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     Open Access   (Followers: 4)
Abhandlungen aus dem Mathematischen Seminar der Universitat Hamburg     Hybrid Journal   (Followers: 2)
Accounting Perspectives     Full-text available via subscription   (Followers: 4)
ACM Transactions on Algorithms (TALG)     Hybrid Journal   (Followers: 13)
ACM Transactions on Computational Logic (TOCL)     Hybrid Journal   (Followers: 5)
ACM Transactions on Mathematical Software (TOMS)     Hybrid Journal   (Followers: 6)
ACS Applied Materials & Interfaces     Hybrid Journal   (Followers: 43)
Acta Applicandae Mathematicae     Hybrid Journal   (Followers: 2)
Acta Mathematica Hungarica     Hybrid Journal   (Followers: 3)
Acta Mathematica Sinica, English Series     Hybrid Journal   (Followers: 5)
Acta Mathematica Vietnamica     Hybrid Journal  
Acta Mathematicae Applicatae Sinica, English Series     Hybrid Journal  
Advanced Science Letters     Full-text available via subscription   (Followers: 9)
Advances in Applied Clifford Algebras     Hybrid Journal   (Followers: 6)
Advances in Catalysis     Full-text available via subscription   (Followers: 7)
Advances in Complex Systems     Hybrid Journal   (Followers: 10)
Advances in Computational Mathematics     Hybrid Journal   (Followers: 16)
Advances in Decision Sciences     Open Access   (Followers: 4)
Advances in Difference Equations     Open Access   (Followers: 3)
Advances in Fixed Point Theory     Open Access  
Advances in Geosciences (ADGEO)     Open Access   (Followers: 20)
Advances in Linear Algebra & Matrix Theory     Open Access   (Followers: 6)
Advances in Materials Science     Open Access   (Followers: 21)
Advances in Mathematical Physics     Open Access   (Followers: 6)
Advances in Mathematics     Full-text available via subscription   (Followers: 18)
Advances in Numerical Analysis     Open Access   (Followers: 4)
Advances in Operations Research     Open Access   (Followers: 13)
Advances in Operator Theory     Hybrid Journal  
Advances in Pure Mathematics     Open Access   (Followers: 10)
Advances in Science and Research (ASR)     Open Access   (Followers: 9)
Aequationes Mathematicae     Hybrid Journal   (Followers: 2)
African Journal of Educational Studies in Mathematics and Sciences     Full-text available via subscription   (Followers: 8)
African Journal of Mathematics and Computer Science Research     Open Access   (Followers: 5)
Afrika Matematika     Hybrid Journal   (Followers: 2)
Air, Soil & Water Research     Open Access   (Followers: 6)
AKSIOMATIK : Jurnal Penelitian Pendidikan dan Pembelajaran Matematika     Open Access  
Al-Jabar : Jurnal Pendidikan Matematika     Open Access  
Al-Qadisiyah Journal for Computer Science and Mathematics     Open Access   (Followers: 3)
AL-Rafidain Journal of Computer Sciences and Mathematics     Open Access   (Followers: 4)
Algebra and Logic     Hybrid Journal   (Followers: 9)
Algebra Colloquium     Hybrid Journal   (Followers: 3)
Algebra Universalis     Hybrid Journal   (Followers: 3)
Algorithmic Operations Research     Open Access   (Followers: 6)
Algorithms     Open Access   (Followers: 14)
Algorithms Research     Open Access   (Followers: 1)
American Journal of Computational and Applied Mathematics     Open Access   (Followers: 4)
American Journal of Mathematical Analysis     Open Access   (Followers: 1)
American Journal of Mathematical and Management Sciences     Hybrid Journal  
American Journal of Mathematics     Full-text available via subscription   (Followers: 7)
