Subjects -> MATHEMATICS (Total: 1013 journals)     - APPLIED MATHEMATICS (92 journals)    - GEOMETRY AND TOPOLOGY (23 journals)    - MATHEMATICS (714 journals)    - MATHEMATICS (GENERAL) (45 journals)    - NUMERICAL ANALYSIS (26 journals)    - PROBABILITIES AND MATH STATISTICS (113 journals) MATHEMATICS (714 journals)            First | 1 2 3 4
 Showing 601 - 538 of 538 Journals sorted alphabetically Research in the Mathematical Sciences Research Journal of Pure Algebra       (Followers: 1) Researches in Mathematics Results in Control and Optimization Results in Mathematics Results in Nonlinear Analysis Review of Symbolic Logic       (Followers: 2) Reviews in Mathematical Physics       (Followers: 1) Revista Baiana de Educação Matemática Revista Bases de la Ciencia Revista BoEM - Boletim online de Educação Matemática Revista Colombiana de Matemáticas       (Followers: 1) Revista de Ciencias Revista de Educación Matemática Revista de la Escuela de Perfeccionamiento en Investigación Operativa Revista de la Real Academia de Ciencias Exactas, Fisicas y Naturales. Serie A. Matematicas Revista de Matemática : Teoría y Aplicaciones       (Followers: 1) Revista Digital: Matemática, Educación e Internet Revista Electrónica de Conocimientos, Saberes y Prácticas Revista Integración : Temas de Matemáticas Revista Internacional de Sistemas Revista Latinoamericana de Etnomatemática Revista Latinoamericana de Investigación en Matemática Educativa Revista Matemática Complutense Revista REAMEC : Rede Amazônica de Educação em Ciências e Matemática Revista SIGMA Ricerche di Matematica RMS : Research in Mathematics & Statistics Royal Society Open Science       (Followers: 7) Russian Journal of Mathematical Physics Russian Mathematics Sahand Communications in Mathematical Analysis Sampling Theory, Signal Processing, and Data Analysis São Paulo Journal of Mathematical Sciences Science China Mathematics       (Followers: 1) Science Progress       (Followers: 1) Sciences & Technologie A : sciences exactes Selecta Mathematica       (Followers: 1) SeMA Journal Semigroup Forum       (Followers: 1) Set-Valued and Variational Analysis SIAM Journal on Applied Mathematics       (Followers: 11) SIAM Journal on Computing       (Followers: 11) SIAM Journal on Control and Optimization       (Followers: 18) SIAM Journal on Discrete Mathematics       (Followers: 8) SIAM Journal on Financial Mathematics       (Followers: 3) SIAM Journal on Mathematics of Data Science       (Followers: 1) SIAM Journal on Matrix Analysis and Applications       (Followers: 3) SIAM Journal on Optimization       (Followers: 12) Siberian Advances in Mathematics Siberian Mathematical Journal Sigmae SILICON SN Partial Differential Equations and Applications Soft Computing       (Followers: 7) Statistics and Computing       (Followers: 14) Stochastic Analysis and Applications       (Followers: 3) Stochastic Partial Differential Equations : Analysis and Computations       (Followers: 2) Stochastic Processes and their Applications       (Followers: 6) Stochastics and Dynamics       (Followers: 2) Studia Scientiarum Mathematicarum Hungarica       (Followers: 1) Studia Universitatis Babeș-Bolyai Informatica Studies In Applied Mathematics       (Followers: 1) Studies in Mathematical Sciences       (Followers: 1) Superficies y vacio Suska Journal of Mathematics Education       (Followers: 1) Swiss Journal of Geosciences       (Followers: 1) Synthesis Lectures on Algorithms and Software in Engineering       (Followers: 2) Synthesis Lectures on Mathematics and Statistics       (Followers: 1) Tamkang Journal of Mathematics Tatra Mountains Mathematical Publications Teaching Mathematics       (Followers: 10) Teaching Mathematics and its Applications: An International Journal of the IMA       (Followers: 4) Teaching Statistics       (Followers: 8) Technometrics       (Followers: 8) The Journal of Supercomputing       (Followers: 1) The Mathematica journal The Mathematical Gazette       (Followers: 1) The Mathematical Intelligencer The Ramanujan Journal The VLDB Journal       (Followers: 2) Theoretical and Mathematical Physics       (Followers: 7) Theory and Applications of Graphs Topological Methods in Nonlinear Analysis Transactions of the London Mathematical Society       (Followers: 1) Transformation Groups Turkish Journal of Mathematics Ukrainian Mathematical Journal Uniciencia Uniform Distribution Theory Unisda Journal of Mathematics and Computer Science Unnes Journal of Mathematics       (Followers: 1) Unnes Journal of Mathematics Education       (Followers: 2) Unnes Journal of Mathematics Education Research       (Followers: 1) Ural Mathematical Journal Vestnik Samarskogo Gosudarstvennogo Tekhnicheskogo Universiteta. Seriya Fiziko-Matematicheskie Nauki Vestnik St. Petersburg University: Mathematics VFAST Transactions on Mathematics       (Followers: 1) Vietnam Journal of Mathematics Vinculum Visnyk of V. N. Karazin Kharkiv National University. Ser. Mathematics, Applied Mathematics and Mechanics       (Followers: 2) Water SA       (Followers: 1) Water Waves Zamm-Zeitschrift Fuer Angewandte Mathematik Und Mechanik       (Followers: 1) ZDM       (Followers: 2) Zeitschrift für angewandte Mathematik und Physik       (Followers: 2) Zeitschrift fur Energiewirtschaft Zetetike

