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 Showing 1 - 200 of 538 Journals sorted alphabetically Abakós       (Followers: 5) Abhandlungen aus dem Mathematischen Seminar der Universitat Hamburg       (Followers: 3) Accounting Perspectives       (Followers: 9) ACM Transactions on Algorithms (TALG)       (Followers: 17) ACM Transactions on Computational Logic (TOCL)       (Followers: 5) ACM Transactions on Mathematical Software (TOMS)       (Followers: 9) ACS Applied Materials & Interfaces       (Followers: 44) Acta Applicandae Mathematicae       (Followers: 2) Acta Mathematica       (Followers: 11) Acta Mathematica Hungarica       (Followers: 2) Acta Mathematica Scientia       (Followers: 5) Acta Mathematica Sinica, English Series       (Followers: 6) Acta Mathematica Vietnamica Acta Mathematicae Applicatae Sinica, English Series Advanced Science Letters       (Followers: 13) Advances in Applied Clifford Algebras       (Followers: 6) Advances in Catalysis       (Followers: 8) Advances in Complex Systems       (Followers: 12) Advances in Computational Mathematics       (Followers: 23) Advances in Decision Sciences       (Followers: 4) Advances in Difference Equations       (Followers: 5) Advances in Fixed Point Theory       (Followers: 9) Advances in Geosciences (ADGEO)       (Followers: 22) Advances in Linear Algebra & Matrix Theory       (Followers: 10) Advances in Materials Science       (Followers: 22) Advances in Mathematical Physics       (Followers: 10) Advances in Mathematics       (Followers: 22) Advances in Numerical Analysis       (Followers: 8) Advances in Operations Research       (Followers: 14) Advances in Operator Theory       (Followers: 4) Advances in Porous Media       (Followers: 6) Advances in Pure Mathematics       (Followers: 11) Advances in Science and Research (ASR)       (Followers: 8) Aequationes Mathematicae       (Followers: 2) African Journal of Educational Studies in Mathematics and Sciences       (Followers: 12) African Journal of Mathematics and Computer Science Research       (Followers: 7) Afrika Matematika       (Followers: 3) Air, Soil & Water Research       (Followers: 13) AKSIOMA Journal of Mathematics Education       (Followers: 4) AKSIOMATIK : Jurnal Penelitian Pendidikan dan Pembelajaran Matematika       (Followers: 1) Al-Jabar : Jurnal Pendidikan Matematika       (Followers: 1) Al-Qadisiyah Journal for Computer Science and Mathematics       (Followers: 1) AL-Rafidain Journal of Computer Sciences and Mathematics       (Followers: 6) Algebra and Logic       (Followers: 8) Algebra Colloquium       (Followers: 4) Algebra Universalis       (Followers: 2) Algorithmic Operations Research       (Followers: 5) Algorithms       (Followers: 14) Algorithms Research       (Followers: 2) American Journal of Computational and Applied Mathematics       (Followers: 10) American Journal of Mathematical Analysis       (Followers: 2) American Journal of Mathematical and Management Sciences       (Followers: 1) American Journal of Mathematics       (Followers: 9) American Journal of Operations Research       (Followers: 8) American Mathematical Monthly       (Followers: 7) An International Journal of Optimization and Control: Theories & Applications       (Followers: 13) Analele Universitatii Ovidius Constanta - Seria Matematica Analysis and Applications       (Followers: 2) Analysis and Mathematical Physics       (Followers: 10) Analysis Mathematica Anargya : Jurnal Ilmiah Pendidikan Matematika       (Followers: 8) Annales Mathematicae Silesianae       (Followers: 2) Annales mathématiques du Québec       (Followers: 4) Annales Universitatis Mariae Curie-Sklodowska, sectio A – Mathematica       (Followers: 1) Annales Universitatis Paedagogicae Cracoviensis. 