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)                  1 2 3 4 | Last
 Showing 1 - 200 of 538 Journals sorted alphabetically Abakós       (Followers: 4) Abhandlungen aus dem Mathematischen Seminar der Universitat Hamburg       (Followers: 2) Accounting Perspectives       (Followers: 4) ACM Transactions on Algorithms (TALG)       (Followers: 13) ACM Transactions on Computational Logic (TOCL)       (Followers: 5) ACM Transactions on Mathematical Software (TOMS)       (Followers: 6) ACS Applied Materials & Interfaces       (Followers: 44) Acta Applicandae Mathematicae       (Followers: 2) Acta Mathematica Hungarica       (Followers: 3) Acta Mathematica Sinica, English Series       (Followers: 5) Acta Mathematica Vietnamica Acta Mathematicae Applicatae Sinica, English Series Advanced Science Letters       (Followers: 9) Advances in Applied Clifford Algebras       (Followers: 6) Advances in Catalysis       (Followers: 7) Advances in Complex Systems       (Followers: 10) Advances in Computational Mathematics       (Followers: 16) Advances in Decision Sciences       (Followers: 4) Advances in Difference Equations       (Followers: 4) Advances in Fixed Point Theory Advances in Geosciences (ADGEO)       (Followers: 21) Advances in Linear Algebra & Matrix Theory       (Followers: 7) Advances in Materials Science       (Followers: 23) Advances in Mathematical Physics       (Followers: 6) Advances in Mathematics       (Followers: 18) Advances in Numerical Analysis       (Followers: 4) Advances in Operations Research       (Followers: 13) Advances in Operator Theory Advances in Pure Mathematics       (Followers: 10) Advances in Science and Research (ASR)       (Followers: 8) Aequationes Mathematicae       (Followers: 2) African Journal of Educational Studies in Mathematics and Sciences       (Followers: 8) African Journal of Mathematics and Computer Science Research       (Followers: 5) Afrika Matematika       (Followers: 2) Air, Soil & Water Research       (Followers: 7) AKSIOMATIK : Jurnal Penelitian Pendidikan dan Pembelajaran Matematika Al-Jabar : Jurnal Pendidikan Matematika Al-Qadisiyah Journal for Computer Science and Mathematics       (Followers: 3) AL-Rafidain Journal of Computer Sciences and Mathematics       (Followers: 4) Algebra and Logic       (Followers: 9) Algebra Colloquium       (Followers: 3) Algebra Universalis       (Followers: 3) Algorithmic Operations Research       (Followers: 7) Algorithms       (Followers: 15) Algorithms Research       (Followers: 2) American Journal of Computational and Applied Mathematics       (Followers: 4) American Journal of Mathematical Analysis       (Followers: 1) American Journal of Mathematical and Management Sciences American Journal of Mathematics       (Followers: 8) American Journal of Operations Research       (Followers: 6) American Mathematical Monthly       (Followers: 3) 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: 7) Anargya : Jurnal Ilmiah Pendidikan Matematika Annales Mathematicae Silesianae Annales mathématiques du Québec       (Followers: 3) Annales Universitatis Mariae Curie-Sklodowska, sectio A – Mathematica       (Followers: 1) Annales Universitatis Paedagogicae Cracoviensis. Studia Mathematica Annali di Matematica Pura ed Applicata       (Followers: 1) Annals of Combinatorics       (Followers: 3) Annals of Data Science       (Followers: 17) Annals of Functional Analysis       (Followers: 2) Annals of Mathematics       (Followers: 5) Annals of Mathematics and Artificial Intelligence       (Followers: 13) Annals of PDE Annals of Pure and Applied Logic       (Followers: 5) Annals of the Alexandru Ioan Cuza University - Mathematics       (Followers: 1) Annals of the Institute of Statistical Mathematics       (Followers: 1) Annals of West University of Timisoara - Mathematics       (Followers: 1) Annals of West University of Timisoara - Mathematics and Computer Science       (Followers: 2) Annuaire du Collège de France       (Followers: 6) ANZIAM Journal       (Followers: 1) Applicable Algebra in Engineering, Communication and Computing       (Followers: 3) Applications of Mathematics       (Followers: 3) Applied Categorical Structures       (Followers: 5) Applied Computational Intelligence and Soft Computing       (Followers: 17) Applied Mathematics       (Followers: 6) Applied Mathematics       (Followers: 6) Applied Mathematics & Optimization       (Followers: 7) Applied Mathematics - A Journal of Chinese Universities       (Followers: 1) Applied Mathematics and Nonlinear Sciences       (Followers: 1) Applied Mathematics Letters       (Followers: 4) Applied Mathematics Research eXpress       (Followers: 1) Applied Network Science       (Followers: 3) Applied Numerical Mathematics       (Followers: 4) Applied Spatial Analysis and Policy       (Followers: 5) Arab Journal of Mathematical Sciences       (Followers: 3) Arabian Journal of Mathematics       (Followers: 1) Archive for Mathematical Logic       (Followers: 3) Archive of Applied Mechanics       (Followers: 4) Archive of Numerical Software Archives of Computational Methods in Engineering       (Followers: 5) Armenian Journal of Mathematics Arnold Mathematical Journal       (Followers: 1) Artificial Satellites       (Followers: 22) Asia-Pacific Journal of Operational Research       (Followers: 3) Asian Journal of Algebra       (Followers: 1) Asian Research Journal of Mathematics Asian-European Journal of Mathematics       (Followers: 2) Australian Mathematics Teacher, The       (Followers: 7) Australian Primary Mathematics Classroom       (Followers: 5) Australian Senior Mathematics Journal       (Followers: 1) Automatic Documentation and Mathematical Linguistics       (Followers: 5) Axioms       (Followers: 1) Baltic International Yearbook of Cognition, Logic and Communication       (Followers: 2) Banach Journal of Mathematical Analysis Basin Research       (Followers: 6) BIBECHANA Biomath BIT Numerical Mathematics Boletim Cearense de Educação e História da Matemática Boletim de Educação Matemática Boletín de la Sociedad Matemática Mexicana Bollettino dell'Unione Matematica Italiana British Journal for the History of Mathematics       (Followers: 2) British Journal of Mathematical and Statistical Psychology       (Followers: 18) British Journal of Mathematics & Computer Science       (Followers: 1) Buletinul Academiei de Stiinte a Republicii Moldova. 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A Mathematical Journal Current Research in Biostatistics       (Followers: 8) Czechoslovak Mathematical Journal Daya Matematis : Jurnal Inovasi Pendidikan Matematika Demographic Research       (Followers: 14) Design Journal : An International Journal for All Aspects of Design       (Followers: 35) Desimal : Jurnal Matematika Dhaka University Journal of Science Differential Equations and Dynamical Systems       (Followers: 3) Differentsial'nye Uravneniya Digital Experiences in Mathematics Education       (Followers: 3) Discrete Mathematics       (Followers: 7) Discrete Mathematics & Theoretical Computer Science       (Followers: 1) Discrete Mathematics, Algorithms and Applications       (Followers: 2) Discussiones Mathematicae - General Algebra and Applications Discussiones Mathematicae Graph Theory       (Followers: 1) Diskretnaya Matematika Doklady Akademii Nauk