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Similar Journals
 Siberian Mathematical JournalJournal Prestige (SJR): 0.675 Citation Impact (citeScore): 1Number of Followers: 0      Hybrid journal (It can contain Open Access articles) ISSN (Print) 1573-9260 - ISSN (Online) 0037-4466 Published by Springer-Verlag  [2469 journals]
• On Intersections of  $\pi$ -Hall Subgroups in Finite $D_{\pi}$ -Groups

Abstract: Abstract We give an example of a series of finite $$D_{\pi}$$ -groups where for each group $$G$$ in the series and its $$\pi$$ -Hall subgroup $$H$$ , the inequality $$H\cap H^{x}\cap H^{y}\neq 1$$ holds for all $$x,y\in G$$ . Thus a negative answer is obtained both to Problem 7.3 by Vdovin and Revin and its analog—Question 18.31 in The Kourovka Notebook. We also describe the subgroups $$\operatorname{Min}_{G}(H,H,H)$$ and $$\min_{G}(H,H,H)$$ .
PubDate: 2022-07-01

• Functional-Differential Equations with Dilation and Symmetry

Abstract: Abstract We examine the Dirichlet problem in a bounded plane domain for a strongly elliptic functional-differential equation of the second order containing the argument transformations $$x\mapsto px$$ ( $$p>0$$ ) and $$x\mapsto-x$$ in higher-order derivatives. The study of solvability of the problem relies on a Gårding-type inequality for which some necessary and sufficient conditions are obtained in algebraic form.
PubDate: 2022-07-01

• On the Existence of $G$ -Permutable Subgroups in Simple Sporadic Groups

Abstract: Abstract A subgroup $$A$$ of a group $$G$$ is $$G$$ -permutable in  $$G$$ if for every subgroup $$B\leq G$$ there is $$x\in G$$ satisfying $$AB^{x}=B^{x}A$$ . A subgroup $$A$$ is hereditarily $$G$$ -permutable in  $$G$$ if  $$A$$ is $$E$$ -permutable in every subgroup  $$E$$ of  $$G$$ which includes  $$A$$ . The Kourovka Notebook contains Problem 17.112: Which finite nonabelian simple groups $$G$$ possess a proper (hereditarily) $$G$$ -permutable subgroup' We answer the question for simple sporadic groups.
PubDate: 2022-07-01

• Multiagent Temporal Logics, Unification Problems, and Admissibilities

Abstract: Abstract Under study is the temporal multiagent logic with different intervals of lost time which are individual for each of the agents. The logic bases on the frames with principal basic sets on all naturals  $$N$$ as temporal states, where each agent  $$j$$ can have their own proper sets  $$X_{j}$$ of inaccessible (lost, forgotten) temporal states ( $$X_{j}\subset N$$ for all $$j\in J$$ ). The unification problem and the problem of the algorithmic recognition of admissible inference rules are the main mathematical problems of the paper. The solution of the unification problem consists in finding a finite computable set of formulas which is a complete set of unifiers. The problem is solved by the Ghilardi technique of projective formulas. We prove that every formula unifiable in this logic is projective and provide some algorithm constructing its projective unifier, which solves the unification problem. This makes it possible to solve the open problem of the algorithmic recognition of admissible rules. The article ends with some generalization of the definition of projective formulas—weakly projective formulas—and exhibits an easy example of their application.
PubDate: 2022-07-01

• Existence and Uniqueness of the Solution to a Degenerate Third Boundary
Value Problem for a Multidimensional Parabolic Equation

