)
Advances in Health Sciences Education     Hybrid Journal   (Followers: 29)
Advances in High Energy Physics     Open Access   (Followers: 19)
Advances in School Mental Health Promotion     Partially Free   (Followers: 8)
AERA Open     Open Access   (Followers: 8)
Africa Education Review     Partially Free   (Followers: 25)
African Journal of Chemical Education     Open Access   (Followers: 3)
African Journal of Educational Studies in Mathematics and Sciences     Full-text available via subscription   (Followers: 5)
African Journal of Health Professions Education     Open Access   (Followers: 6)
African Journal of Research in Mathematics, Science and Technology Education     Full-text available via subscription   (Followers: 8)
Agora     Full-text available via subscription   (Followers: 4)
AGORA Magazine     Open Access  
Ahi Evran Üniversitesi Kırşehir Eğitim Fakültesi Dergisi     Open Access  
Ahmad Dahlan Journal of English Studies     Open Access   (Followers: 2)
AIDS Education and Prevention     Full-text available via subscription   (Followers: 7)
Ainedidaktiikka     Open Access  
Akadémiai Értesítö     Full-text available via subscription  
Aksiologiya : Jurnal Pengabdian Kepada Masyarakat     Open Access  
AKSIOMA Journal of Mathematics Education     Open Access   (Followers: 1)
Al-Idarah : Jurnal Kependidikan Islam     Open Access  
Al-Jabar : Jurnal Pendidikan Matematika     Open Access   (Followers: 1)
Al-Mudarris : Journal of Education     Open Access  
Al-Tadris : Jurnal Pendidikan Bahasa Arab     Open Access  
Al-Tadzkiyyah : Jurnal Pendidikan Islam     Open Access  
Alan Eğitimi Araştırmaları Dergisi     Open Access  
Alexandria : Revista de Educação em Ciência e Tecnologia     Open Access  
Alsic : Apprentissage des Langues et Systèmes d'Information et de Communication     Open Access   (Followers: 16)
Alteridad     Open Access  
Amasya Universitesi Egitim Fakültesi Dergisi     Open Access  
Ambiente & Educação : Revista de Educação Ambiental     Open Access  
American Annals of the Deaf     Full-text available via subscription   (Followers: 13)
American Biology Teacher     Full-text available via subscription   (Followers: 14)
American Educational Research Journal     Hybrid Journal   (Followers: 166)
American Journal of Business Education     Open Access   (Followers: 12)
American Journal of Distance Education     Hybrid Journal   (Followers: 34)
American Journal of Education     Full-text available via subscription   (Followers: 198)
American Journal of Educational Research     Open Access   (Followers: 63)
American Journal of Health Education     Hybrid Journal   (Followers: 31)
American Journal of Physics     Full-text available via subscription   (Followers: 53)
American String Teacher     Full-text available via subscription   (Followers: 1)
Ana Dili Eğitimi Dergisi / Journal of Mother Tongue Education     Open Access  
Anadolu Journal Of Educational Sciences International     Open Access  
ANALES de la Universidad Central del Ecuador     Open Access   (Followers: 3)
Annali dell'Universita di Ferrara     Hybrid Journal  
Annals of Dyslexia     Hybrid Journal   (Followers: 10)
Annals of Modern Education     Full-text available via subscription   (Followers: 4)
Apertura. Revista de innovación educativa‏     Open Access   (Followers: 2)
Apex : New Zealand Journal of Gifted Children     Open Access   (Followers: 1)
Applied Environmental Education & Communication     Hybrid Journal   (Followers: 17)
Applied Measurement in Education     Hybrid Journal   (Followers: 9)
Arabia     Open Access  
Art Design & Communication in Higher Education     Hybrid Journal   (Followers: 23)
Arts and Humanities in Higher Education     Hybrid Journal   (Followers: 37)
Arts Education Policy Review     Hybrid Journal   (Followers: 5)
Artseduca : Revista electrónica de educación en las ARTES     Open Access  
ASHE Higher Education Reports     Hybrid Journal   (Followers: 16)
Asia Pacific Education Review     Hybrid Journal   (Followers: 12)
Asia Pacific Journal of Education     Hybrid Journal   (Followers: 21)