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Matematica       (Followers: 15) Bulletin des Sciences Mathamatiques       (Followers: 4) Bulletin of Dnipropetrovsk University. Series : Communications in Mathematical Modeling and Differential Equations Theory       (Followers: 3) Bulletin of Mathematical Sciences       (Followers: 1) Bulletin of Symbolic Logic       (Followers: 3) Bulletin of Taras Shevchenko National University of Kyiv. Series: Physics and Mathematics Bulletin of the Australian Mathematical Society       (Followers: 2) Bulletin of the Brazilian Mathematical Society, New Series Bulletin of the Iranian Mathematical Society Bulletin of the London Mathematical Society       (Followers: 3) Bulletin of the Malaysian Mathematical Sciences Society Cadernos do IME : Série Matemática       (Followers: 2) Calculus of Variations and Partial Differential Equations Canadian Journal of Mathematics / Journal canadien de mathématiques Canadian Journal of Science, Mathematics and Technology Education       (Followers: 23) Canadian Mathematical Bulletin Carpathian Mathematical Publications       (Followers: 1) Catalysis in Industry       (Followers: 1) CEAS Space Journal       (Followers: 6) CHANCE       (Followers: 5) Chaos, Solitons & Fractals       (Followers: 3) Chaos, Solitons & Fractals : X       (Followers: 1) ChemSusChem       (Followers: 8) Chinese Annals of Mathematics, Series B Chinese Journal of Catalysis       (Followers: 3) Chinese Journal of Mathematics Ciencia       (Followers: 1) CODEE Journal       (Followers: 2) Cogent Mathematics       (Followers: 2) Cognitive Computation       (Followers: 3) Collectanea Mathematica College Mathematics Journal       (Followers: 4) COMBINATORICA Combinatorics, Probability and Computing       (Followers: 4) Combustion Theory and Modelling       (Followers: 17) Commentarii Mathematici Helvetici Communications in Advanced Mathematical Sciences Communications in Combinatorics and Optimization Communications in Contemporary Mathematics Communications in Mathematical Physics       (Followers: 4) Communications On Pure & Applied Mathematics       (Followers: 5) Complex Analysis and its Synergies       (Followers: 3) Complex Variables and Elliptic Equations: An International Journal Composite Materials Series       (Followers: 11) Compositio Mathematica Comptes Rendus : Mathematique Computational and Applied Mathematics       (Followers: 4) Computational and Mathematical Methods Computational and Mathematical Methods in Medicine       (Followers: 3) Computational and Mathematical Organization Theory       (Followers: 1) Computational Complexity       (Followers: 4) Computational Mathematics and Modeling       (Followers: 9) Computational Mechanics       (Followers: 10) Computational Methods and Function Theory Computational Optimization and Applications       (Followers: 11) Computers & Mathematics with Applications       (Followers: 11) Confluentes Mathematici Constructive Mathematical Analysis       (Followers: 1) Contributions to Discrete Mathematics       (Followers: 1) Contributions to Game Theory and Management COSMOS       (Followers: 1) Cryptography and Communications       (Followers: 14) Cuadernos de Investigación y Formación en Educación Matemática Cubo. A Mathematical Journal Current Research in Biostatistics       (Followers: 8) Czechoslovak Mathematical Journal       (Followers: 1) Daya Matematis : Jurnal Inovasi Pendidikan Matematika       (Followers: 1) Demographic Research       (Followers: 16) Design Journal : An International Journal for All Aspects of Design       (Followers: 35) Desimal : Jurnal Matematika       (Followers: 3) Developments in Clay Science       (Followers: 1) Developments in Mineral Processing       (Followers: 3) Dhaka University Journal of Science Differential Equations and Dynamical Systems       (Followers: 4)

