for Journals by Title or ISSN
for Articles by Keywords
  Subjects -> MATHEMATICS (Total: 955 journals)
    - APPLIED MATHEMATICS (82 journals)
    - GEOMETRY AND TOPOLOGY (20 journals)
    - MATHEMATICS (706 journals)
    - MATHEMATICS (GENERAL) (43 journals)
    - NUMERICAL ANALYSIS (22 journals)

MATHEMATICS (706 journals)                  1 2 3 4 | Last

Showing 1 - 200 of 538 Journals sorted alphabetically
Abakós     Open Access   (Followers: 4)
Abhandlungen aus dem Mathematischen Seminar der Universitat Hamburg     Hybrid Journal   (Followers: 3)
Academic Voices : A Multidisciplinary Journal     Open Access   (Followers: 2)
Accounting Perspectives     Full-text available via subscription   (Followers: 7)
ACM Transactions on Algorithms (TALG)     Hybrid Journal   (Followers: 15)
ACM Transactions on Computational Logic (TOCL)     Hybrid Journal   (Followers: 3)
ACM Transactions on Mathematical Software (TOMS)     Hybrid Journal   (Followers: 6)
ACS Applied Materials & Interfaces     Full-text available via subscription   (Followers: 27)
Acta Applicandae Mathematicae     Hybrid Journal   (Followers: 1)
Acta Mathematica     Hybrid Journal   (Followers: 11)
Acta Mathematica Hungarica     Hybrid Journal   (Followers: 2)
Acta Mathematica Scientia     Full-text available via subscription   (Followers: 5)
Acta Mathematica Sinica, English Series     Hybrid Journal   (Followers: 6)
Acta Mathematica Vietnamica     Hybrid Journal  
Acta Mathematicae Applicatae Sinica, English Series     Hybrid Journal  
Advanced Science Letters     Full-text available via subscription   (Followers: 9)
Advances in Applied Clifford Algebras     Hybrid Journal   (Followers: 3)
Advances in Calculus of Variations     Hybrid Journal   (Followers: 2)
Advances in Catalysis     Full-text available via subscription   (Followers: 5)
Advances in Complex Systems     Hybrid Journal   (Followers: 6)
Advances in Computational Mathematics     Hybrid Journal   (Followers: 18)
Advances in Decision Sciences     Open Access   (Followers: 3)
Advances in Difference Equations     Open Access   (Followers: 3)
Advances in Fixed Point Theory     Open Access   (Followers: 5)
Advances in Geosciences (ADGEO)     Open Access   (Followers: 13)
Advances in Linear Algebra & Matrix Theory     Open Access   (Followers: 2)
Advances in Materials Sciences     Open Access   (Followers: 14)
Advances in Mathematical Physics     Open Access   (Followers: 3)
Advances in Mathematics     Full-text available via subscription   (Followers: 10)
Advances in Numerical Analysis     Open Access   (Followers: 4)
Advances in Operations Research     Open Access   (Followers: 12)
Advances in Porous Media     Full-text available via subscription   (Followers: 5)
Advances in Pure and Applied Mathematics     Hybrid Journal   (Followers: 6)
Advances in Pure Mathematics     Open Access   (Followers: 5)
Advances in Science and Research (ASR)     Open Access   (Followers: 4)
Aequationes Mathematicae     Hybrid Journal   (Followers: 2)
African Journal of Educational Studies in Mathematics and Sciences     Full-text available via subscription   (Followers: 5)
African Journal of Mathematics and Computer Science Research     Open Access   (Followers: 4)
Afrika Matematika     Hybrid Journal   (Followers: 1)
Air, Soil & Water Research     Open Access   (Followers: 11)
AKSIOMA Journal of Mathematics Education     Open Access   (Followers: 1)
Al-Jabar : Jurnal Pendidikan Matematika     Open Access  
Algebra and Logic     Hybrid Journal   (Followers: 5)
Algebra Colloquium     Hybrid Journal   (Followers: 4)
Algebra Universalis     Hybrid Journal   (Followers: 2)
Algorithmic Operations Research     Full-text available via subscription   (Followers: 5)
Algorithms     Open Access   (Followers: 11)
Algorithms Research     Open Access   (Followers: 1)
American Journal of Computational and Applied Mathematics     Open Access   (Followers: 5)
American Journal of Mathematical Analysis     Open Access  
American Journal of Mathematics     Full-text available via subscription   (Followers: 6)