Abstract: Abstract We study the well-posedness of a third boundary value problem for a multidimensional parabolic equation in the case when the coefficient of the conormal derivative vanishes at some points. We show that under some conditions on the sign of this coefficient there exists nonexistence or nonuniqueness of a solution in the conventional anisotropic Sobolev space. Using the regularization method, we prove existence and uniqueness theorems for the regular solution in suitable weighted spaces.
PubDate: 2022-07-01

• An Observer-Based Stabilizing Controller for Linear Neutral Delay Systems

Abstract: Abstract This paper is concerned with feedback stabilization of linear delay systems of neutral type. When the unstable characteristic roots of the systems are far from the imaginary axis, the discretization of unstable differential equations results in a large error. In this case, it is difficult to seek stabilizing control laws via a direct extension of the algorithm provided in the literature. In order to remedy the difficulty, a modified state equation is constructed through a shifting parameter such that it is asymptotically stable. Then, basing on the modified state equation, we present some numerical algorithms to design the stabilizing controller and the observer of the neutral systems, respectively. Furthermore, we derive a separation property for the observer-based stabilizing controller of the neutral systems which extends the result in the literature.
PubDate: 2022-07-01

• De Rham’s Theorem for Orlicz Cohomology

Abstract: Abstract We prove that the de Rham $$L^{\phi}$$ -cohomology of a Riemannian manifold $$M$$ admitting a convenient triangulation $$X$$ is isomorphic to the simplicial $$\ell^{\phi}$$ -cohomology of $$X$$ under some assumptions on the Young function $$\phi$$ . This result implies the quasi-isometry invariance of the first cohomology.
PubDate: 2022-07-01

• Formulas for Calculating the $3j$ -Symbols of the Representations of the
Lie Algebra  ${\mathfrak{gl}}_{3}$ for the Gelfand–Tsetlin Bases

Abstract: Abstract We give a simple explicit formula for an arbitrary $$3j$$ -symbol for the Lie algebra  $${\mathfrak{gl}}_{3}$$ . The symbol is expressed as the ratio of values of hypergeometric functions with $$\pm 1$$ substituted for all arguments. Finding a  $$3j$$ -symbol is essentially equivalent to the determination of an arbitrary Clebsch–Gordan coefficient for  $${\mathfrak{gl}}_{3}$$ . The coefficients are important in the quark theory of quantum mechanics.
PubDate: 2022-07-01

• Combinatorial Structure of Faces in Triangulations on Surfaces

Abstract: Abstract The degree $$d(x)$$ of a vertex or face $$x$$ in a graph $$G$$ on the plane or other orientable surface is the number of incident edges. A face $$f=v_{1}\ldots v_{d(f)}$$ is of type $$(k_{1},k_{2},\dots)$$ if $$d(v_{i})\leq k_{i}$$ whenever $$1\leq i\leq d(f)$$ . We denote the minimum vertex-degree of  $$G$$ by  $$\delta$$ . The purpose of our paper is to prove that every triangulation with $$\delta\geq 4$$ of the torus, as well as of large enough such a triangulation of any fixed orientable surface of higher genus has a face of one of the types $$(4,4,\infty)$$ , $$(4,6,12)$$ , $$(4,8,8)$$ , $$(5,5,8)$$ , $$(5,6,7)$$ , or $$(6,6,6)$$ , where all parameters are best possible.
PubDate: 2022-07-01

• Finite Groups with Solvable or $\Phi$ -Simple Maximal Subgroups

Abstract: Abstract We study the structure of nonsolvable finite groups whose every nonsolvable maximal subgroup is $$\Phi$$ -simple.
PubDate: 2022-07-01

• Nonlinear Mixed Jordan Triple $*$ -Derivations on $*$ -Algebras

Abstract: Abstract Let $${\mathcal{A}}$$ be a unital $$\ast$$ -algebra containing a nontrivial projection. Under some mild conditions on  $${\mathcal{A}}$$ , it is shown that a map $$\Phi:{\mathcal{A}}\rightarrow{\mathcal{A}}$$ is a nonlinear mixed Jordan triple $$*$$ -derivation if and only if  $$\Phi$$ is an additive $$*$$ -derivation. In particular, we apply the above result to prime $$\ast$$ -algebras, von Neumann algebras with no central summands of type $$I_{1}$$ , factor von Neumann algebras, and standard operator algebras.
PubDate: 2022-07-01

• Existence of Attractors for Approximations to the Bingham Model and Their
Convergence to the Attractors of the Initial Model

Abstract: Abstract Considering the Bingham fluid motion model, we study the approximation problem, prove its unique solvability, and the existence of attractors. We show that the attractors of the approximation problem converge to the attractors of the Bingham model in the sense of the Hausdorff semidistance in the corresponding metric space as the approximation parameter vanishes.
PubDate: 2022-07-01