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Similar Journals
 Annales Mathematicae SilesianaeNumber of Followers: 2     Open Access journal ISSN (Print) 0860-2107 - ISSN (Online) 2391-4238 Published by Sciendo  [476 journals]
• A Separately Continuous Function Not Somewhat Continuous

• Abstract: We construct a separately continuous function f : ℚ × ℚ → [0; 1] and a dense subset D ⊆ ℚ × ℚ such that f[D] is not dense in f[ℚ × ℚ], in other words, f is separately continuous and not somewhat (feebly) continuous.
PubDate: Mon, 11 Oct 2021 00:00:00 GMT

• The Cosine-Sine Functional Equation on Semigroups

• Abstract: The primary object of study is the “cosine-sine” functional equation f(xy) = f(x)g(y)+g(x)f(y)+h(x)h(y) for unknown functions f, g, h : S → ℂ, where S is a semigroup. The name refers to the fact that it contains both the sine and cosine addition laws. This equation has been solved on groups and on semigroups generated by their squares. Here we find the solutions on a larger class of semigroups and discuss the obstacles to finding a general solution for all semigroups. Examples are given to illustrate both the results and the obstacles.We also discuss the special case f(xy) = f(x)g(y) + g(x)f(y) − g(x)g(y) separately, since it has an independent direct solution on a general semigroup.We give the continuous solutions on topological semigroups for both equations.
PubDate: Tue, 05 Oct 2021 00:00:00 GMT

• A Note on Amalgamated Rings Along an Ideal

• Abstract: Ring properties of amalgamated products are investigated. We offer new, elementary arguments which extend results from [5] and [12] to noncommutative setting and also give new properties of amalgamated rings.
PubDate: Mon, 30 Aug 2021 00:00:00 GMT

• Results in Strongly Minihedral Cone and Scalar Weighted Cone Metric Spaces
and Applications

• Abstract: The convergence of sequences and non-unique fixed points are established in ℳ-orbitally complete cone metric spaces over the strongly minihedral cone, and scalar weighted cone assuming the cone to be strongly minihedral. Appropriate examples and applications validate the established theory. Further, we provide one more answer to the question of the existence of the contractive condition in Cone metric spaces so that the fixed point is at the point of discontinuity of a map. Also, we provide a negative answer to a natural question of whether the contractive conditions in the obtained results can be replaced by its metric versions.
PubDate: Mon, 30 Aug 2021 00:00:00 GMT

• The Law of the Iterated Logarithm for Random Dynamical System with Jumps
and State-Dependent Jump Intensity

• Abstract: In this paper our considerations are focused on some Markov chain associated with certain piecewise-deterministic Markov process with a statedependent jump intensity for which the exponential ergodicity was obtained in [4]. Using the results from [3] we show that the law of iterated logarithm holds for such a model.
PubDate: Mon, 30 Aug 2021 00:00:00 GMT

• A Note on Two Fundamental Recursive Sequences

• Abstract: In this note, we establish some general results for two fundamental recursive sequences that are the basis of many well-known recursive sequences, as the Fibonacci sequence, Lucas sequence, Pell sequence, Pell-Lucas sequence, etc. We establish some general limit formulas, where the product of the first n terms of these sequences appears. Furthermore, we prove some general limits that connect these sequences to the number e(≈ 2.71828...).
PubDate: Tue, 27 Jul 2021 00:00:00 GMT

• MHD Equations in a Bounded Domain

• Abstract: We consider the MHD system in a bounded domain Ω ⊂ ℝN , N = 2, 3, with Dirichlet boundary conditions. Using Dan Henry’s semigroup approach and Giga–Miyakawa estimates we construct global in time, unique solutions to fractional approximations of the MHD system in the base space (L2(Ω))N × (L2(Ω))N. Solutions to MHD system are obtained next as a limits of that fractional approximations.
PubDate: Tue, 27 Jul 2021 00:00:00 GMT

• Operator Subadditivity of the 𝒟-Logarithmic Integral Transform for
Positive Operators in Hilbert Spaces