Asia-Pacific Education Researcher     Hybrid Journal   (Followers: 13)
Asia-Pacific Journal of Health, Sport and Physical Education     Hybrid Journal   (Followers: 9)
Asia-Pacific Journal of Teacher Education     Hybrid Journal   (Followers: 25)
Asian Association of Open Universities Journal     Open Access   (Followers: 1)
Asian Education and Development Studies     Hybrid Journal   (Followers: 5)
Asian Journal of English Language Teaching     Full-text available via subscription   (Followers: 14)
Asian Journal of Legal Education     Full-text available via subscription   (Followers: 4)
ASp     Open Access   (Followers: 3)
Assessing Writing     Hybrid Journal   (Followers: 11)
Assessment & Evaluation in Higher Education     Hybrid Journal   (Followers: 151)
Assessment for Effective Intervention     Hybrid Journal   (Followers: 14)
Assessment in Education: Principles, Policy & Practice     Hybrid Journal   (Followers: 43)
Assessment Update     Hybrid Journal   (Followers: 5)
AStA Wirtschafts- und Sozialstatistisches Archiv     Hybrid Journal   (Followers: 5)
At-Ta'dib Jurnal Kependidikan Islam     Open Access  
At-Taqaddum     Open Access  
At-Turats     Open Access  
Athenea Digital     Open Access  
Aula Abierta     Open Access   (Followers: 1)
Aula de Encuentro     Open Access  
Australasian Journal of Educational Technology     Open Access   (Followers: 19)
Australasian Journal of Gifted Education     Full-text available via subscription   (Followers: 6)
Australasian Journal of Special Education     Full-text available via subscription   (Followers: 8)
Australasian Marketing Journal (AMJ)     Hybrid Journal   (Followers: 4)
Australian Art Education     Full-text available via subscription   (Followers: 7)
Australian Educational and Developmental Psychologist, The     Full-text available via subscription   (Followers: 8)
Australian Educational Computing     Open Access   (Followers: 1)
Australian Educational Researcher     Hybrid Journal   (Followers: 26)
Australian Journal of Adult Learning     Full-text available via subscription   (Followers: 16)
Australian Journal of Career Development     Hybrid Journal   (Followers: 3)
Australian Journal of Dyslexia and Learning Difficulties     Full-text available via subscription   (Followers: 8)
Australian Journal of Education     Hybrid Journal   (Followers: 36)
Australian Journal of Environmental Education     Full-text available via subscription   (Followers: 8)
Australian Journal of Indigenous Education, The     Full-text available via subscription   (Followers: 10)
Australian Journal of Learning Difficulties     Hybrid Journal   (Followers: 5)
Australian Journal of Music Education     Full-text available via subscription   (Followers: 4)
Australian Journal of Public Administration     Hybrid Journal   (Followers: 456)
Australian Journal of Teacher Education     Open Access   (Followers: 22)
Australian Mathematics Teacher, The     Full-text available via subscription   (Followers: 6)
Australian Primary Mathematics Classroom     Full-text available via subscription   (Followers: 4)
Australian Screen Education Online     Full-text available via subscription   (Followers: 2)
Australian TAFE Teacher     Full-text available via subscription   (Followers: 4)
Australian Universities' Review, The     Full-text available via subscription   (Followers: 4)
Autism     Hybrid Journal   (Followers: 286)
Avaliação : Revista da Avaliação da Educação Superior (Campinas)     Open Access  
Azalea: Journal of Korean Literature & Culture     Full-text available via subscription   (Followers: 4)
Bahastra     Open Access  
Balkan Region Conference on Engineering and Business Education     Open Access   (Followers: 1)
BC TEAL Journal     Open Access  
BELIA : Early Childhood Education Papers     Open Access   (Followers: 8)
BELT - Brazilian English Language Teaching Journal     Open Access   (Followers: 4)
Berkeley Review of Education     Open Access   (Followers: 6)
Biblioteca Escolar em Revista     Open Access  
Biblioteka i Edukacja     Open Access   (Followers: 4)
Bildung und Erziehung     Hybrid Journal   (Followers: 5)
