Subjects -> MATHEMATICS (Total: 1013 journals)
    - APPLIED MATHEMATICS (92 journals)
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    - MATHEMATICS (714 journals)
    - MATHEMATICS (GENERAL) (45 journals)
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    - PROBABILITIES AND MATH STATISTICS (113 journals)

MATHEMATICS (714 journals)            First | 1 2 3 4     

Showing 601 - 538 of 538 Journals sorted alphabetically
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: 13)
Stochastic Analysis and Applications     Hybrid Journal   (Followers: 2)
Stochastic Partial Differential Equations : Analysis and Computations     Hybrid Journal   (Followers: 1)
Stochastic Processes and their Applications     Hybrid Journal   (Followers: 5)
Stochastics and Dynamics     Hybrid Journal  
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: 2)
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: 1)
Water SA     Open Access   (Followers: 2)
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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Ricerche di Matematica
Journal Prestige (SJR): 0.479
Citation Impact (citeScore): 1
Number of Followers: 0  
 
  Hybrid Journal Hybrid journal (It can contain Open Access articles)
ISSN (Print) 1827-3491 - ISSN (Online) 0035-5038
Published by Springer-Verlag Homepage  [2469 journals]
  • A Leslie–Gower type predator-prey model considering herd behavior

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      Abstract: Abstract In 1959 Crawford S. Holling formulated a classification to model the action of the predators over their prey, doing empirical works. In this taxonomy, he introduced only three types of functional responses dependent only on the prey population, which are described by saturated functions. Later, various other types have been proposed, including the functional responses dependent on both populations. This work concerns the study of the Leslie–Gower type predator-prey model, incorporating the Rosenzweig functional response described by a power law. The elected function does not conform to the types proposed by Holling since it is unbounded, being, besides, non-differentiable for \(x = 0\) ; nonetheless, the obtained system is Lipschitzian. Moreover, the existence of a separatrix curve \(\Sigma \) in the phase plane is proven, which is divided into two complementary sectors. According to the position of the initial conditions with respect to the curve, the trajectories can have different \(\omega \) -limit sets, which can be the equilibrium \(\left( 0,0\right) \) , or a positive equilibrium, or a heteroclinic curve, or a stable limit cycle. These properties show the great difference of this model with the original Leslie–Gower model, in which a unique positive equilibrium exists, which is globally asymptotically stable, when it exists. Then, the analyzed system has a richer dynamic than the original system in which a linear functional response is considered, also unbounded. Numerical simulations and bifurcation diagrams are given to endorse our analytical results.
      PubDate: 2022-05-13
       
  • Anisotropic (p, q)-equations with superlinear reaction

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      Abstract: Abstract In this paper, we consider a Dirichlet problem driven by the anisotropic (p, q)-Laplacian and a superlinear reaction which need not satisfy the Ambrosetti–Robinowitz condition. By using variational tools together with truncation and comparison techniques and critical groups, we show the existence of at least five nontrivial smooth solutions, all with sign information: two positive, two negative and a nodal (sign-changing).
      PubDate: 2022-05-09
       
  • Complex solutions to the higher-order nonlinear boussinesq type wave
           equation transform

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      Abstract: Abstract The higher-order nonlinear Boussinesq type wave equation describes the propagation of small amplitude long capillary–gravity waves on the surface of shallow water. Mathematical physics, shallow water waves, fluid dynamics, and fluid movement are all examples of this model. To acquire exact solutions in the form of solitary wave and complex functions solutions, we use the \(\left( {m + \frac{1}{{G^{\prime}}}} \right)\) -expansion method. These results aid mathematicians and physicians in comprehending the model's physical phenomena. This approach may be employed on different models in order to generate whole new solutions for nonlinear PDEs encountered in mathematical physics.
      PubDate: 2022-05-06
       
  • Similarity solutions for strong magnetogasdynamic cylindrical shock wave
           in rotating axisymmetric ideal gas with radiation heat flux using Lie
           group theoretic method