American Journal of Operations Research     Open Access   (Followers: 6)
American Mathematical Monthly     Full-text available via subscription   (Followers: 3)
An International Journal of Optimization and Control: Theories & Applications     Open Access   (Followers: 12)
Analele Universitatii Ovidius Constanta - Seria Matematica     Open Access  
Analysis and Applications     Hybrid Journal   (Followers: 2)
Analysis and Mathematical Physics     Hybrid Journal   (Followers: 7)
Anargya : Jurnal Ilmiah Pendidikan Matematika     Open Access  
Annales Mathematicae Silesianae     Open Access  
Annales mathématiques du Québec     Hybrid Journal   (Followers: 3)
Annales Universitatis Mariae Curie-Sklodowska, sectio A – Mathematica     Open Access   (Followers: 1)
Annales Universitatis Paedagogicae Cracoviensis. Studia Mathematica     Open Access  
Annali di Matematica Pura ed Applicata     Hybrid Journal   (Followers: 1)
Annals of Combinatorics     Hybrid Journal   (Followers: 3)
Annals of Data Science     Hybrid Journal   (Followers: 15)
Annals of Functional Analysis     Hybrid Journal   (Followers: 2)
Annals of Mathematics     Full-text available via subscription   (Followers: 5)
Annals of Mathematics and Artificial Intelligence     Hybrid Journal   (Followers: 13)
Annals of PDE     Hybrid Journal  
Annals of Pure and Applied Logic     Open Access   (Followers: 5)
Annals of the Alexandru Ioan Cuza University - Mathematics     Open Access   (Followers: 1)
Annals of the Institute of Statistical Mathematics     Hybrid Journal   (Followers: 1)
Annals of West University of Timisoara - Mathematics     Open Access   (Followers: 1)
Annals of West University of Timisoara - Mathematics and Computer Science     Open Access   (Followers: 2)
Annuaire du Collège de France     Open Access   (Followers: 6)
ANZIAM Journal     Open Access   (Followers: 1)
Applicable Algebra in Engineering, Communication and Computing     Hybrid Journal   (Followers: 3)
Applications of Mathematics     Hybrid Journal   (Followers: 3)
Applied Categorical Structures     Hybrid Journal   (Followers: 5)
Applied Computational Intelligence and Soft Computing     Open Access   (Followers: 16)
Applied Mathematics     Open Access   (Followers: 6)
Applied Mathematics     Open Access   (Followers: 6)
Applied Mathematics & Optimization     Hybrid Journal   (Followers: 7)
Applied Mathematics - A Journal of Chinese Universities     Hybrid Journal   (Followers: 1)
Applied Mathematics and Nonlinear Sciences     Open Access   (Followers: 1)
Applied Mathematics Letters     Full-text available via subscription   (Followers: 3)
Applied Mathematics Research eXpress     Hybrid Journal   (Followers: 1)
Applied Network Science     Open Access   (Followers: 3)
Applied Numerical Mathematics     Hybrid Journal   (Followers: 4)
Applied Spatial Analysis and Policy     Hybrid Journal   (Followers: 5)
Arab Journal of Mathematical Sciences     Open Access   (Followers: 3)
Arabian Journal of Mathematics     Open Access   (Followers: 1)
Archive for Mathematical Logic     Hybrid Journal   (Followers: 3)
Archive of Applied Mechanics     Hybrid Journal   (Followers: 4)
Archive of Numerical Software     Open Access  
Archives of Computational Methods in Engineering     Hybrid Journal   (Followers: 5)
Armenian Journal of Mathematics     Open Access  
Arnold Mathematical Journal     Hybrid Journal   (Followers: 1)
Artificial Satellites     Open Access   (Followers: 21)
Asia-Pacific Journal of Operational Research     Hybrid Journal   (Followers: 3)
