Subjects -> MATHEMATICS (Total: 1119 journals)     - APPLIED MATHEMATICS (92 journals)    - GEOMETRY AND TOPOLOGY (23 journals)    - MATHEMATICS (822 journals)    - MATHEMATICS (GENERAL) (45 journals)    - NUMERICAL ANALYSIS (25 journals)    - PROBABILITIES AND MATH STATISTICS (112 journals) MATHEMATICS (822 journals)            First | 1 2 3 4 5
 Showing 401 - 538 of 538 Journals sorted alphabetically Journal of Computer Engineering, System and Science (CESS) Journal of Contemporary Mathematical Analysis Journal of Cryptology       (Followers: 5) Journal of Difference Equations and Applications Journal of Differential Equations       (Followers: 1) Journal of Discrete Algorithms       (Followers: 4) Journal of Discrete Mathematics       (Followers: 1) Journal of Dynamics and Differential Equations Journal of Engineering Mathematics       (Followers: 2) Journal of Evolution Equations Journal of Experimental Algorithmics       (Followers: 1) Journal of Flood Risk Management       (Followers: 14) Journal of Formalized Reasoning       (Followers: 2) Journal of Function Spaces Journal of Functional Analysis       (Followers: 2) Journal of Geochemical Exploration       (Followers: 1) Journal of Geological Research       (Followers: 1) Journal of Geovisualization and Spatial Analysis Journal of Global Optimization       (Followers: 7) Journal of Global Research in Mathematical Archives       (Followers: 1) Journal of Group Theory       (Followers: 2) Journal of Homotopy and Related Structures Journal of Honai Math Journal of Humanistic Mathematics       (Followers: 1) Journal of Hyperbolic Differential Equations Journal of Indian Council of Philosophical Research Journal of Industrial Mathematics       (Followers: 2) Journal of Inequalities and Applications Journal of Infrared, Millimeter and Terahertz Waves       (Followers: 3) Journal of Integrable Systems       (Followers: 1) Journal of K-Theory Journal of Knot Theory and Its Ramifications       (Followers: 1) Journal of Kufa for Mathematics and Computer       (Followers: 1) Journal of Liquid Chromatography & Related Technologies       (Followers: 7) Journal of Logical and Algebraic Methods in Programming Journal of Manufacturing Systems       (Followers: 4) Journal of Mathematical Analysis and Applications       (Followers: 5) Journal of mathematical and 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of Urban Regeneration & Renewal       (Followers: 11) JRAMathEdu : Journal of Research and Advances in Mathematics Education       (Followers: 6) JUMLAHKU : Jurnal Matematika Ilmiah STKIP Muhammadiyah Kuningan       (Followers: 2) JURING (Journal for Research in Mathematics Learning)       (Followers: 1) Jurnal Ilmiah AdMathEdu Jurnal Matematika       (Followers: 1) Jurnal Matematika Integratif Jurnal Matematika, Sains, Dan Teknologi Jurnal Natural Jurnal Pendidikan Matematika Raflesia Jurnal Penelitian Pembelajaran Matematika Sekolah Jurnal Penelitian Sains (JPS) Jurnal Riset Pendidikan Matematika Jurnal Sains Matematika dan Statistika Jurnal Tadris Matematika Jurnal Teknologi dan Sistem Komputer Kontinu : Jurnal Penelitian Didaktik Matematika       (Followers: 3) Kreano, Jurnal Matematika Kreatif-Inovatif       (Followers: 6) Le Matematiche Learning and Teaching Mathematics       (Followers: 7) Lettera Matematica Lietuvos Matematikos Rinkinys       (Followers: 3) Limits : Journal of 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(Followers: 20) Mathematics in Science and Engineering Mathematics of Control, Signals, and Systems (MCSS)       (Followers: 5) Mathematics of Quantum and Nano Technologies Mathématiques et sciences humaines       (Followers: 6) Mathematische Annalen       (Followers: 1) Mathematische Nachrichten       (Followers: 1) Mathematische Semesterberichte Mathematische Zeitschrift       (Followers: 1) MathLAB Journal       (Followers: 5) MATICS       (Followers: 2) Matrix Science Mathematic       (Followers: 1) Measurement Science Review       (Followers: 3) Mediterranean Journal of Mathematics Memetic Computing Mendel : Soft Computing Journal Metaheuristics Metals and Materials International Metascience       (Followers: 1) Metrology and Instruments / Метрологія та прилади Milan Journal of Mathematics Mitteilungen der DMV MLQ- Mathematical Logic Quarterly       (Followers: 1) MONA : Matematik- og Naturfagsdidaktik       (Followers: 5) Monatshefte fur Mathematik Moroccan Journal of Pure and Applied Analysis       (Followers: 4) Moscow University Mathematics Bulletin MSOR Connections       (Followers: 1) Multiscale Modeling and Simulation       (Followers: 3) MUST : Journal of Mathematics Education, Science and Technology       (Followers: 2) Nagoya Mathematical Journal Nano Research       (Followers: 4) Nanotechnologies in Russia       (Followers: 1) Natural Resource Modeling       (Followers: 1) New Mathematics and Natural Computation Nonlinear Analysis : Modelling and Control       (Followers: 1) Nonlinear Analysis : Theory, Methods & Applications       (Followers: 1) Nonlinear Analysis: Hybrid Systems Nonlinear Analysis: Real World Applications       (Followers: 2) Nonlinear Differential Equations and Applications NoDEA Nonlinear Engineering Nonlinear Oscillations       (Followers: 1) North Carolina Journal of Mathematics and Statistics North-Holland Mathematical Library       (Followers: 1) North-Holland Mathematics Studies
Similar Journals
 Mathematical Proceedings of the Cambridge Philosophical SocietyJournal Prestige (SJR): 1.086 Citation Impact (citeScore): 1Number of Followers: 2      Subscription journal ISSN (Print) 0305-0041 - ISSN (Online) 1469-8064 Published by Cambridge University Press  [396 journals]
• PSP volume 170 issue 3 Cover and Front matter
• PubDate: 2021-05-01T00:00:00.000Z
DOI: 10.1017/S0305004121000347
Issue No: Vol. 170, No. 3 (2021)