American Journal of Operations Research     Open Access   (Followers: 5)
American Mathematical Monthly     Full-text available via subscription   (Followers: 6)
An International Journal of Optimization and Control: Theories & Applications     Open Access   (Followers: 8)
Analele Universitatii Ovidius Constanta - Seria Matematica     Open Access   (Followers: 1)
Analysis     Hybrid Journal   (Followers: 2)
Analysis and Applications     Hybrid Journal   (Followers: 1)
Analysis and Mathematical Physics     Hybrid Journal   (Followers: 4)
Analysis Mathematica     Full-text available via subscription  
Annales Mathematicae Silesianae     Open Access  
Annales mathématiques du Québec     Hybrid Journal   (Followers: 4)
Annales UMCS, Mathematica     Open Access   (Followers: 1)
Annales Universitatis Paedagogicae Cracoviensis. Studia Mathematica     Open Access  
Annali di Matematica Pura ed Applicata     Hybrid Journal   (Followers: 1)
Annals of Combinatorics     Hybrid Journal   (Followers: 3)
Annals of Data Science     Hybrid Journal   (Followers: 11)
Annals of Discrete Mathematics     Full-text available via subscription   (Followers: 6)
Annals of Mathematics     Full-text available via subscription  
Annals of Mathematics and Artificial Intelligence     Hybrid Journal   (Followers: 12)
Annals of Pure and Applied Logic     Open Access   (Followers: 2)
Annals of the Alexandru Ioan Cuza University - Mathematics     Open Access  
Annals of the Institute of Statistical Mathematics     Hybrid Journal   (Followers: 1)
Annals of West University of Timisoara - Mathematics     Open Access  
Annuaire du Collège de France     Open Access   (Followers: 5)
ANZIAM Journal     Open Access   (Followers: 1)
Applicable Algebra in Engineering, Communication and Computing     Hybrid Journal   (Followers: 2)
Applications of Mathematics     Hybrid Journal   (Followers: 1)
Applied Categorical Structures     Hybrid Journal   (Followers: 2)
Applied Computational Intelligence and Soft Computing     Open Access   (Followers: 11)
Applied Mathematics     Open Access   (Followers: 3)
Applied Mathematics     Open Access   (Followers: 6)
Applied Mathematics & Optimization     Hybrid Journal   (Followers: 6)
Applied Mathematics - A Journal of Chinese Universities     Hybrid Journal  
Applied Mathematics Letters     Full-text available via subscription   (Followers: 1)
Applied Mathematics Research eXpress     Hybrid Journal   (Followers: 1)
Applied Network Science     Open Access   (Followers: 3)
Applied Numerical Mathematics     Hybrid Journal   (Followers: 5)
Applied Spatial Analysis and Policy     Hybrid Journal   (Followers: 4)
Arab Journal of Mathematical Sciences     Open Access   (Followers: 3)
Arabian Journal of Mathematics     Open Access   (Followers: 2)
Archive for Mathematical Logic     Hybrid Journal   (Followers: 2)
Archive of Applied Mechanics     Hybrid Journal   (Followers: 5)
Archive of Numerical Software     Open Access  
Archives of Computational Methods in Engineering     Hybrid Journal   (Followers: 5)
Arkiv för Matematik     Hybrid Journal   (Followers: 1)
Armenian Journal of Mathematics     Open Access  
Arnold Mathematical Journal     Hybrid Journal   (Followers: 1)
Artificial Satellites : The Journal of Space Research Centre of Polish Academy of Sciences     Open Access   (Followers: 20)
Asia-Pacific Journal of Operational Research     Hybrid Journal   (Followers: 3)
Asian Journal of Algebra     Open Access   (Followers: 1)
Asian Journal of Current Engineering & Maths     Open Access  
Asian-European Journal of Mathematics     Hybrid Journal   (Followers: 2)
Australian Mathematics Teacher, The     Full-text available via subscription   (Followers: 6)
Australian Primary Mathematics Classroom     Full-text available via subscription   (Followers: 4)
Australian Senior Mathematics Journal     Full-text available via subscription   (Followers: 1)
Automatic Documentation and Mathematical Linguistics     Hybrid Journal   (Followers: 5)
Axioms     Open Access   (Followers: 1)