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      Abstract: Abstract Mathematical model for propagation of cylindrical shock wave under the influence of azimuthal magnetic field in rotating medium with radiation heat flux for adiabatic flow condition, using Lie group of transformation method is formulated and similarity solutions are obtained. The medium ahead of the shock is assumed to be at rest. The density, magnetic field, azimuthal and axial fluid velocities are presumed to be varying in the undisturbed medium. We have obtained two different cases of potential solutions considering different cases for the arbitrary constants appearing in the expressions of infinitesimals. Numerical solutions are obtained in the case of power law shock path. Distributions of magnetogasdynamical quantities are discussed through figures. The effects of increase in ambient azimuthal fluid velocity variation index, strength of magnetic field and ambient density exponent are examined on shock strength and on the flow variables. It is observed that shock strength decreases due to increase in strength of magnetic field. Whereas there is increase in strength of shock due to increase in ambient density or ambient azimuthal fluid velocity variation index. In general, density, azimuthal fluid velocity, pressure, radial fluid velocity, temperature and radiation heat flux decrease as we move inwards from the shock to the axis of symmetry. Magnetic field, axial fluid velocity and non-dimensional azimuthal component of vorticity vector \(l_{\theta }\) increase as we move inwards from the shock to the axis of symmetry. Non dimensional axial component of vorticity vector \(l_{z}\) increases, attains the maximum and then decreases as we move inwards from the shock to the axis of symmetry. Numerical calculations are done and graphs are being plot using software Mathematica.
      PubDate: 2022-05-04
       
  • Mosquito feeding preference and pyrethroids repellent effect eliminate
           backward bifurcation in malaria dynamics

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      Abstract: Abstract Pyrethroid-treated bed-nets (PTNs) protect individuals against malaria by blocking and repelling mosquitoes. We develop and analyze a PTNs malaria model that explicitly includes mosquito host choice (also known as feeding/biting preference) and Pyrethroid repellent effect. Our model reveals that mosquito biting/feeding preference on infectious hosts \(\pi \) and repellent effect r drive for the existence of both the endemic equilibrium points and the occurrence or elimination of backward bifurcation. The threshold parameters for the mosquito biting preference on infectious hosts \(\pi ^*\) and repellent effect \(r^*\) for the occurrence and elimination of backward bifurcation are computed. Moreover, it is shown that, increasing the mosquito host choice rate or decreasing the repellent effect rate, annihilates backward bifurcation, thus facilitating the control of malaria. Furthermore, we prove that the threshold of mosquito biting preference is a monotone increasing function of the repellent effect r. We show that the model exhibits both trans-critical forward bifurcation and backward bifurcation when either the mosquito host choice \(\pi \) crosses a threshold value \(\pi _1\) or the repellent effect r passes through a threshold repellent rate \(r_1\) . Sufficient conditions for the global asymptotic stability of the equilibrium point are derived. On the other hand, it is established that, decreasing the mosquito biting preference or increasing the rate of the repellent effect (i.e personal protection) or the combining both actions, decreases the malaria control reproduction number \(\mathcal R_0\) . Finally, the interplay between the bed-nets treated repellent effect and mosquito host choice and its potential on the dynamics of malaria is investigated and illustrated numerically.
      PubDate: 2022-05-04
       
  • A continuous time Markov chain model for the dynamics of bovine
           tuberculosis in humans and cattle

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      Abstract: Abstract Bovine tuberculosis (bTB) is a disease of major public health concern and economic importance. The disease affects the livelihood of rural livestock farmers, economies of developing countries, human and animal health. In this paper, both deterministic and continuous time Markov chain (CTMC) models are formulated and analyzed to study the dynamics of bovine tuberculosis in humans and cattle. The next generation matrix method is applied to compute the basic reproduction number \(\mathcal {R}_0\) for the deterministic model while the multitype branching process is applied to compute the stochastic threshold for CTMC model. The normalized forward sensitivity index method is used to compute sensitivity indices of model parameters with respect to basic reproduction number \(\mathcal {R}_0\) . The results reveal that infection rate among cattle is the most positive sensitive parameter whereas cattle’s natural death is the most negative sensitive parameter. This suggests that more efforts should be directed at reducing number of infected cattle for possible control of the spread of bTB in human and cattle populations. Numerical simulations for the CTMC stochastic model using 10,000 sample paths is carried out to compute probabilities for disease extinction by varying initial values for infected classes. The results show that, the solutions of CTMC stochastic model are relatively close to the deterministic model solutions. The possibility of bTB extinction is high when it emanates from either humans or infectious dairy products or from a small number of M. bovis bacteria from the environment. However, the disease outbreak occurs when it emerges from infected cattle population. Moreover, the results show that if bTB emerges from infected humans, cattle, dairy product and environment at the same time, then there is disease outbreak. Thus, any intervention measure that targets on reducing number of infected cattle will have significant impact to contain bTB in human and cattle populations.
      PubDate: 2022-04-15
       