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Similar Journals
 Aequationes MathematicaeJournal Prestige (SJR): 0.517 Citation Impact (citeScore): 1Number of Followers: 2      Hybrid journal (It can contain Open Access articles) ISSN (Print) 1420-8903 - ISSN (Online) 0001-9054 Published by Springer-Verlag  [2467 journals]
• Transitive quasi-uniform structures depending on a parameter

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Abstract: Abstract In a category $${\mathcal {C}}$$ with an ( $${\mathcal {E}}$$ , $${\mathcal {M}}$$ )-factorization structure for morphisms, we prove that any subclass $${\mathcal {N}}$$ of $${\mathcal {M}}$$ which is closed under pullbacks determines a transitive quasi-uniform structure on $${\mathcal {C}}$$ . In addition to providing a categorical characterization of all transitive quasi-uniform structures compatible with a topology, this result also permits us to establish a number of Galois connections related to quasi-uniform structures on $${\mathcal {C}}$$ . These Galois connections lead to the description of subcategories of $${\mathcal {C}}$$ determined by quasi-uniform structures. Several examples considered at the end of the paper illustrate our results.
PubDate: 2023-01-11

• Sincov’s and other functional equations and negative interest rates

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Abstract: Abstract Investigating the future value F(K, s, t) of a capital K invested between dates s and t, the “natural” condition $$F(K,s,t)\ge K$$ has lost its naturality because of the strange fact of negative interest rates. This leads to the task of describing the possible solutions of the multiplicative Sincov equation $$f(s,u)=f(s,t)f(t,u)$$ for $$s\le t\le u$$ where $$f(s,t)=0$$ may happen. In this paper we solve this task and discuss connections to the theory of investments.
PubDate: 2023-01-03

• Characterizations of derivations on spaces of smooth functions

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Abstract: Abstract We provide a list of equivalent conditions under which an additive operator acting on a space of smooth functions on a compact real interval is a multiple of the derivation.
PubDate: 2022-12-30

• Hyers-Ulam stability of an  iterative  equation  for  strictly
increasing continuous functions

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Abstract: Abstract The Hyers-Ulam stability of the iterative equation $$f^n=F$$ for continuous functions F was studied under the assumptions that F is a homeomorphism on its range, and the equation has stability on its range. It is important to study the stability of the equation for homeomorphisms on intervals. In this paper, theorems on stability are obtained using the properties of monotonic approximate solutions. The method is based on the stability of two derived iterative equations.
PubDate: 2022-12-27

• On forward-order law for core inverse in rings

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Abstract: Abstract This article establishes a few sufficient conditions of the forward-order law for the core inverse of elements in rings with involution. It also presents the forward-order law for the weighted core inverse and the triple forward-order law for the core inverse. Additionally, we discuss the hybrid forward-order law involving different generalized inverses like the Moore–Penrose inverse, the group inverse, and the core inverse.
PubDate: 2022-12-26

• A note on the four color theorem

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Abstract: Abstract Probably the best strategy to give a computer-free proof of the 4-color theorem is to show that the chromatic polynomial of any planar graph evaluated at 4 is nonzero. After making assumptions like no danglers and adding edges if necessary, a connected graph is a ”web” of ”interlocking wheels”. If G is a web of k interlocking wheels obtained from a planar graph, it is conjectured that its chromatic polynomial $$P(G,t) = P_1(t)+ \cdots + P_k(t)$$ with all $$P_j(4) >0$$ . In this paper, we prove the conjecture in the base case of the interlocking wheels $$W_m\wedge _2W_n$$ for $$k = 2$$ . As a byproduct, in the last section we apply our result to exponentially simplify the computations to find some interesting facts about a real life graph.
PubDate: 2022-12-17

• On digital sequences associated with Pascal’s triangle

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Abstract: Abstract We consider the sequence of integers whose nth term has base-p expansion given by the nth row of Pascal’s triangle modulo p (where p is a prime number). We first present and generalize well-known relations concerning this sequence. Then, with the great help of Sloane’s On-Line Encyclopedia of Integer Sequences, we show that it appears naturally as a subsequence of a 2-regular sequence. Its study provides interesting relations and surprisingly involves odious and evil numbers, Nim-sum and even Gray codes. Furthermore, we examine similar sequences emerging from prime numbers involving alternating sum-of-digits modulo p. This note ends with a discussion about Pascal’s pyramid built with trinomial coefficients.
PubDate: 2022-12-15

• On s-Stirling transform and poly-Cauchy numbers of the second kind with
level 2

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Abstract: Abstract In this paper, we study the transform by Stirling numbers with higher level, and give several concrete results. When $$s=2$$ , we consider the transform of rational sequences. In particular, poly-Cauchy numbers of the second kind with level 2 are introduced in order to achieve some extended results. We also give several properties of poly-Cauchy numbers of the second kind with level 2, which are related to those of poly-Bernoulli numbers with level 2 and analogous to those of poly-Cauchy numbers of the first kind with level 2.
PubDate: 2022-12-11