Bioedukasi : Jurnal Pendidikan Biologi FKIP UM Metro     Open Access  
Bioma : Jurnal Ilmiah Biologi     Open Access  
Biosaintifika : Journal of Biology & Biology Education     Open Access   (Followers: 7)
Biosfer : Jurnal Biologi dan Pendidikan Biologi     Open Access  
Biosfer : Jurnal Tadris Biologi     Open Access  
BMC Medical Education     Open Access   (Followers: 43)
BMJ Simulation & Technology Enhanced Learning     Hybrid Journal   (Followers: 10)
Boletim Cearense de Educação e História da Matemática     Open Access  
Boletim de Educação Matemática     Open Access  
Boletim Técnico do Senac     Open Access  
British Educational Research Journal     Hybrid Journal   (Followers: 195)
British Journal of Educational Studies     Hybrid Journal   (Followers: 159)
British Journal of Educational Technology     Hybrid Journal   (Followers: 152)
British Journal of Music Education     Hybrid Journal   (Followers: 24)
British Journal of Religious Education     Hybrid Journal   (Followers: 9)
British Journal of Sociology of Education     Hybrid Journal   (Followers: 54)
British Journal of Special Education     Hybrid Journal   (Followers: 48)
British Journal of Visual Impairment     Hybrid Journal   (Followers: 12)
Brookings Trade Forum     Full-text available via subscription   (Followers: 3)
Buletin Fisika     Open Access  
Bulletin of the Council for Research in Music Education     Full-text available via subscription   (Followers: 6)
Business, Management and Education     Open Access   (Followers: 17)
Caderno Brasileiro de Ensino de Física     Open Access  
Caderno de Educação     Open Access  
Caderno Intersabares     Open Access  
Cadernos CEDES     Open Access   (Followers: 1)
Cadernos de Educação     Open Access  
Cadernos de Pesquisa     Open Access  
Cadernos de Pesquisa     Open Access   (Followers: 2)
Cadernos de Pesquisa em Educação     Open Access   (Followers: 1)
Cadmo     Full-text available via subscription   (Followers: 1)
Cahiers de la recherche sur l'éducation et les savoirs     Open Access   (Followers: 4)
Cakrawala Pendidikan     Open Access  
Calidad en la educación     Open Access   (Followers: 1)
Cambridge Journal of Education     Hybrid Journal   (Followers: 96)
Campus Legal Advisor     Hybrid Journal   (Followers: 2)
Campus Security Report     Hybrid Journal  
Canadian and International Education     Open Access   (Followers: 8)
Canadian Journal for New Scholars in Education/ Revue canadienne des jeunes chercheures et chercheurs en éducation     Open Access   (Followers: 7)
Canadian Journal for the Scholarship of Teaching and Learning     Open Access   (Followers: 15)
Canadian Journal of Education : Revue canadienne de l'éducation     Open Access   (Followers: 8)
Canadian Journal of Higher Education     Open Access   (Followers: 25)
Canadian Journal of Learning and Technology / La revue canadienne de l’apprentissage et de la technologie     Open Access   (Followers: 17)
Canadian Journal of School Psychology     Hybrid Journal   (Followers: 10)
Canadian Journal of Science, Mathematics and Technology Education     Hybrid Journal   (Followers: 19)
Career Development and Transition for Exceptional Individuals     Hybrid Journal   (Followers: 8)
Catalejos. Revista sobre lectura, formación de lectores y literatura para niños     Open Access  
Catharsis : Journal of Arts Education     Open Access  
CELE Exchange, Centre for Effective Learning Environments     Full-text available via subscription   (Followers: 1)
Cendekia : Jurnal Kependidikan dan Kemasyarakatan     Open Access  
Change: The Magazine of Higher Learning     Hybrid Journal   (Followers: 16)
Changing English: Studies in Culture and Education     Hybrid Journal   (Followers: 4)
Charrette     Open Access  
Chemical Engineering Education     Full-text available via subscription   (Followers: 2)
Chemistry Education Research and Practice     Free   (Followers: 4)
Chemistry in Education     Open Access   (Followers: 9)
Chi'e : Journal of Japanese Learning and Teaching     Open Access   (Followers: 3)
Child Language Teaching and Therapy     Hybrid Journal   (Followers: 32)