Baltic International Yearbook of Cognition, Logic and Communication     Open Access   (Followers: 1)
Basin Research     Hybrid Journal   (Followers: 5)
BIBECHANA     Open Access   (Followers: 2)
BIT Numerical Mathematics     Hybrid Journal  
BoEM - Boletim online de Educação Matemática     Open Access  
Boletim Cearense de Educação e História da Matemática     Open Access  
Boletim de Educação Matemática     Open Access  
Boletín de la Sociedad Matemática Mexicana     Hybrid Journal  
Bollettino dell'Unione Matematica Italiana     Full-text available via subscription   (Followers: 1)
British Journal of Mathematical and Statistical Psychology     Full-text available via subscription   (Followers: 21)
Bruno Pini Mathematical Analysis Seminar     Open Access  
Buletinul Academiei de Stiinte a Republicii Moldova. Matematica     Open Access   (Followers: 11)
Bulletin des Sciences Mathamatiques     Full-text available via subscription   (Followers: 4)
Bulletin of Dnipropetrovsk University. Series : Communications in Mathematical Modeling and Differential Equations Theory     Open Access   (Followers: 1)
Bulletin of Mathematical Sciences     Open Access   (Followers: 1)
Bulletin of Symbolic Logic     Full-text available via subscription   (Followers: 2)
Bulletin of the Australian Mathematical Society     Full-text available via subscription   (Followers: 1)
Bulletin of the Brazilian Mathematical Society, New Series     Hybrid Journal  
Bulletin of the London Mathematical Society     Hybrid Journal   (Followers: 4)
Bulletin of the Malaysian Mathematical Sciences Society     Hybrid Journal  
Calculus of Variations and Partial Differential Equations     Hybrid Journal  
Canadian Journal of Science, Mathematics and Technology Education     Hybrid Journal   (Followers: 18)
Carpathian Mathematical Publications     Open Access   (Followers: 1)
Catalysis in Industry     Hybrid Journal   (Followers: 1)
CEAS Space Journal     Hybrid Journal   (Followers: 2)
CHANCE     Hybrid Journal   (Followers: 5)
Chaos, Solitons & Fractals     Hybrid Journal   (Followers: 3)
ChemSusChem     Hybrid Journal   (Followers: 7)
Chinese Annals of Mathematics, Series B     Hybrid Journal  
Chinese Journal of Catalysis     Full-text available via subscription   (Followers: 2)
Chinese Journal of Mathematics     Open Access  
Clean Air Journal     Full-text available via subscription   (Followers: 1)
Cogent Mathematics     Open Access   (Followers: 2)
Cognitive Computation     Hybrid Journal   (Followers: 4)
Collectanea Mathematica     Hybrid Journal  
College Mathematics Journal     Full-text available via subscription   (Followers: 4)
COMBINATORICA     Hybrid Journal  
Combinatorics, Probability and Computing     Hybrid Journal   (Followers: 4)
Combustion Theory and Modelling     Hybrid Journal   (Followers: 14)
Commentarii Mathematici Helvetici     Hybrid Journal   (Followers: 1)
Communications in Combinatorics and Optimization     Open Access  
Communications in Contemporary Mathematics     Hybrid Journal  
Communications in Mathematical Physics     Hybrid Journal   (Followers: 2)
Communications On Pure & Applied Mathematics     Hybrid Journal   (Followers: 3)
Complex Analysis and its Synergies     Open Access   (Followers: 2)
Complex Variables and Elliptic Equations: An International Journal     Hybrid Journal  
Complexus     Full-text available via subscription  
Composite Materials Series     Full-text available via subscription   (Followers: 8)
Compositio Mathematica     Full-text available via subscription   (Followers: 1)
Comptes Rendus Mathematique     Full-text available via subscription   (Followers: 1)
Computational and Applied Mathematics     Hybrid Journal   (Followers: 2)
Computational and Mathematical Methods in Medicine     Open Access   (Followers: 2)
Computational and Mathematical Organization Theory     Hybrid Journal   (Followers: 2)
Computational Complexity     Hybrid Journal   (Followers: 4)
Computational Mathematics and Modeling     Hybrid Journal   (Followers: 8)
Computational Mechanics     Hybrid Journal   (Followers: 5)