Asian Journal of Algebra     Open Access   (Followers: 1)
Asian Research Journal of Mathematics     Open Access  
Asian-European Journal of Mathematics     Hybrid Journal   (Followers: 2)
Australian Mathematics Teacher, The     Full-text available via subscription   (Followers: 7)
Australian Primary Mathematics Classroom     Full-text available via subscription   (Followers: 5)
Australian Senior Mathematics Journal     Full-text available via subscription   (Followers: 1)
Automatic Documentation and Mathematical Linguistics     Hybrid Journal   (Followers: 5)
Axioms     Open Access   (Followers: 1)
Baltic International Yearbook of Cognition, Logic and Communication     Open Access   (Followers: 2)
Banach Journal of Mathematical Analysis     Hybrid Journal  
Basin Research     Hybrid Journal   (Followers: 6)
BIBECHANA     Open Access  
Biomath     Open Access  
BIT Numerical Mathematics     Hybrid Journal  
Boletim Cearense de Educação e História da Matemática     Open Access  
Boletim de Educação Matemática     Open Access  
Boletín de la Sociedad Matemática Mexicana     Hybrid Journal  
Bollettino dell'Unione Matematica Italiana     Full-text available via subscription  
British Journal for the History of Mathematics     Hybrid Journal   (Followers: 2)
British Journal of Mathematical and Statistical Psychology     Full-text available via subscription   (Followers: 18)
British Journal of Mathematics & Computer Science     Full-text available via subscription   (Followers: 1)
Buletinul Academiei de Stiinte a Republicii Moldova. Matematica     Open Access   (Followers: 2)
Bulletin des Sciences Mathamatiques     Full-text available via subscription   (Followers: 3)
Bulletin of Dnipropetrovsk University. Series : Communications in Mathematical Modeling and Differential Equations Theory     Open Access   (Followers: 3)
Bulletin of Mathematical Sciences     Open Access   (Followers: 1)
Bulletin of Symbolic Logic     Full-text available via subscription   (Followers: 4)
Bulletin of Taras Shevchenko National University of Kyiv. Series: Physics and Mathematics     Open Access  
Bulletin of the Australian Mathematical Society     Full-text available via subscription   (Followers: 2)
Bulletin of the Brazilian Mathematical Society, New Series     Hybrid Journal  
Bulletin of the Iranian Mathematical Society     Hybrid Journal  
Bulletin of the London Mathematical Society     Hybrid Journal   (Followers: 3)
Bulletin of the Malaysian Mathematical Sciences Society     Hybrid Journal  
Cadernos do IME : Série Matemática     Open Access  
Calculus of Variations and Partial Differential Equations     Hybrid Journal   (Followers: 1)
Canadian Journal of Mathematics / Journal canadien de mathématiques     Hybrid Journal  
Canadian Journal of Science, Mathematics and Technology Education     Hybrid Journal   (Followers: 20)
Canadian Mathematical Bulletin     Hybrid Journal  
Carpathian Mathematical Publications     Open Access  
Catalysis in Industry     Hybrid Journal  
CAUCHY     Open Access   (Followers: 1)
CEAS Space Journal     Hybrid Journal   (Followers: 5)
CHANCE     Hybrid Journal   (Followers: 5)
Chaos, Solitons & Fractals     Hybrid Journal   (Followers: 1)
Chaos, Solitons & Fractals : X     Open Access   (Followers: 1)
ChemSusChem     Hybrid Journal   (Followers: 8)
Chinese Annals of Mathematics, Series B     Hybrid Journal  
Chinese Journal of Catalysis     Full-text available via subscription   (Followers: 2)
Chinese Journal of Mathematics     Open Access  