• PSP volume 170 issue 3 Cover and Back matter
• PubDate: 2021-05-01T00:00:00.000Z
DOI: 10.1017/S0305004121000359
Issue No: Vol. 170, No. 3 (2021)

• A combination theorem for combinatorially non-positively curved complexes
of hyperbolic groups
• Authors: ALEXANDRE MARTIN; DAMIAN OSAJDA
Pages: 445 - 477
Abstract: We prove a combination theorem for hyperbolic groups, in the case of groups acting on complexes displaying combinatorial features reminiscent of non-positive curvature. Such complexes include for instance weakly systolic complexes and C'(1/6) small cancellation polygonal complexes. Our proof involves constructing a potential Gromov boundary for the resulting groups and analyzing the dynamics of the action on the boundary in order to use Bowditch’s characterisation of hyperbolicity. A key ingredient is the introduction of a combinatorial property that implies a weak form of non-positive curvature, and which holds for large classes of complexes.As an application, we study the hyperbolicity of groups obtained by small cancellation over a graph of hyperbolic groups.
PubDate: 2021-05-01T00:00:00.000Z
DOI: 10.1017/S0305004119000446
Issue No: Vol. 170, No. 3 (2021)

• Maximal hyperbolic towers and weight in the theory of free groups
• Authors: BENJAMIN BRÜCK
Pages: 479 - 498
Abstract: We show that in general for a given group the structure of a maximal hyperbolic tower over a free group is not canonical: we construct examples of groups having hyperbolic tower structures over free subgroups which have arbitrarily large ratios between their ranks. These groups have the same first order theory as non-abelian free groups and we use them to study the weight of types in this theory.
PubDate: 2021-05-01T00:00:00.000Z
DOI: 10.1017/S0305004119000483
Issue No: Vol. 170, No. 3 (2021)

• Variation of the algebraic λ-invariant over a solvable extension
• Authors: DANIEL DELBOURGO
Pages: 499 - 521
Abstract: Fix an odd prime p. Let $\mathcal{D}_n$ denote a non-abelian extension of a number field K such that $K\cap\mathbb{Q}(\mu_{p^{\infty}})=\mathbb{Q},$ and whose Galois group has the form $\text{Gal}\big(\mathcal{D}_n/K\big)\cong \big(\mathbb{Z}/p^{n'}\mathbb{Z}\big)^{\oplus g}\rtimes \big(\mathbb{Z}/p^n\mathbb{Z}\big)^{\times}\$ where g > 0 and $0 \lt n'\leq n$. Given a modular Galois representation $\overline{\rho}:G_{\mathbb{Q}}\rightarrow \text{GL}_2(\mathbb{F})$ which is p-ordinary and also p-distinguished, we shall write $\mathcal{H}(\overline{\rho})$ for the associated Hida family. Using Greenberg’s notion of Selmer atoms, we prove an exact formula for the algebraic λ-invariant$$\lambda^{\text{alg}}_{\mathcal{D}_n}(f) \;=\; \text{the number of zeroes of }\text{char}_{\Lambda}\big(\text{Sel}_{\mathcal{D}_n^{\text{cy}}}\big(f\big)^{\wedge}\big)$$at all $f\in\mathcal{H}(\overline{\rho})$, under the assumption $\mu^{\text{alg}}_{K(\mu_p)}(f_0)=0$ for at least one form f0. We can then easily deduce that $\lambda^{\text{alg}}_{\mathcal{D}_n}(f)$ is constant along branches of
PubDate: 2021-05-01T00:00:00.000Z
DOI: 10.1017/S0305004119000495
Issue No: Vol. 170, No. 3 (2021)