Computational Methods and Function Theory     Hybrid Journal  
Computational Optimization and Applications     Hybrid Journal   (Followers: 7)
Computers & Mathematics with Applications     Full-text available via subscription   (Followers: 8)
Concrete Operators     Open Access   (Followers: 5)
Confluentes Mathematici     Hybrid Journal  
Contributions to Game Theory and Management     Open Access  
COSMOS     Hybrid Journal  
Cryptography and Communications     Hybrid Journal   (Followers: 12)
Cuadernos de Investigación y Formación en Educación Matemática     Open Access  
Cubo. A Mathematical Journal     Open Access  
Current Research in Biostatistics     Open Access   (Followers: 9)
Czechoslovak Mathematical Journal     Hybrid Journal   (Followers: 1)
Demographic Research     Open Access   (Followers: 10)
Demonstratio Mathematica     Open Access  
Dependence Modeling     Open Access  
Design Journal : An International Journal for All Aspects of Design     Hybrid Journal   (Followers: 29)
Developments in Clay Science     Full-text available via subscription   (Followers: 1)
Developments in Mineral Processing     Full-text available via subscription   (Followers: 3)
Dhaka University Journal of Science     Open Access  
Differential Equations and Dynamical Systems     Hybrid Journal   (Followers: 3)
Differentsial'nye Uravneniya     Open Access  
Discrete Mathematics     Hybrid Journal   (Followers: 8)
Discrete Mathematics & Theoretical Computer Science     Open Access  
Discrete Mathematics, Algorithms and Applications     Hybrid Journal   (Followers: 2)
Discussiones Mathematicae - General Algebra and Applications     Open Access  
Discussiones Mathematicae Graph Theory     Open Access   (Followers: 1)
Diskretnaya Matematika     Full-text available via subscription  
Dnipropetrovsk University Mathematics Bulletin     Open Access  
Doklady Akademii Nauk     Open Access  
Doklady Mathematics     Hybrid Journal  
Duke Mathematical Journal     Full-text available via subscription   (Followers: 1)
Eco Matemático     Open Access  
Edited Series on Advances in Nonlinear Science and Complexity     Full-text available via subscription  
Electronic Journal of Differential Equations     Open Access  
Electronic Journal of Graph Theory and Applications     Open Access   (Followers: 2)
Electronic Notes in Discrete Mathematics     Full-text available via subscription   (Followers: 2)
Elemente der Mathematik     Full-text available via subscription   (Followers: 4)

        1 2 3 4 | Last

Journal Cover Annali di Matematica Pura ed Applicata
  [SJR: 1.167]   [H-I: 26]   [1 followers]  Follow
   Hybrid Journal Hybrid journal (It can contain Open Access articles)
   ISSN (Print) 1618-1891 - ISSN (Online) 0373-3114
   Published by Springer-Verlag Homepage  [2351 journals]
  • Hypersurfaces of two space forms and conformally flat hypersurfaces
    • Authors: S. Canevari; R. Tojeiro
      Pages: 1 - 20
      Abstract: We address the problem of determining the hypersurfaces \(f:M^{n} \rightarrow \mathbb {Q}_s^{n+1}(c)\) with dimension \(n\ge 3\) of a pseudo-Riemannian space form of dimension \(n+1\) , constant curvature c and index \(s\in \{0, 1\}\) for which there exists another isometric immersion \(\tilde{f}:M^{n} \rightarrow \mathbb {Q}^{n+1}_{\tilde{s}}(\tilde{c})\) with \(\tilde{c}\ne c\) . For \(n\ge 4\) , we provide a complete solution by extending results for \(s=0=\tilde{s}\) by do Carmo and Dajczer (Proc Am Math Soc 86:115–119, 1982) and by Dajczer and Tojeiro (J Differ Geom 36:1–18, 1992). Our main results are for the most interesting case \(n=3\) , and these are new even in the Riemannian case \(s=0=\tilde{s}\) . In particular, we characterize the solutions that have dimension \(n=3\) and three distinct principal curvatures. We show that these are closely related to conformally flat hypersurfaces of \(\mathbb {Q}_s^{4}(c)\) with three distinct principal curvatures, and we obtain a similar characterization of the latter that improves a theorem by Hertrich-Jeromin (Beitr Algebra Geom 35:315–331, 1994).