Ciencia     Open Access  
CODEE Journal     Open Access  
Cogent Mathematics     Open Access   (Followers: 2)
Cognitive Computation     Hybrid Journal   (Followers: 3)
Collectanea Mathematica     Hybrid Journal  
College Mathematics Journal     Hybrid Journal   (Followers: 3)
COMBINATORICA     Hybrid Journal  
Combinatorics, Probability and Computing     Hybrid Journal   (Followers: 5)
Combustion Theory and Modelling     Hybrid Journal   (Followers: 20)
Commentarii Mathematici Helvetici     Hybrid Journal   (Followers: 1)
Communications in Combinatorics and Optimization     Open Access  
Communications in Contemporary Mathematics     Hybrid Journal  
Communications in Mathematical Physics     Hybrid Journal   (Followers: 3)
Communications On Pure & Applied Mathematics     Hybrid Journal   (Followers: 6)
Complex Analysis and its Synergies     Open Access   (Followers: 1)
Complex Variables and Elliptic Equations: An International Journal     Hybrid Journal  
Compositio Mathematica     Full-text available via subscription   (Followers: 2)
Comptes Rendus : Mathematique     Open Access  
Computational and Applied Mathematics     Hybrid Journal   (Followers: 3)
Computational and Mathematical Methods     Hybrid Journal  
Computational and Mathematical Methods in Medicine     Open Access   (Followers: 2)
Computational and Mathematical Organization Theory     Hybrid Journal   (Followers: 2)
Computational Complexity     Hybrid Journal   (Followers: 5)
Computational Mathematics and Modeling     Hybrid Journal   (Followers: 8)
Computational Mechanics     Hybrid Journal   (Followers: 11)
Computational Methods and Function Theory     Hybrid Journal  
Computational Optimization and Applications     Hybrid Journal   (Followers: 9)
Computers & Mathematics with Applications     Full-text available via subscription   (Followers: 10)
Confluentes Mathematici     Hybrid Journal  
Constructive Mathematical Analysis     Open Access  
Contributions to Discrete Mathematics     Open Access  
Contributions to Game Theory and Management     Open Access  
COSMOS     Hybrid Journal   (Followers: 1)
Cross Section     Full-text available via subscription   (Followers: 1)
Cryptography and Communications     Hybrid Journal   (Followers: 11)
Cuadernos de Investigación y Formación en Educación Matemática     Open Access  
Cubo. A Mathematical Journal     Open Access  
Current Research in Biostatistics     Open Access   (Followers: 8)
Czechoslovak Mathematical Journal     Hybrid Journal  
Daya Matematis : Jurnal Inovasi Pendidikan Matematika     Open Access  
Demographic Research     Open Access   (Followers: 14)
Design Journal : An International Journal for All Aspects of Design     Hybrid Journal   (Followers: 35)
Desimal : Jurnal Matematika     Open Access  
Dhaka University Journal of Science     Open Access  
Differential Equations and Dynamical Systems     Hybrid Journal   (Followers: 2)
Differentsial'nye Uravneniya     Open Access  
Digital Experiences in Mathematics Education     Hybrid Journal   (Followers: 3)
Discrete Mathematics     Hybrid Journal   (Followers: 7)
Discrete Mathematics & Theoretical Computer Science     Open Access   (Followers: 1)
Discrete Mathematics, Algorithms and Applications     Hybrid Journal   (Followers: 2)
Discussiones Mathematicae - General Algebra and Applications     Open Access  
Discussiones Mathematicae Graph Theory     Open Access   (Followers: 1)
Diskretnaya Matematika     Full-text available via subscription  
Doklady Akademii Nauk     Open Access  