• Abstract: For a continuous and positive function w (λ), λ> 0 and µ a positive measure on [0, ∞) we consider the following 𝒟-logarithmic integral transform𝒟ℒog(w,μ)(T):=∫0∞w(λ)1n(λ+Tλ)dμ(λ),\mathcal{D}\mathcal{L}og\left( {w,\mu } \right)\left( T \right): = \int_0^\infty {w\left( \lambda \right)1{\rm{n}}\left( {{{\lambda + T} \over \lambda }} \right)d\mu \left( \lambda \right),}where the integral is assumed to exist for T a positive operator on a complex Hilbert space H.We show among others that, if A, B > 0 with BA + AB ≥ 0, then𝒟ℒog(w,μ)(A)+𝒟ℒog(w,μ)(B)≥𝒟ℒog(w,μ)(A+B).\mathcal{D}\mathcal{L}og\left( {w,\mu } \right)\left( A \right) + \mathcal{D}\mathcal{L}og\left( {w,\mu } \right)\left( B \right) \ge \mathcal{D}\mathcal{L}og\left( {w,\mu } \right)\left( {A + B} \right).In particular we have16π2+dilog(A+B)≥dilog(A)+dilog(B),{1 \over 6}{\pi ^2} + {\rm{di}}\log \left( {A + B} \right) \ge {\rm{di}}\log \left( A \right) + {\rm{di}}\log \left( B \right),where the dilogarithmic function dilog : [0, ∞) → ℝ is defined bydilog(t):=∫1t1ns1-sds,    t≥0.{\rm{di}}\log \left( t \right): = \int_1^t {{{1ns} \over {1 - s}}ds,} \,\,\,\,t \ge 0.Some examples for integr...
PubDate: Wed, 26 May 2021 00:00:00 GMT

• Sandwich Type Results for -Convex Real Functions

• Abstract: We establish necessary and sufficient conditions allowing separation of pair of real functions by an m-convex and by an m-affine function. Some examples and a geometric interpretation of m-convexity of a function is exhibited, as well as a Jensen’s inequality for this kind of function.
PubDate: Wed, 26 May 2021 00:00:00 GMT

• A New Proof and Consequences of the Fixed Point Theorem of Matkowski

• Abstract: In this work it was proved Matkowski’s fixed point theorem. The consequences of this theorem are also presented.
PubDate: Wed, 26 May 2021 00:00:00 GMT

• Triality Groups Associated with Triple Systems and their Homotope Algebras

• Abstract: We introduce the notion of an (α, β, γ) triple system, which generalizes the familiar generalized Jordan triple system related to a construction of simple Lie algebras. We then discuss its realization by considering some bilinear algebras and vice versa. Next, as a new concept, we study triality relations (a triality group and a triality derivation) associated with these triple systems; the relations are a generalization of the automorphisms and derivations of the triple systems. Also, we provide examples of several involutive triple systems with a tripotent element.
PubDate: Tue, 13 Apr 2021 00:00:00 GMT

• Some Fixed Point Theorems Via Combination of Weak Contraction and Caristi
Contractive Mapping

• Abstract: In this paper we introduce some new types of contractive mappings by combining Caristi contraction, Ćirić-quasi contraction and weak contraction in the framework of a metric space. We prove some fixed point theorems for such type of mappings over complete metric spaces with the help of φ-diminishing property. Some examples are given in strengthening the hypothesis of our established theorems.
PubDate: Tue, 13 Apr 2021 00:00:00 GMT

• A Note on the Asymptotic Behavior of the Distribution Function of a
General Sequence

• Abstract: The aim of this note is to study the distribution function of certain sequences of positive integers, including, for example, Bell numbers, factorials and primorials. In fact, we establish some general asymptotic formulas in this regard. We also prove some limits that connect these sequences with the number e. Furthermore, we present a generalization of the primorial.
PubDate: Tue, 26 Jan 2021 00:00:00 GMT

• Generalized Fractional Inequalities of the Hermite–Hadamard Type for
Convex Stochastic Processes

• Abstract: A generalization of the Hermite–Hadamard (HH) inequality for a positive convex stochastic process, by means of a newly proposed fractional integral operator, is hereby established. Results involving the Riemann– Liouville, Hadamard, Erdélyi–Kober, Katugampola, Weyl and Liouville fractional integrals are deduced as particular cases of our main result. In addition, we also apply some known HH results to obtain some estimates for the expectations of integrals of convex and p-convex stochastic processes. As a side note, we also pointed out a mistake in the main result of the paper [Hermite–Hadamard type inequalities, convex stochastic processes and Katugampola fractional integral, Revista Integración, temas de matemáticas 36 (2018), no. 2, 133–149]. We anticipate that the idea employed herein will inspire further research in this direction.
PubDate: Thu, 17 Dec 2020 00:00:00 GMT

• Thermodynamic Formalism Methods In the Theory of Iteration of Mappings in
Dimension One, Real and Complex