      PubDate: 2018-02-01
      DOI: 10.1007/s10231-017-0665-0
      Issue No: Vol. 197, No. 1 (2018)
  • Enneper representation of minimal surfaces in the three-dimensional
           Lorentz–Minkowski space
    • Authors: Adriana A. Cintra; Irene I. Onnis
      Pages: 21 - 39
      Abstract: In this paper, we will give an Enneper-type representation for spacelike and timelike minimal surfaces in the Lorentz–Minkowski space \({\mathbb {L}}^{3}\) , using the complex and the paracomplex analysis (respectively). Then, we exhibit various examples of minimal surfaces in \({\mathbb {L}}^{3}\) constructed via the Enneper representation formula that it is equivalent to the Weierstrass representation obtained by Kobayashi (for spacelike immersions) and by Konderak (for the timelike ones).
      PubDate: 2018-02-01
      DOI: 10.1007/s10231-017-0666-z
      Issue No: Vol. 197, No. 1 (2018)
  • Removable sets for continuous solutions of quasilinear elliptic equations
           with nonlinear source or absorption terms
    • Authors: Kentaro Hirata; Takayori Ono
      Pages: 41 - 59
      Abstract: This paper establishes removable singularity theorems for nonnegative continuous solutions of quasilinear elliptic equations with nonlinear source or absorption terms when an exceptional set is conditioned in terms of the regularity of Hausdorff measure and a uniform Minkowski property. These weaker conditions enable us to consider some fractal sets as an exceptional set.
      PubDate: 2018-02-01
      DOI: 10.1007/s10231-017-0667-y
      Issue No: Vol. 197, No. 1 (2018)
  • On certain non-hypoelliptic vector fields with finite-codimensional range
           on the three-torus
    • Authors: Rafael B. Gonzalez
      Pages: 61 - 77
      Abstract: We study the finiteness of range’s codimension for a class of non-globally hypoelliptic vector fields on a torus of dimension three. The linear dependence of certain interactions of the coefficients is crucial. This condition is close to condition (P) of Nirenberg and Treves. Certain obstructions of number-theoretical nature involving Liouville numbers also appear in the results.
      PubDate: 2018-02-01
      DOI: 10.1007/s10231-017-0668-x
      Issue No: Vol. 197, No. 1 (2018)
  • Estimates of the Green function and the initial-Dirichlet problem for the
           heat equation in sub-Riemannian spaces
    • Authors: Nicola Garofalo; Isidro H. Munive
      Pages: 79 - 108
      Abstract: In a cylinder \(D_T = \Omega \times (0,T)\) , where \(\Omega \subset \mathbb {R}^{n}\) , we examine the relation between the L-caloric measure, \(\mathrm{d}\omega ^{(x,t)}\) , where L is the heat operator associated with a system of vector fields of Hörmander type, and the measure \(\mathrm{d}\sigma _X\times \mathrm{d}t\) , where \(\mathrm{d}\sigma _X\) is the intrinsic X-perimeter measure. The latter constitutes the appropriate replacement for the standard surface measure on the boundary and plays a central role in sub-Riemannian geometric measure theory. Under suitable assumptions on the domain \(\Omega \) we establish the mutual absolute continuity of \(\mathrm{d}\omega ^{(x,t)}\) and \(\mathrm{d}\sigma _X\times \mathrm{d}t\) . We also derive the solvability of the initial-Dirichlet problem for L with boundary data in appropriate \( L^p\) spaces, for every \(p>1\) .