        1 2 3 4 | Last

Similar Journals
Journal Cover
Acta Applicandae Mathematicae
Journal Prestige (SJR): 0.675
Citation Impact (citeScore): 1
Number of Followers: 2  
 
  Hybrid Journal Hybrid journal (It can contain Open Access articles)
ISSN (Print) 0167-8019 - ISSN (Online) 1572-9036
Published by Springer-Verlag Homepage  [2467 journals]
  • Global Well-Posedness of Second-Grade Fluid Equations in 2D Exterior
           Domain

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      Abstract: Abstract In this article, we consider the second-grade fluid equations in 2D exterior domain \(\Omega \) with homogeneous Dirichlet boundary conditions. For initial data \(\boldsymbol{u}_{0} \in \boldsymbol{H}^{3}(\Omega )\) , the second-grade fluid equations is shown to be globally well-posed. Furthermore, for arbitrary \(T > 0\) and \(s \geq 3\) , we prove that the solution belongs to \(L^{\infty}([0, T]; \boldsymbol{H}^{s}(\Omega ))\) provided that \(\boldsymbol{u}_{0}\) is in \(\boldsymbol{H}^{s}(\Omega )\) .
      PubDate: 2022-11-30
       
  • Analiticity of the Type III Thermoelastic Euler Bernoulli Model with Tip

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      Abstract: Abstract We consider the thermoelastic model following the type III theory for the Euler Bernoulli beam equation with tip. We prove that the corresponding semigroup is analytic. In particular, this implies: the smoothing effect over the initial data, the exponential stability of the semigroup and that the rate of decay of the semigroup is equal to the spectral bound of its generator (linear stability property).
      PubDate: 2022-11-29
       
  • On the Ginzburg–Landau Free Energy Density of Superfluid A and B
           Phases of Helium 3

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      Abstract: Abstract In the \(p\) -wave spin-triplet pairing model of superfluid Helium-3, at each point \(x\) of the region \(\Omega \) occupied by the system, the order parameter field is described by a \(3\times 3\) complex matrix \(A\) encoding the orientation of the spin and orbital angular momentum of the Cooper pairs of Helium-3 atoms. The transition of liquid Helium-3 to a superfluid state is associated with a spontaneous breaking of the overall symmetry group \({\mathcal {G}}= SO(3) \times SO(3) \times U(1)\) of the system. In the Ginzburg–Landau regime (i.e., in regions near to the critical phase-transition temperature), the free-energy density \(f\) of superfluid Helium-3 is expanded into powers of the components \(A_{\mu j}\) of \(A\) and \(A_{\mu j, k}\) of its gradient \(\nabla A\) , and can be decomposed in the sum \(f(A, \nabla A) = f_{B}(A) + f_{\mathop{\mathrm{grad}}\nolimits }(A, \nabla A)\) of the bulk part, \(f_{B}\) , and the gradient part, \(f_{\mathop{\mathrm{grad}}\nolimits }\) . The free-energy density \(f\) must be invariant under the action of \({\mathcal {G}}\) defined by \(A \mapsto A' = \exp (i\phi ) R_{1}AR_{2}^{T}\) , where \(\phi \) is a phase, and \(R_{1}\) , \(R_{2}\) are elements of \(SO(3)\) , that is, it must be invariant against gauge transformations and against rotations in spin space and ordinary (orbital) space, separately. We address the question of \({\mathcal {G}}\) -invariance for a general free-energy density in the Ginzburg–Landau energy functional and determine all linearly independent quartic terms of the form \(AA^{*}\nabla A (\nabla A)^{*}\) in the expansion of the gradient free-energy density. It is known that the superfluid phases of Helium-3 near the critical temperature correspond to the minima of the bulk free energy and that the absolute minimum corresponds to a stable equilibrium phase. In zero magnetic field, there are two distinct superfluid phases, A and B, which exhibit an absolute minimum of the bulk free energy in different regions of the phase diagram. Explicit expressions for the generalized gradient energy densities are provided for both the A and B phases. Finally, a unified approach to A and B phases is proposed, which involves an auxiliary control parameter. In this framework, the extremal properties of A and B phases are recovered and a transition between the two phases is observed in dependence of pressure.
      PubDate: 2022-11-23
       
  • Perturbation Theorems for Regular Sampling in Wavelet Subspaces

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      Abstract: Abstract A perturbation theorem for regular sampling in the Paley-Wiener space, also known as the Kadec \(1/4\) -theorem, states that if \(\{x_{k}:k\in \mathbb{Z}\}\) is a sequence of real numbers for which \(L=\sup _{k\in \mathbb{Z}} x_{k}-k <1/4\) , then any entire function \(f\in L^{2}(\mathbb{R})\) of exponential type at most \(\pi \) can be recovered from its samples \(\{f(x_{k}):k\in \mathbb{Z}\}\) . Kadec-type theorems for irregular sampling in wavelet subspaces have been discussed in several papers. However, the optimal value of \(L\) is found only in the Franklin spline wavelet subspace. This paper aims to find a better bound for \(L\) in the Kadec-type theorem for wavelet subspaces along with sampling bounds.
      PubDate: 2022-11-23
       
  • Existence and Uniqueness of Local Weak Solution of D-Dimensional
           Fractional Micropolar Rayleigh-Bénard Convection System Without Thermal
           Diffusion in Besov Space