• Cube complexes and abelian subgroups of automorphism groups of RAAGs
• Authors: BENJAMIN MILLARD; KAREN VOGTMANN
Pages: 523 - 547
Abstract: We construct free abelian subgroups of the group U(AΓ) of untwisted outer automorphisms of a right-angled Artin group, thus giving lower bounds on the virtual cohomological dimension. The group U(AΓ) was studied in [5] by constructing a contractible cube complex on which it acts properly and cocompactly, giving an upper bound for the virtual cohomological dimension. The ranks of our free abelian subgroups are equal to the dimensions of principal cubes in this complex. These are often of maximal dimension, so that the upper and lower bounds agree. In many cases when the principal cubes are not of maximal dimension we show there is an invariant contractible subcomplex of strictly lower dimension.
PubDate: 2021-05-01T00:00:00.000Z
DOI: 10.1017/S0305004119000501
Issue No: Vol. 170, No. 3 (2021)

• Separation dimension and degree
• Authors: ALEX SCOTT; DAVID R. WOOD
Pages: 549 - 558
Abstract: The separation dimension of a graph G is the minimum positive integer d for which there is an embedding of G into ℝd, such that every pair of disjoint edges are separated by some axis-parallel hyperplane. We prove a conjecture of Alon et al. [SIAM J. Discrete Math. 2015] by showing that every graph with maximum degree Δ has separation dimension less than 20Δ, which is best possible up to a constant factor. We also prove that graphs with separation dimension 3 have bounded average degree and bounded chromatic number, partially resolving an open problem by Alon et al. [J. Graph Theory 2018].
PubDate: 2021-05-01T00:00:00.000Z
DOI: 10.1017/S0305004119000525
Issue No: Vol. 170, No. 3 (2021)

• On commensurability of right-angled Artin groups II: RAAGs defined by
paths
• Authors: MONTSERRAT CASALS–RUIZ; ILYA KAZACHKOV, ALEXANDER ZAKHAROV
Pages: 559 - 608
Abstract: In this paper we continue the study of right-angled Artin groups up to commensurability initiated in [CKZ]. We show that RAAGs defined by different paths of length greater than 3 are not commensurable. We also characterise which RAAGs defined by paths are commensurable to RAAGs defined by trees of diameter 4. More precisely, we show that a RAAG defined by a path of length n > 4 is commensurable to a RAAG defined by a tree of diameter 4 if and only if n ≡ 2 (mod 4). These results follow from the connection that we establish between the classification of RAAGs up to commensurability and linear integer-programming.
PubDate: 2021-05-01T00:00:00.000Z
DOI: 10.1017/S0305004119000537
Issue No: Vol. 170, No. 3 (2021)

• Moufang loops with nonnormal commutative centre
• Authors: ALEXANDER N. GRISHKOV; ANDREI V. ZAVARNITSINE
Pages: 609 - 614
Abstract: We construct two infinite series of Moufang loops of exponent 3 whose commutative centre (i. e. the set of elements that commute with all elements of the loop) is not a normal subloop. In particular, we obtain examples of such loops of orders 38 and 311 one of which can be defined as the Moufang triplication of the free Burnside group B(3, 3).
PubDate: 2021-05-01T00:00:00.000Z
DOI: 10.1017/S0305004119000549
Issue No: Vol. 170, No. 3 (2021)

• Revisiting Leighton’s theorem with the Haar measure
• Authors: DANIEL J. WOODHOUSE
Pages: 615 - 623
Abstract: Leighton’s graph covering theorem states that a pair of finite graphs with isomorphic universal covers have a common finite cover. We provide a new proof of Leighton’s theorem that allows generalisations; we prove the corresponding result for graphs with fins. As a corollary we obtain pattern rigidity for free groups with line patterns, building on the work of Cashen–Macura and Hagen–Touikan. To illustrate the potential for future applications, we give a quasi-isometric rigidity result for a family of cyclic doubles of free groups.
PubDate: 2021-05-01T00:00:00.000Z
DOI: 10.1017/S0305004119000550
Issue No: Vol. 170, No. 3 (2021)

• Two closed orbits for non-degenerate Reeb flows
• Authors: MIGUEL ABREU; JEAN GUTT, JUNGSOO KANG, LEONARDO MACARINI
Pages: 625 - 660
Abstract: We prove that every non-degenerate Reeb flow on a closed contact manifold M admitting a strong symplectic filling W with vanishing first Chern class carries at least two geometrically distinct closed orbits provided that the positive equivariant symplectic homology of W satisfies a mild condition. Under further assumptions, we establish the existence of two geometrically distinct closed orbits on any contact finite quotient of M. Several examples of such contact manifolds are provided, like displaceable ones, unit cosphere bundles, prequantisation circle bundles, Brieskorn spheres and toric contact manifolds. We also show that this condition on the equivariant symplectic homology is preserved by boundary connected sums of Liouville domains. As a byproduct of one of our applications, we prove a sort of Lusternik–Fet theorem for Reeb flows on the unit cosphere bundle of not rationally aspherical manifolds satisfying suitable additional assumptions.
PubDate: 2021-05-01T00:00:00.000Z
DOI: 10.1017/S0305004120000018
Issue No: Vol. 170, No. 3 (2021)

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