      PubDate: 2018-02-01
      DOI: 10.1007/s10231-017-0669-9
      Issue No: Vol. 197, No. 1 (2018)
  • Lattice-based integration algorithms: Kronecker sequences and rank-1
    • Authors: Josef Dick; Friedrich Pillichshammer; Kosuke Suzuki; Mario Ullrich; Takehito Yoshiki
      Pages: 109 - 126
      Abstract: We prove upper bounds on the order of convergence of lattice-based algorithms for numerical integration in function spaces of dominating mixed smoothness on the unit cube with homogeneous boundary condition. More precisely, we study worst-case integration errors for Besov spaces of dominating mixed smoothness \(\mathring{\mathbf {B}}^s_{p,\theta }\) , which also comprise the concept of Sobolev spaces of dominating mixed smoothness \(\mathring{\mathbf {H}}^s_{p}\) as special cases. The considered algorithms are quasi-Monte Carlo rules with underlying nodes from \(T_N\left( \mathbb {Z}^d\right) \cap [0,1)^d\) , where \(T_N\) is a real invertible generator matrix of size d. For such rules, the worst-case error can be bounded in terms of the Zaremba index of the lattice \(\mathbb {X}_N=T_N\left( \mathbb {Z}^d\right) \) . We apply this result to Kronecker lattices and to rank-1 lattice point sets, which both lead to optimal error bounds up to \(\log N\) -factors for arbitrary smoothness s. The advantage of Kronecker lattices and classical lattice point sets is that the run-time of algorithms generating these point sets is very short.
      PubDate: 2018-02-01
      DOI: 10.1007/s10231-017-0670-3
      Issue No: Vol. 197, No. 1 (2018)
  • On nearly Sasakian and nearly cosymplectic manifolds
    • Authors: Antonio De Nicola; Giulia Dileo; Ivan Yudin
      Pages: 127 - 138
      Abstract: We prove that every nearly Sasakian manifold of dimension greater than five is Sasakian. This provides a new criterion for an almost contact metric manifold to be Sasakian. Moreover, we classify nearly cosymplectic manifolds of dimension greater than five.
      PubDate: 2018-02-01
      DOI: 10.1007/s10231-017-0671-2
      Issue No: Vol. 197, No. 1 (2018)
  • Complex symplectic structures and the $$\partial {\bar{\partial }}$$ ∂
           ∂ ¯ -lemma
    • Authors: Andrea Cattaneo; Adriano Tomassini
      Pages: 139 - 151
      Abstract: In this paper, we study complex symplectic manifolds, i.e., compact complex manifolds X which admit a holomorphic (2, 0)-form \(\sigma \) which is d-closed and non-degenerate, and in particular the Beauville–Bogomolov–Fujiki quadric \(Q_\sigma \) associated with them. We will show that if X satisfies the \(\partial {\bar{\partial }}\) -lemma, then \(Q_\sigma \) is smooth if and only if \(h^{2, 0}(X) = 1\) and is irreducible if and only if \(h^{1, 1}(X) > 0\) .
      PubDate: 2018-02-01
      DOI: 10.1007/s10231-017-0672-1
      Issue No: Vol. 197, No. 1 (2018)
  • Homogenization of an evolution problem with $$ L\log L$$ L log L data in a
           domain with oscillating boundary
    • Authors: Antonio Gaudiello; Olivier Guibé
      Pages: 153 - 169
      Abstract: We consider a N-dimensional structure, \(N\in \mathbb {N}\setminus \{1\}\) , with a very rough boundary. Precisely, in 3D the structure consists in a box with the upper side covered with \(\varepsilon \) -periodically distributed asperities having fixed height and size depending on \(\varepsilon \) . In this structure, we study the asymptotic behavior, as \(\varepsilon \) vanishes, of an evolution Neumann problem with source term and initial data having \(L\log L\) a priori estimates. We identify the limit problem.
      PubDate: 2018-02-01
      DOI: 10.1007/s10231-017-0673-0
      Issue No: Vol. 197, No. 1 (2018)
  • Relations among Gauge and Pettis integrals for cwk ( X )-valued
    • Authors: D. Candeloro; L. Di Piazza; K. Musiał; A. R. Sambucini
      Pages: 171 - 183
      Abstract: The aim of this paper is to study relationships among “gauge integrals” (Henstock, McShane, Birkhoff) and Pettis integral of multifunctions whose values are weakly compact and convex subsets of a general Banach space, not necessarily separable. For this purpose, we prove the existence of variationally Henstock integrable selections for variationally Henstock integrable multifunctions. Using this and other known results concerning the existence of selections integrable in the same sense as the corresponding multifunctions, we obtain three decomposition theorems (Theorems 3.2, 4.2, 5.3). As applications of such decompositions, we deduce characterizations of Henstock (Theorem 3.3) and \(\mathcal H\) (Theorem 4.3) integrable multifunctions, together with an extension of a well-known theorem of Fremlin [22, Theorem 8].