        1 2 3 4 5 6 7 8 | Last

Journal Cover
Annali dell'Universita di Ferrara
Journal Prestige (SJR): 0.429
Number of Followers: 0  
 
  Hybrid Journal Hybrid journal (It can contain Open Access articles)
ISSN (Print) 0430-3202 - ISSN (Online) 1827-1510
Published by Springer-Verlag Homepage  [2352 journals]
  • q - Lupas Kantorovich operators based on Polya distribution
    • Authors: P. N. Agrawal; Pooja Gupta
      Pages: 1 - 23
      Abstract: The purpose of the present paper is to introduce a Kantorovich modification of the q-analogue of the Stancu operators defined by Nowak (J Math Anal Appl 350:50–55, 2009). We study a local and a direct approximation theorem by means of the Ditzian–Totik modulus of smoothness. Further A-statistical convergence properties of these operators are investigated. Next, a bivariate generalization of these operators is introduced and its rate of convergence is discussed with the aid of the partial and complete modulus of continuity and the Peetre‘s K-functional.
      PubDate: 2018-05-01
      DOI: 10.1007/s11565-017-0291-1
      Issue No: Vol. 64, No. 1 (2018)
       
  • On the existence of the biharmonic Green kernels and the adjoint
           biharmonic functions
    • Authors: Abderrahim Aslimani; Imad El Ghazi; Mohamed El Kadiri; Sabah Haddad
      Pages: 25 - 46
      Abstract: We study the existence and the regularity of the biharmonic Green kernel in a Brelot biharmonic space whose associated harmonic spaces have Green kernels. We show by some examples that this kernel does not always exist. We then introduce and study the adjoint of the given biharmonic space. This study was initiated by Smyrnelis, however, it seems that several results were incomplete and we clarify them here.
      PubDate: 2018-05-01
      DOI: 10.1007/s11565-017-0289-8
      Issue No: Vol. 64, No. 1 (2018)
       
  • Estimates of anisotropic Sobolev spaces with mixed norms for the Stokes
           system in a half-space
    • Authors: Tongkeun Chang; Kyungkeun Kang
      Pages: 47 - 82
      Abstract: We are concerned with the non-stationary Stokes system with non-homogeneous external force and non-zero initial data in \({\mathbb {R}}^n_+ \times (0,T)\) . We obtain new estimates of solutions including pressure in terms of mixed anisotropic Sobolev spaces. As an application, some anisotropic Sobolev estimates are presented for weak solutions of the Navier–Stokes equations in a half-space in dimension three.
      PubDate: 2018-05-01
      DOI: 10.1007/s11565-017-0287-x
      Issue No: Vol. 64, No. 1 (2018)
       
  • Existence of positive periodic solutions of nonlinear neutral differential
           systems with variable delays
    • Authors: Hocine Gabsi; Abdelouaheb Ardjouni; Ahcene Djoudi
      Pages: 83 - 97
      Abstract: In this work we use some mixed techniques of the Mawhin coincidence degree theory and fixed point theorem to prove the existence of positive periodic solutions of delay systems. As a consequence, we offer existence criteria and sufficient conditions for existence of periodic solutions to the systems with feedback control. When these results are applied to some special delay bio-mathematics models, some new results are obtained, and many known results are improved.
      PubDate: 2018-05-01
      DOI: 10.1007/s11565-017-0292-0
      Issue No: Vol. 64, No. 1 (2018)
       
  • Characterization of some derivations on von Neumann algebras via left
           centralizers
    • Authors: A. Hosseini
      Pages: 99 - 110
      Abstract: Let \(\mathfrak {M}\) be a von Neumann algebra, and let \(\mathfrak {T}:\mathfrak {M} \rightarrow \mathfrak {M}\) be a bounded linear map satisfying \(\mathfrak {T}(P^{2}) = \mathfrak {T}(P)P + \Psi (P,P)\) for each projection P of \(\mathfrak {M}\) , where \(\Psi :\mathfrak {M} \times \mathfrak {M} \rightarrow \mathfrak {M}\) is a bi-linear map. If \(\Psi \) is a bounded l-semi Hochschild 2-cocycle, then \(\mathfrak {T}\) is a left centralizer associated with \(\Psi \) . By applying this conclusion, we offer a characterization of left \(\sigma \) -centralizers, generalized derivations and generalized \(\sigma \) -derivations on von Neumann algebras. Moreover, it is proved that if \(\mathfrak {M}\) is a commutative von Neumann algebra and \(\sigma :\mathfrak {M} \rightarrow \mathfrak {M}\) is an endomorphism, then every bi- \(\sigma \) -derivation \(D:\mathfrak {M} \times \mathfrak {M} \rightarrow \mathfrak {M}\) is identically zero.
      PubDate: 2018-05-01
      DOI: 10.1007/s11565-017-0290-2
      Issue No: Vol. 64, No. 1 (2018)
       