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      Abstract: Abstract This paper studies the existence and uniqueness of local weak solutions to the d-dimensional ( \(d\ge 2\) ) fractional micropolar Rayleigh-Bénard convection system without thermal diffusion. When the fractional dissipation index \(1\leq \alpha <1+\frac{d}{4}\) , any initial data \((u_{0},\omega _{0})\in B_{2,1}^{1+\frac{d}{2}-2\alpha}(\mathbb{R}^{d})\) and \(\theta _{0}\in B_{2,1}^{1+\frac{d}{2}-\alpha}(\mathbb{R}^{d})\) yield a local unique weak solution.
      PubDate: 2022-11-21
       
  • Z-Eigenvalue Intervals of Even-Order Tensors with Application to Judge the
           Strong Ellipticity of an Elasticity Tensor

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      Abstract: Abstract Existing literature shows that the strong ellipticity of an elasticity tensor can be equivalently transformed into the positive definiteness of even-order symmetric tensors constructed from the components of this elasticity tensor, and that an even-order symmetric tensor is positive definite if and only if all of its Z-eigenvalues are positive. In order to judge the strong ellipticity of an elasticity tensor, we first construct a Z-eigenvalue inclusion interval with parameters for an even-order symmetric tensor, and then by finding the optimal value of parameters we derive the optimal parameter interval, which is used to obtain a sufficient condition for the positive definiteness of the even-order symmetric tensor. Additionally, we prove that the new interval and sufficient condition are preferable than some existing ones. Finally, by using the positive definiteness of even-order symmetric tensors, we derived a necessary and sufficient condition and a checkable criterion for the strong ellipticity of an elasticity tensor.
      PubDate: 2022-11-16
       
  • The Nehari Manifold Approach Involving a Singular p(x)-Biharmonic Problem
           with Navier Boundary Conditions

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      Abstract: Abstract Using variational tools combined with Nehari manifold approach, we discuss in this paper, the existence of solutions for a class of singular \(p(x)\) -biharmonic Laplacian problem with Navier boundary conditions. Precisely, we prove the existence of at least two nonnegative solutions for the given problem.
      PubDate: 2022-11-07
       
  • Detecting Affine Equivalences Between Implicit Planar Algebraic Curves

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      Abstract: Abstract We present a complete algorithm for computing the affine equivalences between two implicit planar algebraic curves. We provide evidence of the efficiency of the algorithm, implemented in Maple, and compare its performance with existing algorithms. As a part of the process for developing the algorithm, we characterize planar algebraic curves, possibly singular, possibly reducible, invariant under infinitely many affine equivalences.
      PubDate: 2022-11-07
       
  • A Hunter-Gatherer–Farmer Population Model: New Conditional Symmetries
           and Exact Solutions with Biological Interpretation

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      Abstract: Abstract New \(Q\) -conditional (nonclassical) symmetries and exact solutions of the hunter-gatherer–farmer population model proposed by Aoki et al. (Theor. Popul. Biol. 50, 1–17 (1996)) are constructed. The main method used for the aforementioned purposes is an extension of the nonclassical method for system of partial differential equations. An analysis of properties of the exact solutions obtained and their biological interpretation are carried out. New results are compared with those derived in recent studies devoted to the same model.
      PubDate: 2022-11-07
       
  • The Generalized Hartree Equation with a Combined Source Term

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      Abstract: Abstract This paper investigates the perturbed Hartree equation $$ i\dot{u}+\Delta u \pm u ^{2(p-1)}u\pm (I_{\alpha}* u ^{q}) u ^{q-2}u=0.$$ Indeed, one addresses the questions of global well-posedness and scattering versus finite time blow-up of energy solutions. One needs to deal with the absence of scaling invariance and try to understand the concurrency between a local and non-local source terms. The global existence and scattering of energy critical solutions for small data are proved regardless the sign of the source terms. In the case of two attractive non-linearity, the scattering of global solutions is proved in the inter-critical regime. Moreover, a decay result in available in the mass-sub-critical case. When there is an attractive part and a repulsive part in the source term, one gives a dichotomy of global existence versus finite time blow-up of solutions and the strong instability of standing waves, depending on a comparison between the exponents \(p\) and \(q\) .
      PubDate: 2022-10-19
       