• On graceful antimagic graphs

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Abstract: Abstract A graceful labeling of a graph G is an injective function from the vertex set of G to the set $$\{0,1,\dots , E(G) \}$$ such that the induced edge labels are all different, where an induced edge label is defined as the absolute value of the difference between the labels of its end vertices. If the induced edge labeling is simultaneously antimagic, i.e., the sums of labels of all edges incident to a given vertex are pairwise distinct for different vertices, we say that the graceful labeling is graceful antimagic. In this paper we deal with the problem of finding some classes of graceful antimagic graphs.
PubDate: 2022-12-08

• Randomly r-orthogonal factorizations in bipartite graphs

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Abstract: Abstract Let G be a graph with vertex set V(G) and edge set E(G), and let f be an integer-valued function defined on V(G). It is proved in this paper that every bipartite $$(0,mf-m+1)$$ -graph has a (0, f)-factorization randomly r-orthogonal to n vertex-disjoint mr-subgraphs of G, which is a generalization of the known result with $$n=1$$ given by Zhou and Wu.
PubDate: 2022-12-05

• Pexiderized d’Alembert functional equations on monoids

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Abstract: Abstract Let S be a monoid ( $$=$$ semigroup with identity), and let $$\sigma :S \rightarrow S$$ be a homomorphism such that $$\sigma \circ \sigma = id$$ . In an earlier paper we solved the Pexiderized d’Alembert functional equation (PDFE) $$f(xy) + g(\sigma (y)x) = h(x)k(y)$$ for unknown $$f,g,h,k:S \rightarrow {{\mathbb {C}}}$$ , assuming that S is either regular or generated by its squares and that one of the unknown functions is central. The present paper has two main results. The first describes the solutions of PDFE on a general monoid in terms of multiplicative functions, solutions of a special case of the sine subtraction law, and solutions of other functional equations with just one unknown function. The second main result uses the first one to give a more detailed solution of PDFE on a larger class of monoids than has been treated previously. We also find the continuous solutions on topological monoids. Examples are given to illustrate the results.
PubDate: 2022-12-01

• Dimension preserving approximation

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Abstract: Abstract This article introduces the novel notion of dimension preserving approximation for continuous functions defined on [0, 1] and initiates the study of it. Restrictions and extensions of continuous functions in regards to fractal dimensions are also investigated.
PubDate: 2022-12-01

• Alienation of Drygas’, Cauchy’s, Jensen’s and the quadratic
equations on semigroups with an involutive automorphism

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Abstract: Abstract Let S be a semigroup that need not be abelian, $$\sigma :S\rightarrow S$$ be an involutive endomorphism and let $$(H,+)$$ be a uniquely 2-divisible abelian group. We study the solutions $$f,g:S\rightarrow H$$ of each of the functional equations \begin{aligned} f(xy)+g(xy)+g(x\sigma (y))=f(x)+f(y)+2g(x)+2g(y), \end{aligned} and \begin{aligned} f(xy)+g(xy)+g(x\sigma (y))=f(x)+f(y)+2g(x)+g(y)+g(\sigma (y)). \end{aligned} Moreover, we show that the Jensen type equation $$f(xy)+f(x\sigma (y))=2f(x)\$$ and the generalized quadratic functional equation $$g(xy)+g(x\sigma (y))=2g(x)+2g(y)$$ are strongly alien in the sense of Dhombres.
PubDate: 2022-12-01