  • Multilinear dyadic operators and their commutators
    • Authors: Ishwari Kunwar
      Pages: 111 - 144
      Abstract: We obtain a generalized paraproduct decomposition of the pointwise product of two or more functions that naturally gives rise to multilinear dyadic paraproducts and Haar multipliers. We then study the boundedness properties of these multilinear operators and their commutators with dyadic BMO functions. We also characterize the dyadic BMO functions via the boundedness of (a) certain paraproducts, and (b) the commutators of multilinear Haar multipliers and paraproduct operators.
      PubDate: 2018-05-01
      DOI: 10.1007/s11565-016-0260-0
      Issue No: Vol. 64, No. 1 (2018)
       
  • On the semistability of certain Lazarsfeld–Mukai bundles on abelian
           surfaces
    • Authors: Poornapushkala Narayanan
      Pages: 145 - 164
      Abstract: Let \(X=\mathscr {J}(\widetilde{\mathscr {C}})\) , the Jacobian of a genus 2 curve \(\widetilde{\mathscr {C}}\) over \({\mathbb {C}}\) , and let Y be the associated Kummer surface. Consider an ample line bundle \(L=\mathscr {O}(m\widetilde{\mathscr {C}})\) on X for an even number m, and its descent to Y, say \(L'\) . We show that any dominating component of \({\mathscr {W}}^1_{d}( L' )\) corresponds to \(\mu _{L'}\) -stable Lazarsfeld–Mukai bundles on Y. Further, for a smooth curve \(C\in L \) and a base-point free \(g^1_d\) on C, say (A, V), we study the \(\mu _L\) -semistability of the rank-2 Lazarsfeld–Mukai bundle associated to (C, (A, V)) on X. Under certain assumptions on C and the \(g^1_d\) , we show that the above Lazarsfeld–Mukai bundles are \(\mu _L\) -semistable.
      PubDate: 2018-05-01
      DOI: 10.1007/s11565-017-0277-z
      Issue No: Vol. 64, No. 1 (2018)
       
  • Some results on a special case of a general continued fraction of
           Ramanujan
    • Authors: Nipen Saikia; Chayanika Boruah
      Pages: 165 - 183
      Abstract: We derive a new special case C(q) of a general continued fraction recorded by Ramanujan in his Lost Notebook. We give a representation of the continued fraction C(q) as a quotient of Dedekind eta-function and then use it to prove modular identities connecting C(q) with each of the continued fractions \(C(-q)\) , \(C(q^{2})\) , \(C(q^{3})\) , \(C(q^{5})\) , \(C(q^{7})\) , \(C(q^{11})\) , \(C(q^{13})\) and \(C(q^{17})\) . We also prove general theorems for the explicit evaluation of the continued fraction C(q) by using Ramanujan’s class invariants.
      PubDate: 2018-05-01
      DOI: 10.1007/s11565-017-0283-1
      Issue No: Vol. 64, No. 1 (2018)
       
  • Microscopic modeling and analysis of collective decision making: equality
           bias leads suboptimal solutions
    • Authors: Pierluigi Vellucci; Mattia Zanella
      Pages: 185 - 207
      Abstract: We discuss a novel microscopic model for collective decision-making interacting multi-agent systems. In particular we are interested in modeling a well known phenomena in the experimental literature called equality bias, where agents tend to behave in the same way as if they were as good, or as bad, as their partner. We analyze the introduced problem and we prove the suboptimality of the collective decision-making in the presence of equality bias. Numerical experiments are addressed in the last section.
      PubDate: 2018-05-01
      DOI: 10.1007/s11565-017-0280-4
      Issue No: Vol. 64, No. 1 (2018)
       