  • Multi-Component Coupled Fokas-Lenells Equations and Theirs Localized Wave
           Solutions

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      Abstract: Abstract As the first negative flow of the integrable generalization of the nonlinear Schrödinger equation, the Fokas-Lenells equation has attracted extensive attention in recent years. In this paper, we derive the general structure of the multi-component coupled Fokas-Lenells equations which have Lax representation in matrix form. Then we construct a basic theory of the general form of Lax pairs and Darboux transformations (classical and generalized) for the previously mentioned equation. As applications, we study two examples in detail, both of the four-component and the three-component coupled Fokas-Lenells equations can be reduced to the ubiquitous Fokas-Lenells equation. Furthermore, we apply the basic theory to obtain kinds of localized wave solutions, that is to say we use the classical Darboux transformation to obtain soliton solutions and use the generalized Darboux transformation to obtain soliton-positon solutions, rogue wave solutions and breather solutions. At last these localized wave solutions are illustrated by three-dimensional structure plots and two-dimensional density plots, as well as their dynamic properties are discussed.
      PubDate: 2022-10-14
       
  • An Inverse Source Problem for Anomalous Diffusion Equation with
           Generalized Fractional Derivative in Time

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      Abstract: Abstract The inverse problem of recovering a source term along with diffusion concentration for a generalized diffusion equation has been considered. The so-called 2nd level fractional derivative in time of order between 0 and 1 is used by fixing the parameters involved in 2nd level fractional derivative some well known fractional derivatives such as Riemann-Liouville, Caputo and Hilfer can be obtained. We investigated existence, uniqueness results and discussed some particular cases of the considered inverse problem.
      PubDate: 2022-10-11
       
  • Study on the Biological Correlation of a Diffusive Food Web Model with
           Application

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      Abstract: Abstract Predators possess individual feeding behaviour in their territory. Mostly they attack prey according to their convenience and availability. Sometimes the predator predates upon more than one trophic level for survival. Also, the species go through self-interaction to acquire resources, habitats, food, mates, etc. In this study, we take a food web model consisting of basal prey, intermediate predator, and omnivorous as a top predator. We assume logistic growth for prey and intermediate predator. Here, the prey and the intermediate predator interaction is incorporated by the linear functional response, and other species interactions are followed by Holling Type II. We have studied the temporal as well as the spatio-temporal dynamics of this model. Turing instability conditions are also investigated. We generalize the effect of the diffusion coefficient on the spatial system. Higher-order stability analysis is explained with stability and instability criteria. Numerical verifications with the help of phase portraits, bifurcation, and Turing patterns are presented to illustrate the system’s dynamical behaviour and correlate with the applicability in the real world. We have implicated our model in the agricultural for omnivore carabid species to understand the consequence of their intraspecific interaction as well as trophic interactions. Also, we have validated this correlation with our model dynamics.
      PubDate: 2022-10-11
       
  • Existence of Global-in-Time Solutions to a System of Fully Nonlinear
           Parabolic Equations

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      Abstract: Abstract We consider the Cauchy problem for a system of fully nonlinear parabolic equations. In this paper, we shall show the existence of global-in-time solutions to the problem. Our condition to ensure the global existence is specific to the fully nonlinear parabolic system.
      PubDate: 2022-10-04
       
  • A Note on Asymptotics Between Singular and Constrained Control Problems of
           One-Dimensional Diffusions

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      Abstract: Abstract We study the asymptotic relations between certain singular and constrained control problems for one-dimensional diffusions with both discounted and ergodic objectives. In the constrained control problems the controlling is allowed only at independent Poisson arrival times. We show that when the underlying diffusion is recurrent, the solutions of the discounted problems converge in Abelian sense to those of their ergodic counterparts. Moreover, we show that the solutions of the constrained problems converge to those of their singular counterparts when the Poisson rate tends to infinity. We illustrate the results with drifted Brownian motion and Ornstein-Uhlenbeck process.
      PubDate: 2022-10-03
       