      PubDate: 2018-02-01
      DOI: 10.1007/s10231-017-0674-z
      Issue No: Vol. 197, No. 1 (2018)
  • Harmonicity of the Atiyah–Hitchin–Singer and Eells–Salamon almost
           complex structures
    • Authors: Johann Davidov; Oleg Mushkarov
      Pages: 185 - 209
      Abstract: In this paper, we describe the oriented Riemannian four-manifolds M for which the Atiyah–Hitchin–Singer or Eells–Salamon almost complex structure on the twistor space \({\mathcal {Z}}\) of M determines a harmonic map from \({\mathcal {Z}}\) into its twistor space.
      PubDate: 2018-02-01
      DOI: 10.1007/s10231-017-0675-y
      Issue No: Vol. 197, No. 1 (2018)
  • Inequalities for eigenvalues of the buckling problem of arbitrary order
    • Authors: Qing-Ming Cheng; Xuerong Qi; Qiaoling Wang; Changyu Xia
      Pages: 211 - 232
      Abstract: This paper studies eigenvalues of the buckling problem of arbitrary order on bounded domains in Euclidean spaces and spheres. We prove universal bounds for the kth eigenvalue in terms of the lower ones independent of the domains. Our results strengthen the recent work in Jost et al. (Commun Partial Differ Equ 35:1563–1589, 2010) and generalize Cheng–Yang’s recent estimates (Cheng and Yang in Trans Am Math Soc 364:6139–6158, 2012) on the buckling eigenvalues of order two to arbitrary order.
      PubDate: 2018-02-01
      DOI: 10.1007/s10231-017-0676-x
      Issue No: Vol. 197, No. 1 (2018)
  • On derivations of subalgebras of real semisimple Lie algebras
    • Authors: Paolo Ciatti; Michael G. Cowling
      Pages: 233 - 259
      Abstract: Let \(\mathfrak {g}\) be a real semisimple Lie algebra with Iwasawa decomposition \(\mathfrak {k} \oplus \mathfrak {a} \oplus \mathfrak {n}\) . We show that, except for some explicit exceptional cases, every derivation of the nilpotent subalgebra \(\mathfrak {n}\) that preserves its restricted root space decomposition is of the form \({\text {ad}}( W)\) , where \(W \in \mathfrak {m}\oplus \mathfrak {a}\) .
      PubDate: 2018-02-01
      DOI: 10.1007/s10231-017-0677-9
      Issue No: Vol. 197, No. 1 (2018)
  • Explicit estimates on the measure of primary KAM tori
    • Authors: L. Biasco; L. Chierchia
      Pages: 261 - 281
      Abstract: From KAM theory it follows that the measure of phase points which do not lie on Diophantine, Lagrangian, “primary” tori in a nearly integrable, real-analytic Hamiltonian system is \(O(\sqrt{\varepsilon })\) , if \(\varepsilon \) is the size of the perturbation. In this paper we discuss how the constant in front of \(\sqrt{\varepsilon }\) depends on the unperturbed system and in particular on the phase-space domain.
      PubDate: 2018-02-01
      DOI: 10.1007/s10231-017-0678-8
      Issue No: Vol. 197, No. 1 (2018)
  • On square integrable solutions and principal and antiprincipal solutions
           for linear Hamiltonian systems
    • Authors: Roman Šimon Hilscher; Petr Zemánek
      Pages: 283 - 306
      Abstract: New results in the Weyl–Titchmarsh theory for linear Hamiltonian differential systems are derived by using principal and antiprincipal solutions at infinity. In particular, a non-limit circle case criterion is established and a close connection between the Weyl solution and the minimal principal solution at infinity is shown in the limit point case. In addition, the square integrability of the columns of the minimal principal solution at infinity is investigated. All results are obtained without any controllability assumption. Several illustrative examples are also provided.