  • A note on regularity of the pressure in the Navier–Stokes system
    • Authors: Sanja Friganović
      Abstract: In this note we improve the standard regularity of the dynamic part of the pressure in the Navier–Stokes system. Using the theory of elliptic equations with \(L^1\) right-hand side we prove that, in addition to be in \(L^2\) , the dynamic pressure belongs to \(W^{1,\alpha }_{loc} \) with \(1<\alpha <\frac{n}{n-1}\) , in case of Dirichlet boundary condition. For pressure boundary condition the dynamic pressure is proved to be in \(W^{1,\alpha } \) . As a consequence, for the force \(\mathbf{f} \in L^q (\Omega )^n \) and \(q>n /2 \) the pressure turns out to be continuous.
      PubDate: 2018-05-11
      DOI: 10.1007/s11565-018-0302-x
       
  • Stable hypersurfaces via the first eigenvalue of the anisotropic Laplacian
           operator
    • Authors: Jonatan Floriano da Silva; Henrique Fernandes de Lima; Marco Antonio Lázaro Velásquez
      Abstract: In this paper we provide a characterization for stable hypersurfaces with constant anisotropic mean curvature immersed in the Euclidean space \(\mathbb {R}^{n+1}\) through the analysis of the first eigenvalue of the anisotropic Laplacian operator.
      PubDate: 2018-04-11
      DOI: 10.1007/s11565-018-0301-y
       
  • Effective adjunction theory
    • Authors: Marco Andreatta; Claudio Fontanari
      Abstract: Here we investigate the property of effectivity for adjoint divisors. Among others, we prove the following results: A projective variety X with at most canonical singularities is uniruled if and only if for each very ample Cartier divisor H on X we have \(H^0(X, m_0K_X+H)=0\) for some \(m_0=m_0(H)>0\) . Let X be a projective 4-fold, L an ample divisor and t an integer with \(t \ge 3\) . If \(K_X+tL\) is pseudo-effective, then \(H^0(X, K_X+tL) \ne 0\) .
      PubDate: 2018-02-09
      DOI: 10.1007/s11565-018-0300-z
       
  • On $$\mathcal {SSH}$$ SSH -subgroups of finite groups
    • Authors: T. M. Al-Gafri; S. K. Nauman
      Abstract: Let G be a finite group. A subgroup H of G is s-permutable in G if H permutes with every Sylow subgroup of G. A subgroup H of G is called an \(\mathcal {SSH}\) -subgroup in G if G has an s-permutable subgroup K such that \(H^{sG} = HK\) and \(H^g \cap N_K (H) \leqslant H\) , for all \(g \in G\) , where \(H^{sG}\) is the intersection of all s-permutable subgroups of G containing H. We study the structure of finite groups under the assumption that the maximal or the minimal subgroups of Sylow subgroups of some normal subgroups of G are \(\mathcal {SSH}\) -subgroups in G. Several recent results from the literature are improved and generalized.
      PubDate: 2018-02-05
      DOI: 10.1007/s11565-018-0299-1
       
  • Comparing predator–prey models with hidden and explicit resources
    • Authors: Luciana Mafalda Elias de Assis; Malay Banerjee; Ezio Venturino
      Abstract: In this paper two mathematical models are proposed and analyzed to elucidate the influence on a generalist predator of its hidden and explicit resources. Boundedness of the system’s trajectories, feasibility, local and global stability of the equilibria for both models are established, as well as possible local bifurcations. The findings indicate that the relevant behaviour of the system, including switching of stability, extinction and persistence of the involved populations, depends mainly on the reproduction rate of the favorite prey. To achieve full ecosystem survival some balance between the respective grazing pressures exerted by the predator on the prey populations needs to be maintained, while higher grazing pressure just on one species always leads to its extinction.
      PubDate: 2018-01-22
      DOI: 10.1007/s11565-018-0298-2
       
