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

  First | 1 2 3 4     

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  • New fixed point theorems for sum operators in set $P_{h,e}$ and their
           applications to nonlinear fractional differential problems

         This is an Open Access Article Open Access Article

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      Authors: Lingling Zhang, Huimin Tian
      Pages: 719 - 735
      Abstract: The paper presents several new fixed point theorems for some sum operators. Without any compactness or continuity assumptions, we establish sufficient conditions for some operators to have unique fixed points and describe sequences converging to the fixed points. The main results are obtained by the cone theory and monotone iterative technique. Besides, as applications, these new fixed point theorems are used to study the existence and uniqueness of solutions for a class of nonlinear fractional differential equations.
      PubDate: 2022-04-10
      DOI: 10.12775/TMNA.2021.008
       
  • Existence and regularity of positive solutions of a degenerate fourth
           order elliptic problem

         This is an Open Access Article Open Access Article

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      Authors: Xiaohuan Wang, Jihui Zhang
      Pages: 737 - 756
      Abstract: In this paper, we consider existence and regularity of positive solutions of a degenerate fourth order elliptic problem. Firstly, a new Caffarelli-Kohn-Nirenberg type inequality for the fourth order case is established. Then, by the use of the corresponding embedding, we obtain the existence of positive solutions of a degenerate fourth order elliptic problem. Finally, the regularity of the positive solutions is also studied.
      PubDate: 2022-06-12
      DOI: 10.12775/TMNA.2021.019
       
  • A Kirchhoff type elliptic systems with exponential growth nonlinearities
         This is an Open Access Article Open Access Article

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      Authors: Xingliang Tian
      Pages: 757 - 777
      Abstract: In this paper we are interested in the existence of solutions for the following Kirchhoff type elliptic systems \begin{equation*} \begin{cases} \displaystyle -M\Bigg(\sum^m_{j=1}\ u_j\ ^2\Bigg)\Delta u_i=f_i(x,u_1,\ldots,u_m) &\mbox{in } \Omega,\\%[2mm] u_1=\ldots=u_m=0 &\mbox{on } \partial\Omega, \end{cases} \end{equation*} where $\Omega$ is a bounded domain in $\mathbb{R}^2$, $M$ is a Kirchhoff type function, $\ u_i\ ^2:=\int_\Omega \nabla u_i ^2{d}x$, $f_i$ behaves like $\exp(\beta s^2)$ when $ s \rightarrow \infty$ for some $\beta> 0$, $i=1,\ldots,m$. By variational methods with the Trudinger-Moser inequality, we obtain the existence of solutions for the above systems.
      PubDate: 2022-03-13
      DOI: 10.12775/TMNA.2021.035
       
  • Semiclassical states for Schrödinger-Poisson system with Hartree-type
           nonlinearity

         This is an Open Access Article Open Access Article

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      Authors: Li Cai, Fubao Zhang
      Pages: 779 - 817
      Abstract: In this paper we are interested in a class of semiclassical Schrödinger-Poisson system with Hartree-type nonlinearity. Firstly, we prove the existence of groundstate for autonomous system by using the subcritical approximation and the Pohozaev constraint method. Secondly, we prove the existence of semiclassical state solutions and multiplicity for system with critical frequency by using the genus. Finally, we study multiplicity and concentration behavior for solutions of system with general potential by using the Lusternik-Schnirelman theory.
      PubDate: 2022-03-13
      DOI: 10.12775/TMNA.2021.036
       
  • On the Choquard equations under the effect of a general nonlinear term
         This is an Open Access Article Open Access Article

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      Authors: Jiu Liu, Jia-Feng Liao, Hui-Lan Pan, Chun-Lei Tang
      Pages: 819 - 832
      Abstract: We investigate the existence and properties of ground state solutions for a class of nonlinear Choquard equations. Proofs are mainly based on the variational method.
      PubDate: 2022-03-13
      DOI: 10.12775/TMNA.2021.037
       
  • Fixed point theorem for generic 2-generalized hybrid mappings in Hilbert
           spaces

         This is an Open Access Article Open Access Article

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      Authors: Atsumasa Kondo
      Pages: 833 - 849
      Abstract: We establish a fixed point theorem for a class of mappings called generic 2-generalized hybrid mappings in the setting of a real Hilbert space. Two examples of that class of mappings are presented herein. The mappings are not quasi-nonexpansive even though they have fixed points. One of these maps is even not continuous. The fixed point theorem proved in this article improves many previous works in the literature.
      PubDate: 2022-06-12
      DOI: 10.12775/TMNA.2021.038
       
  • Analytical and computational results for the decay of solutions of a
           damped wave equation with variable-exponent nonlinearities