• Finite Groups with Subnormal Residuals of Sylow Normalizers

Abstract: Abstract Considering a nonempty formation $${\mathfrak{X}}$$ of nilpotent groups, we prove that a group $$G$$ is an extension of a nilpotent group by an $${\mathfrak{X}}$$ -group if and only if every Sylow normalizer in $$G$$ is solvable and its $${\mathfrak{X}}$$ -residual is subnormal in $$G$$ . We also show that  $$G$$ is supersolvable if and only if every Sylow normalizer in $$G$$ is supersolvable and its nilpotent residual is subnormal in $$G$$ .
PubDate: 2022-07-01

• Abnormal Extremals of Left-Invariant Sub-Finsler Quasimetrics on
Four-Dimensional Lie Groups with Three-Dimensional Generating
Distributions

Abstract: Abstract We find the three-dimensional subspaces of four-dimensional Lie algebras which generate the algebras, as well as abnormal extremals on the connected Lie groups determined by these algebras and endowed with the left-invariant sub-Finsler quasimetrics defined by seminorms on the subspaces. Using the structure constants of Lie algebras and dual seminorms, we establish a criterion for the strict abnormality of the extremals.
PubDate: 2022-07-01

• Semiexponential Distributions and Related Large Deviation Principles for
Trajectories of Random Walks

Abstract: Abstract We obtain a rather simple characterization of semiexponential distributions. This allows us to relax substantially the conditions for the fulfillment of the moderately large deviation principle for the trajectories of random walks when Cramér’s condition does not hold. Besides, using the previous results, we establish the local large deviation principle (LDP) outside the zone of moderately large deviations for semiexponential random walks. The latter principle differs much from the LDP in the case that Cramér’s condition holds: The deviation function for it is concave but not convex, the deviation functional is finite only on jump trajectories, and so forth.
PubDate: 2022-07-01

• Right Alternative Unital Bimodules over the Matrix Algebras of Order
$\geq 3$

Abstract: Abstract We address the unital right alternative bimodules over the matrix algebras  $${\mathrm{M}}_{n}(\Phi)$$ of order $$n\geq 3$$ , prove that each of these bimodules is the direct sum of an associative bimodule and a Graves bimodule, and fully describe the structure of twisted Graves bimodules. Also, we construct an irreducible right alternative $${\mathrm{M}}_{n}(\Phi)$$ -bimodule of minimal dimension $$n(n-1)$$ . Furthermore, we show that no element  $$f(x,y)$$ of the free right alternative algebra of rank 3 is its nuclear element. The results of this article are needed for the study of the right alternative superalgebras whose even part includes  $${\mathrm{M}}_{n}(\Phi)$$ with $$n\geq 3$$ .
PubDate: 2022-07-01

• Representations, Products, and Varieties of  $m$ -Groups

Abstract: Abstract Under study is the structure of the $$m$$ -homomorphic images of $$m$$ -subgroups in a Cartesian product of $$m$$ -groups which admit a faithful $$m$$ -transitive representation. We propose some construction that enables us to produce idempotents in the semigroup of varieties of $$m$$ -groups.
PubDate: 2022-07-01

• Estimates of Solutions to Infinite Systems of Linear Equations and the
Problem of Interpolation by Cubic Splines on the Real Line

Abstract: Abstract We study the solvability of bi-infinite systems of linear equations whose matrices are diagonally dominant. We prove that the estimates of the norm of the solution in terms of the diagonal dominance value well-known in the case of finite systems of linear equations are also valid for bi-infinite systems of equations. The estimates are used in interpolation by splines on nonuniform meshes on the real line. Using the estimates, we prove the existence and uniqueness of a cubic spline of linear or quadratic growth interpolating data of linear or quadratic growth, without any constraints on node spacing. The familiar estimates of the interpolation error on a segment are carried over to the case of interpolation on the whole real line.
PubDate: 2022-07-01

• Rota–Baxter Operators on the Simple Jordan Superalgebra  $D_{t}$

Abstract: Abstract Up to conjugation by an automorphism, we describe the Rota–Baxter operators of weight zero or nonzero on the simple four-dimensional Jordan superalgebra  $$D_{t}$$ over an algebraically closed field of characteristic 0. The description includes the classification of all decompositions of  $$D_{t}$$ into a direct sum of two subalgebras.
PubDate: 2022-07-01

• An Algorithm for Constructing the Rectangular Diagrams of
a Seifert Surface

Abstract: Abstract We present an algorithm for constructing a rectangular diagram of a Seifert surface for the link represented by an arbitrary rectangular diagram and estimate the complexity of the resulting surface diagram.
PubDate: 2022-05-01
DOI: 10.1134/S003744662203017X

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