      PubDate: 2018-02-01
      DOI: 10.1007/s10231-017-0679-7
      Issue No: Vol. 197, No. 1 (2018)
  • On groups with automorphisms whose fixed points are Engel
    • Authors: Cristina Acciarri; Pavel Shumyatsky; Danilo Sanção da Silveira
      Pages: 307 - 316
      Abstract: We study finite and profinite groups admitting an action by an elementary abelian group under which the centralizers of automorphisms consist of Engel elements. In particular, we prove the following theorems. Let q be a prime and A an elementary abelian q-group of order \(q^2\) acting coprimely on a profinite group G. Assume that all elements in \(C_{G}(a)\) are Engel in G for each \(a\in A^{\#}\) . Then, G is locally nilpotent. Let q be a prime, n a positive integer and A an elementary abelian group of order \(q^3\) acting coprimely on a finite group G. Assume that for each \(a\in A^{\#}\) every element of \(C_{G}(a)\) is n-Engel in \(C_{G}(a)\) . Then, the group G is k-Engel for some \(\{n,q\}\) -bounded number k.
      PubDate: 2018-02-01
      DOI: 10.1007/s10231-017-0680-1
      Issue No: Vol. 197, No. 1 (2018)
  • Permutability in uncountable groups
    • Authors: M. De Falco; M. J. Evans; F. de Giovanni; C. Musella
      Abstract: A subgroup X of a group G is called permutable if \(XY=YX\) for all subgroups Y of G. It is well known that permutable subgroups play an important role in many problems in group theory, and the purpose of this paper is to describe the structure of uncountable groups of regular cardinality  \(\aleph \) in which all large subgroups are permutable.
      PubDate: 2018-02-21
      DOI: 10.1007/s10231-018-0730-3
  • Parabolic BMO and the forward-in-time maximal operator
    • Authors: Olli Saari
      Abstract: We study if the parabolic forward-in-time maximal operator is bounded on parabolic \({{\mathrm{BMO}}}\) . It turns out that for non-negative functions the answer is positive, but the behavior of sign-changing functions is more delicate. The class parabolic \({{\mathrm{BMO}}}\) and the forward-in-time maximal operator originate from the regularity theory of nonlinear parabolic partial differential equations. In addition to that context, we also study the question in dimension one.
      PubDate: 2018-02-20
      DOI: 10.1007/s10231-018-0733-0
  • Infinitely many sign-changing solutions for a nonlocal problem
    • Authors: Guangze Gu; Wei Zhang; Fukun Zhao
      Abstract: In this paper, we consider the following general nonlocal problem $$\begin{aligned} \left\{ \begin{array}{l@{\quad }l} -\mathcal {L}_K u=f(x,u)&{}\text {in} \,\,\varOmega ,\\ u=0&{}\text {in}\,\,\mathbb {R}^N\backslash \varOmega , \end{array} \right. \end{aligned}$$ where \(\varOmega \subset \mathbb {R}^N\) is a bounded domain with Lipschitz boundary \(\partial \varOmega \) , \(s\in (0,1)\) with \(2s<N\) and \(\mathcal {L}_K\) is a nonlocal integrodifferential operator of fractional Laplacian type. We obtain the existence of infinitely many sign-changing solutions by combining critical point theory and invariant sets of descending flow.
      PubDate: 2018-02-17
      DOI: 10.1007/s10231-018-0731-2
  • Kinematic formulae for tensorial curvature measures
    • Authors: Daniel Hug; Jan A. Weis
      Abstract: The tensorial curvature measures are tensor-valued generalizations of the curvature measures of convex bodies. On convex polytopes, there exist further generalizations some of which also have continuous extensions to arbitrary convex bodies. We prove a complete set of kinematic formulae for such (generalized) tensorial curvature measures. These formulae express the integral mean of the (generalized) tensorial curvature measure of the intersection of two given convex bodies (resp. polytopes), one of which is uniformly moved by a proper rigid motion, in terms of linear combinations of (generalized) tensorial curvature measures of the given convex bodies (resp. polytopes). We prove these results in a more direct way than in the classical proof of the principal kinematic formula for curvature measures, which uses the connection to Crofton formulae to determine the involved constants explicitly.
      PubDate: 2018-01-30
      DOI: 10.1007/s10231-018-0728-x
School of Mathematical and Computer Sciences
Heriot-Watt University
Edinburgh, EH14 4AS, UK
Tel: +00 44 (0)131 4513762
Fax: +00 44 (0)131 4513327
Home (Search)
Subjects A-Z
Publishers A-Z
Your IP address:
About JournalTOCs
News (blog, publications)
JournalTOCs on Twitter   JournalTOCs on Facebook

JournalTOCs © 2009-