         This is an Open Access Article Open Access Article

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      Authors: Salim A. Messaoudi, Mostafa Zahri
      Pages: 851 - 866
      Abstract: With the advancement of science and technology, many physical and engineering models require more sophisticated mathematical functional spaces to be studied and well understood. For example, in fluid dynamics, electrorheological fluids (smart fluids) have the property that the viscosity changes (often drastically) when exposed to an electrical field. The Lebesgue and Sobolev spaces with variable exponents proved to be efficient tools to study such problems as well as other models like the image processing. In this work, we consider the following nonlinear wave equation with variable exponents: \[ u_{tt}-\Delta u-\Delta u_{t}+ u_{t} ^{m(\cdot)-2}u_{t}=0, \quad \text{in }\Omega \times (0,T), \] where $\Omega $ is a bounded domain and $T> 0$, and show that weak solutions decay exponentially or polynomially depending on the range of the variable exponent $m$. We also give two numerical examples to illustrate our theoretical results.
      PubDate: 2022-06-12
      DOI: 10.12775/TMNA.2021.039
       
  • Topological entropy of diagonal maps on inverse limit spaces
         This is an Open Access Article Open Access Article

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      Authors: Ana Anušić, Christopher Mouron
      Pages: 867 - 895
      Abstract: We give an upper bound for the topological entropy of maps on inverse limit spaces in terms of their set-valued components. In a special case of a diagonal map on the inverse limit space $\underleftarrow{\lim}(I,f)$, where every diagonal component is the same map $g\colon I\to I$ which strongly commutes with $f$ (i.e.\ $f^{-1}\circ g=g\circ f^{-1}$), we show that the entropy equals $\max\{\mbox{\rm Ent}(f),\mbox{\rm Ent}(g)\}$. As a side product, we develop some techniques for computing topological entropy of set-valued maps.
      PubDate: 2022-06-12
      DOI: 10.12775/TMNA.2021.043
       
  • On Reeb graphs induced from smooth functions on 3-dimensional closed
           manifolds with finitely many singular values

         This is an Open Access Article Open Access Article

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      Authors: Naoki Kitazawa
      Pages: 897 - 912
      Abstract: The {\it Reeb graph} of a smooth function on a smooth manifold is the graph obtained as the space of all connected components of preimages (level sets) such that the set of all vertices coincides with the set of all the connected components of preimages containing some singular points. Reeb graphs are fundamental and important tools in algebraic topological and differential topological theory of Morse functions and their variants. In the present paper, as a related fundamental and important study, for given graphs, we construct certain smooth functions inducing the graphs as the Reeb graphs. Such results have been demonstrated by Masumoto, Michalak, Saeki, Sharko, among others, and also by the author since 2000s. We construct good smooth functions on suitable $3$-dimensional connected, closed and orientable manifolds.
      PubDate: 2022-06-12
      DOI: 10.12775/TMNA.2021.044
       
  • Existence and multiplicity of sign-changing solutions for a
           Schrödinger-Bopp-Podolsky system

         This is an Open Access Article Open Access Article

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      Authors: Lixiong Wang, Haibo Chen, Senli Liu
      Pages: 913 - 940
      Abstract: In this paper, we deal with the following Schrödinger-Bopp-Podolsky system: \begin{equation}\label{P1} \begin{cases} -\Delta u+u+\phi u=f(u), \\ -\Delta\phi +\varepsilon^{2}\Delta^{2}\phi =4\pi u^{2}, \end{cases} \tag{$\rom{P}_{\varepsilon}$} \quad \hbox{in }\mathbb{R}^{3}, \end{equation} where $\varepsilon> 0$ and $f$ is a continuous, superlinear and subcritical nonlinearity. By using a perturbation approach and the method of invariant sets of descending flow incorporated with minimax arguments, we prove the existence and multiplicity of sign-changing solutions of syste (P1). Moreover, the asymptotic behavior of sign-changing solutions is also established. Our results mainly extend the results in Liu, Wang and Zhang ([Liuzhaoli2016AMPA], Ann. Mat. Pura Appl. 2016).
      PubDate: 2022-06-12
      DOI: 10.12775/TMNA.2021.045
       
  • A measure differential inclusion with time-dependent maximal monotone
           operators

         This is an Open Access Article Open Access Article

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      Authors: Dalila Azzam-Laouir
      Pages: 941 - 956
      Abstract: In this paper we establish the existence and uniqueness result of right continuous bounded variation solution for a perturbed differential inclusion governed by time-dependent maximal monotone operators.
      PubDate: 2022-06-12
      DOI: 10.12775/TMNA.2021.046
       
  • Nontrivial solutions for a class of gradient-type quasilinear elliptic
           systems