• Continuous solutions of a system of composite functional equations

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Abstract: Abstract In this paper we introduce the concept of translation invariant functions: considering an arbitrary set $$\emptyset \ne S \subset {\mathbb {R}}^n$$ , the function $$F : S \longrightarrow {\mathbb {R}}$$ is translation invariant if $$F(x) = F(y)$$ implies $$F(x+t)=F(y+t)$$ for any vectors $$x,y,t \in {\mathbb {R}}^n$$ such that $$x ,y , x+t ,y+t \in S$$ . In our main results we shall consider an open, connected set $$\emptyset \ne D \subset {\mathbb {R}}^n$$ . We prove that if $$F : D \longrightarrow {\mathbb {R}}$$ is a translation invariant, continuous function, then there exists a vector $$a = (a_1, \dots , a_n) \in {\mathbb {R}}^n$$ and a strictly monotone, continuous function f such that \begin{aligned} F(x_1, \dots , x_n) = f (a_1 x_1 + \dots + a_n x_n) \end{aligned} holds for all $$(x_1, \dots , x_n) \in D \,$$ . Using this result we also show that continuous solutions $$F : D \longrightarrow {\mathbb {R}}$$ of the system of functional equations \begin{aligned} F(x_1 , \dots , x_j + t_j , \dots , x_n) = \Psi _j (F (x_1 , \dots , x_j , \dots , x_n), t_j) \ \ (j=1,\dots ,n) \end{aligned} can be represented as the composition of a strictly monotone, continuous function and a linear functional as well. Applying the latter theorem, we give a characterization of Cobb–Douglas type utility functions.
PubDate: 2022-12-01

• Characterization of affine differences and related forms

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Abstract: Abstract In the present paper we consider the problem of characterization of maps which can be expressed as an affine difference i.e. a three-place map of the form \begin{aligned} tf(x)+(1-t)f(y)-f(tx+(1-t)y). \end{aligned} We give a general solution of a functional equation associated with this problem.
PubDate: 2022-12-01

• On a polygonal mean value property

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Abstract: Abstract We give a characterization of continuous functions in a complex plane domain satisfying a weighted polygonal mean value property.
PubDate: 2022-12-01

• A new equation related to two-sided centralizers in prime rings

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Abstract: Abstract In this paper we prove the following result: Let R be a prime ring with $$char(R)\ne 2,3,5$$ and let $$T:R\rightarrow R$$ be an additive mapping satisfying the relation $$T(x^{4})=xT(x^2)x$$ for all $$x\in R$$ . In this case T is of the form $$T(x)=\lambda x$$ for all $$x\in R$$ and some fixed element $$\lambda \in C$$ , where C is the extended centroid of R.
PubDate: 2022-12-01

• The 58th International Symposium on Functional Equations Bilesdungshaus
Grillhof, Innsbruck (Austria), June 19–26, 2022 Dedicated to the memory
of János Aczél, founder of the Symposia

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PubDate: 2022-11-07
DOI: 10.1007/s00010-022-00920-3

• Graph Lipscomb’s space is a generalized Hutchinson–Barnsley
fractal

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Abstract: Abstract Being a universal space for weight $$\left A\right \ge \aleph _{0}$$ metric spaces Lipscomb’s space $$J_{A}$$ has a central role in topological dimension theory. There exists a strong connection between topological dimension theory and fractal set theory since on the one hand, some classical fractals play the role of universal spaces and on the other hand the universal space $$J_{A}$$ is a generalized Hutchinson–Barnsley fractal (i.e. the attractor of a possibly infinite iterated function system). In this paper we introduce a generalization of $$J_{A}$$ , namely the concept of graph Lipscomb’s space $$J_{A}^{{\mathcal {G}}}$$ associated with a graph $${\mathcal {G}}$$ on the set A, and we prove that its imbedded version in $$l^{2}(A^{\prime })$$ , where $$A^{\prime }=A\setminus \{z\}$$ , z being a fixed element of the set A having at least two elements, is a generalized Hutchinson–Barnsley fractal.
PubDate: 2022-10-29
DOI: 10.1007/s00010-022-00918-x

• Inequalities of Sherman type involving both $$h_1$$ -convex and $$h_2$$
-concave functions with applications

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Abstract: Abstract In this paper, we establish some inequalities involving both $$h_1$$ -convex functions and $$h_2$$ -concave functions such that $$(h_1,h_2)$$ is an increasing pair of functions. We apply the obtained results to Breckner’s s-convex functions, P-convex functions and Godunova–Levin functions. In order to unify the results, we introduce generalized s-convex functions of the second kind.
PubDate: 2022-10-18
DOI: 10.1007/s00010-022-00915-0

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