  • Pairings and related symmetry notions
    • Authors: G. Chiaselotti; T. Gentile; F. Infusino
      Abstract: In this paper, we give a purely mathematical generalization of an information table. We call pairing on a given set \(\Omega \) a triple \(\mathfrak {P}=(U, F, \Lambda )\) , where U and \(\Lambda \) are non-empty sets and \(F:U\times \Omega \rightarrow \Lambda \) is a map. We provide several examples of pairings: graphs, digraphs, metric spaces, group actions and vector spaces endowed with a bilinear form. Moreover, we reinterpret the usual notion of indiscernibility (with respect to a fixed attribute subset of an information table) in terms of local symmetry on U and, then, we study a global version of symmetry, that we called indistinguishability. In particular, we interpret the latter relation as the symmetrization of a pre-order \(\le _{\mathfrak {P}}\) , that describes the symmetry transmission between subsets of \(\Omega \) . Hence, we introduce a global average of symmetry transmission and studied it for some basic digraph families. Finally, we prove that the partial order of any finite lattice can be described in terms of the above pre-order.
      PubDate: 2018-01-15
      DOI: 10.1007/s11565-018-0297-3
       
  • Some elementary examples of quartics with finite-dimensional motive
    • Authors: Robert Laterveer
      Pages: 315 - 321
      Abstract: This small note contains some easy examples of quartic hypersurfaces that have finite-dimensional motive. As an illustration, we verify a conjecture of Voevodsky (concerning smash-equivalence) for some of these special quartics.
      PubDate: 2017-11-01
      DOI: 10.1007/s11565-016-0263-x
      Issue No: Vol. 63, No. 2 (2017)
       
  • Height estimates and half-space type theorems in weighted product spaces
           with nonnegative Bakry–Émery–Ricci curvature
    • Authors: Henrique F. de Lima; Márcio S. Santos
      Pages: 323 - 332
      Abstract: We prove height estimates concerning compact hypersurfaces with nonzero constant weighted mean curvature and whose boundary is contained into a slice of a weighted product space of nonnegative Bakry–Émery–Ricci curvature. As applications of our estimates, we obtain half-space type results related to complete noncompact hypersurfaces properly immersed in such an ambient space.
      PubDate: 2017-11-01
      DOI: 10.1007/s11565-016-0268-5
      Issue No: Vol. 63, No. 2 (2017)
       
  • On the growth and approximation of entire functions represented by
           Laplace–Stieltjes’ transformation
    • Authors: Chhaya Singhal; G. S. Srivastava
      Pages: 365 - 376
      Abstract: In the present paper, we obtain the characterization of various growth parameters of an entire function F(s) represented by Laplace–Stieltjes transformation in terms of the rate of decrease of \(E_n ( {F,\beta } ),\) where \(E_n ( {F,\beta } )\) represents the error in approximating the function F(s) by exponential polynomials.
      PubDate: 2017-11-01
      DOI: 10.1007/s11565-017-0272-4
      Issue No: Vol. 63, No. 2 (2017)
       
  • Stability of a Kirchhoff–Roe scheme for two-dimensional linearized
           Euler systems
    • Authors: Emmanuel Franck; Laurent Gosse
      Abstract: By applying Helmholtz decomposition, the unknowns of a linearized Euler system can be recast as solutions of uncoupled linear wave equations. Accordingly, the Kirchhoff expression of the exact solutions is recast as a time-marching, Lax–Wendroff type, numerical scheme for which consistency with one-dimensional upwinding is checked. This discretization, involving spherical means, is set up on a 2D uniform Cartesian grid, so that the resulting numerical fluxes can be shown to be conservative. Moreover, semi-discrete stability in the \(H^s\) norms and vorticity dissipation are established, along with practical second-order accuracy. Finally, some relations with former “shape functions” and “symmetric potential schemes” are highlighted.
      PubDate: 2017-12-06
      DOI: 10.1007/s11565-017-0296-9
       
  • Homological equivalence relations on an algebraic curve
    • Authors: Lucio Guerra
      Abstract: We study the collection of homological equivalence relations on a fixed curve. We construct a moduli space for pairs consisting of a curve of genus g and a homological equivalence relation of degree n on the curve, and a classifying set for homological equivalence relations of degree n on a fixed curve, modulo automorphisms of the curve. We identify a special type of homological equivalence relations, and we characterize the special homological equivalence relations in terms of the existence of elliptic curves in the Jacobian of the curve.
      PubDate: 2017-11-23
      DOI: 10.1007/s11565-017-0295-x
       
 
 
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