         This is an Open Access Article Open Access Article

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      Authors: Anna Maria Candela, Caterina Sportelli
      Pages: 957 - 986
      Abstract: The aim of this paper is to investigate the existence of weak bounded solutions of the gradient-type quasilinear elliptic system \begin{equation}\label{aP}\tag{P} \begin{cases} - {\rm div} ( a_i(x, u_i, \nabla u_i) ) + A_{i, t} (x, u_i, \nabla u_i) = G_i(x, \bu) \hidewidth \\ &\hskip3cm \hbox{in $\Omega$ for $i\in\{1,\dots,m\}$,}\\ \bu = 0 &\hskip 3cm \hbox{on $\partial\Omega$,} \end{cases} \end{equation} with $m\geq 2$ and $\bu=(u_1,\dots, u_{m})$, where $\Omega\subset{\mathbb R}^N$ is an open bounded domain and some functions $A_i\colon \Omega\times{\mathbb R}\times{\mathbb R}^N\rightarrow{\mathbb R}$, $i\in\{1,\dots,m\}$, and $G\colon \Omega\times{\mathbb R}^m\rightarrow{\mathbb R}$ exist such that $a_i(x,t,\xi) = \nabla_{\xi} A_i(x,t,\xi)$, $A_{i, t} (x,t,\xi) = \frac{\partial A_i}{\partial t} (x,t,\xi)$, and $G_{i}(x,\bu) = \frac{\partial G}{\partial u_i}(x,\bu)$. We prove that, under suitable hypotheses, the functional ${\mathcal J}$ related to problem (P) is $\mathcal{C}^1$ on a ``good'' Banach space $X$ and satisfies the weak Cerami-Palais-Smale condition. Then, generalized versions of the Mountain Pass Theorems allow us to prove the existence of at least one critical point and, if additionally ${\mathcal J}$ is even, of infinitely many critical points.
      PubDate: 2022-06-12
      DOI: 10.12775/TMNA.2021.047
       
  • A non-linear stable non-Gaussian process in fractional time
         This is an Open Access Article Open Access Article

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      Authors: Soveny Solís, Vicente Vergara
      Pages: 987 - 1028
      Abstract: A subdiffusion problem in which the diffusion term is related to a stable stochastic process is introduced. Linear models of these systems have been studied in a general way, but non-linear models require a more specific analysis. The model presented in this work corresponds to a non-linear evolution equation with fractional time derivative and a pseudo-differential operator acting on the spatial variable. This type of equations has a couple of fundamental solutions, whose estimates for the $L_p$-norm are found to obtain three main results concerning mild and global solutions. The existence and uniqueness of a mild solution is based on the conditions required in some parameters, one of which is the order of stability of the stochastic process. The existence and uniqueness of a global solution is found for the case of small initial conditions and another for non-negative initial conditions. The relationship between the Fourier analysis and Markov processes, together with the theory of fixed points in Banach spaces, is particularly exploited. In addition, the present work includes the asymptotic behavior of global solutions as a linear combination of the fundamental solutions with $L_p$-decay.
      PubDate: 2022-06-12
      DOI: 10.12775/TMNA.2021.048
       
  • Equilibrium under uncertainty with fuzzy payoff
         This is an Open Access Article Open Access Article

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      Authors: Taras Radul
      Pages: 1029 - 1045
      Abstract: We study $n$-player games where players form non-additive beliefs about opponent's decisions and answer with pure strategies. The concept of an equilibrium under uncertainty was introduced by J. Dow and S. Werlang (1994) for two players and was extended to $n$-player games by J. Eichberger and D. Kelsey (2000). The authors consider payoff functions expressed by Choquet integral. The concept of an equilibrium under uncertainty with payoff functions expressed by the Sugeno integral were considered by T. Radul (2018). We consider a generalization of this result with payoff functions expressed by fuzzy integral generated by arbitrary continuous $t$-norm.
      PubDate: 2022-04-10
      DOI: 10.12775/TMNA.2021.049
       
  • Fixed point theorems of various nonexpansive actions of semitopological
           semigroups on weakly/weak* compact convex sets

         This is an Open Access Article Open Access Article

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      Authors: Bui Ngoc Muoi, Ngai-Ching Wong
      Pages: 1047 - 1067
      Abstract: Let $S$ be a right reversible semitopological semigroup, and let $\operatorname{LUC}(S)$ be the space of left uniformly continuous functions on $S$. Suppose that $\operatorname{LUC}(S)$ has a left invariant mean. Let $K$ be a weakly compact convex subset of a Banach space not necessarily with normal structure. We show that there always exists a common fixed point for any jointly weakly continuous and super asymptotically nonexpansive action of $S$ on $K$. Several variances involving the weak* compactness, the RNP, the distality of $K$ and/or the left reversibility of $S$ are also provided.
      PubDate: 2022-06-12
      DOI: 10.12775/TMNA.2021.050
       
  • Pohožaev-type ground state solutions for Choquard equation with singular
           potential and critical exponent

         This is an Open Access Article Open Access Article

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      Authors: Senli Liu, Haibo Chen
      Pages: 1069 - 1090
      Abstract: In this paper, we are concerned with the existence of Pohožaev-type ground state solutions for the Choquard equation with a singular potential and a critical exponent. By virtue of a generalized version of the Lions-type theorem and the Pohožaev manifold, we obtain the existence of a Pohožaev-type ground state solution for the above problem. Some recent results from the literature are improved and extended.
      PubDate: 2022-06-12
      DOI: 10.12775/TMNA.2021.052
       
 
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