  • Revisiting Shikhmurzaev’s Approach to the Contact Line Problem

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      Abstract: Abstract In this paper, we revisit a model for the contact line problem which has been proposed by Shikhmurzaev (Int. J. Multiph. Flow 19(4):589–610, 1993). In the first part, in addition to rederiving the model, we study in detail the assumptions required to obtain the isothermal limit of the model. We also derive in this paper several lubrication approximation models, based on Shikhmurzaev’s approach. The first two lubrication models describe thin film flow of incompressible fluids on solid substrates, based on different orders of magnitude of the slip length parameter. The third lubrication model describes a meniscus formation where a wedge-shaped solid immerses in a thin film of fluid.
      PubDate: 2022-09-28
       
  • $\mathcal{N}_{A}$ -Isometric Operators on Hilbert Spaces

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      Abstract: Abstract A great deal of excellent work has been done for partial isometries. Thanks to early work of I. Erdélyi & P. R. Halmos, among others; they have played a fundamental role in structural study of Hilbert space operators, especially, in the theory of the polar decomposition of arbitrary operators and in the dimension theory of von Neumann algebras. They have also arisen in quantum physics (Bock et al. in Lett. Math. Phys. 112(2):1–11, 2022; Bracci and Picasso in Bull. Lond. Math. Soc. 39(5):792–802, 2007; Lai et al. in Quantum Inf. Process. 21(3):1–17, 2022). Based on the study of partial isometries (Erdélyi in J. Math. Anal. Appl. 22:546–551, 1968; Ezzahraoui et al. in Arch. Math. 110(3):251–259, 2018; Halmos and McLaughlin in Pac. J. Math. 13:585–596, 1963; Halmos and Wallen in J. Math. Mech. 19:657–663, 1970; Mostafa and Skhiri in Integral Equ. Oper. Theory 38:334–349, 2000; Wallen in Bull. Am. Math. Soc. 75:763–764, 1969) and semi-generalized partial isometries (Garbouj and Skhiri in Results Math. 75(1):15, 2020), for a given linear bounded non-zero operator \(A\) , we introduce a new class of operators called \(\mathcal{N}_{A}\) -isometries. We present its basic properties, and show a variety of results which improve and extend some works related to classical partial isometries.
      PubDate: 2022-09-27
       
  • Recursion Operators for Multidimensional Integrable PDEs

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      Abstract: Abstract We present a novel construction of recursion operators for integrable second-order multidimensional PDEs admitting isospectral scalar Lax pairs with Lax operators being first-order scalar differential operators linear in the spectral parameter. Our approach, illustrated by several examples and applicable to many other PDEs of the kind in question, employs an ansatz for the sought-for recursion operator of the equation under study based on the Lax pair for the latter.
      PubDate: 2022-09-20
      DOI: 10.1007/s10440-022-00524-8
       
  • On Some Nonlocal Elliptic Systems with Gradient Source Terms

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      Abstract: Abstract In this work, we investigate the existence and nonexistence of nonnegative solutions to a class of nonlocal elliptic systems set in a bounded open subset of , where the gradients of the unknowns act as source terms (see \((S)\) below). Our approach can be also used to treat other nonlinear systems with different structures. This work extends previous results obtained in the local case by the fourth author and his coworkers, and points to significant differences between the local and the nonlocal cases.
      PubDate: 2022-09-14
      DOI: 10.1007/s10440-022-00528-4
       
  • Global Existence of Weak Solutions for the 2D Incompressible
           Keller-Segel-Navier-Stokes Equations with Partial Diffusion

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      Abstract: Abstract In this paper, we establish the global existence of weak solutions for the incompressible Keller-Segel-Navier-Stokes equation with partial diffusion in . For the lack of diffusion \(\Delta \rho \) , we explore the structure of the equations and construct a priori estimates. With the help of uniform boundedness, we obtain the desired results.
      PubDate: 2022-09-12
      DOI: 10.1007/s10440-022-00529-3
       
 
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