• PubDate: Mon, 14 Dec 2020 00:00:00 GMT

• Summing a Family of Generalized Pell Numbers

• Abstract: A new family of generalized Pell numbers was recently introduced and studied by Bród ([2]). These numbers possess, as Fibonacci numbers, a Binet formula. Using this, partial sums of arbitrary powers of generalized Pell numbers can be summed explicitly. For this, as a first step, a power P𝓁n is expressed as a linear combination of Pmn. The summation of such expressions is then manageable using generating functions. Since the new family contains a parameter R = 2r, the relevant manipulations are quite involved, and computer algebra produced huge expressions that where not trivial to handle at times.
PubDate: Mon, 14 Dec 2020 00:00:00 GMT

• A Variant of D’alembert’s Matrix Functional Equation

• Abstract: The aim of this paper is to characterize the solutions Φ : G → M2(ℂ) of the following matrix functional equationsΦ(xy)+Φ(σ(y)x)2=Φ(x)Φ(y),      x,y,∈G,{{\Phi \left( {xy} \right) + \Phi \left( {\sigma \left( y \right)x} \right)} \over 2} = \Phi \left( x \right)\Phi \left( y \right),\,\,\,\,\,\,x,y, \in G,andΦ(xy)−Φ(σ(y)x)2=Φ(x)Φ(y),      x,y,∈G,{{\Phi \left( {xy} \right) - \Phi \left( {\sigma \left( y \right)x} \right)} \over 2} = \Phi \left( x \right)\Phi \left( y \right),\,\,\,\,\,\,x,y, \in G,where G is a group that need not be abelian, and σ : G → G is an involutive automorphism of G. Our considerations are inspired by the papers [13, 14] in which the continuous solutions of the first equation on abelian topological groups were determined.
PubDate: Mon, 14 Dec 2020 00:00:00 GMT

• Families of Commuting Formal Power Series and Formal Functional Equations

• Abstract: In this paper we describe families of commuting invertible formal power series in one indeterminate over ℂ, using the method of formal functional equations. We give a characterization of such families where the set of multipliers (first coefficients) σ of its members F (x) = σx + . . . is infinite, in particular of such families which are maximal with respect to inclusion, so called families of type I. The description of these families is based on Aczél–Jabotinsky differential equations, iteration groups, and on some results on normal forms of invertible series with respect to conjugation.
PubDate: Tue, 06 Oct 2020 00:00:00 GMT

• Generalized Tetranacci Hybrid Numbers

• Abstract: In this paper, we introduce the generalized Tetranacci hybrid numbers and, as special cases, Tetranacci and Tetranacci-Lucas hybrid numbers. Moreover, we present Binet’s formulas, generating functions, and the summation formulas for those hybrid numbers.
PubDate: Tue, 06 Oct 2020 00:00:00 GMT

• On the Radon-Nikodym Property for Vector Measures and Extensions of
Transfunctions

• Abstract: If (μn)n=1∞\left( {{\mu _n}} \right)_{n = 1}^\infty are positive measures on a measurable space (X, Σ) and (vn)n=1∞\left( {{v_n}} \right)_{n = 1}^\infty are elements of a Banach space 𝔼 such that ∑n=1∞‖vn‖μn(X)<∞\sum\nolimits_{n = 1}^\infty {\left\ {{v_n}} \right\ {\mu _n}\left( X \right)} < \infty, then ω(S)=∑n=1∞vnμn(S)\omega \left( S \right) = \sum\nolimits_{n = 1}^\infty {{v_n}{\mu _n}\left( S \right)} defines a vector measure of bounded variation on (X, Σ). We show 𝔼 has the Radon-Nikodym property if and only if every 𝔼-valued measure of bounded variation on (X, Σ) is of this form. This characterization of the Radon-Nikodym property leads to a new proof of the Lewis-Stegall theorem.We also use this result to show that under natural conditions an operator defined on positive measures has a unique extension to an operator defined on 𝔼-valued measures for any Banach space 𝔼 that has the Radon-Nikodym property.
PubDate: Tue, 06 Oct 2020 00:00:00 GMT

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