  • Some obstacle problems in Musielak spaces

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      Abstract: Abstract In this paper we use the penalization method to prove the existence of solution for variational inequalities of Leray–Lions type, in the setting of Musielak spaces and where the Musielak function doesn’t satisfy the \(\Delta _2\) -condition. Here the right-hand side is in \(L^1.\)
      PubDate: 2022-04-12
       
  • Global $$W^{1,p}$$ W 1 , p regularity for elliptic problem with measure
           source and Leray–Hardy potential

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      Abstract: Abstract In this paper, we develop the Littman–Stampacchia–Weinberger duality approach to obtain global \(W^{1,p}\) estimates for a class of elliptic problems involving Leray–Hardy operators and measure sources in a distributional framework associated to a dual formulation with a specific weight function.
      PubDate: 2022-04-12
       
  • Dynamics of melting heat transfer in thermally developed and chemically
           reactive flow of Eyring- Powell liquid through a curved channel

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      Abstract: Abstract The present article concentrates on the consequences of melting heat transfer on the chemically reactive flow of Eyring-Powell liquid flow via a semi-permeable curved channel in presence of applied magnetic field. The impacts of two types of chemical reaction namely, homogeneous and heterogeneous are considered in the concentration equation. In addition, the characteristics of heat transport phenomena is also examined with the application of thermal radiation. By adopting a scheme of curvilinear coordinates system along with some appropriate similarity conversions a nonlinear ordinary differential equations is attained. The numerical simulation of the determined velocity and transport equations are estimated by using the shooting procedure. The influence of pertinent factors on the flow equations, surface drag force and rate of heat transport are thoroughly discussed via graphs and table. It is noted from the current study that surface drag force and concentration of the liquid are rises with a rising value of the melting parameter, while fluid velocity and its temperature decreases.
      PubDate: 2022-04-12
       
  • Characterizing affine $${\mathcal {C}}$$ C -semigroups

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      Abstract: Abstract Let \({\mathcal {C}} \subset {\mathbb {N}}^p\) be a finitely generated integer cone and \(S\subset {\mathcal {C}}\) be an affine semigroup such that the real cones generated by \({\mathcal {C}}\) and by S are equal. The semigroup S is called \({\mathcal {C}}\) -semigroup if \({\mathcal {C}}\setminus S\) is a finite set. In this paper, we characterize the \({\mathcal {C}}\) -semigroups from their minimal generating sets, and we give an algorithm to check if S is a \({\mathcal {C}}\) -semigroup and to compute its set of gaps. We also study the embedding dimension of \({\mathcal {C}}\) -semigroups obtaining a lower bound for it, and introduce some families of \({\mathcal {C}}\) -semigroups whose embedding dimension reaches our bound. In the last section, we present a method to obtain a decomposition of a \({\mathcal {C}}\) -semigroup into irreducible \({\mathcal {C}}\) -semigroups.
      PubDate: 2022-04-11
       
  • How the nature of behavior change affects the impact of asymptomatic
           coronavirus transmission

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      Abstract: Abstract SARS-CoV-2 has caused severe respiratory illnesses and deaths since late 2019 and spreads globally. While asymptomatic cases play a crucial role in transmitting COVID-19, they do not contribute to the observed prevalence, which drives behavior change during the pandemic. This study aims to identify the effect of the proportion of asymptomatic infections on the magnitude of an epidemic under behavior change scenarios by developing a compartmental mathematical model. In this interest, we discuss three different behavior change cases separately: constant behavior change, instantaneous behavior change response to the disease’s perceived prevalence, and piecewise constant behavior change response to government policies. Our results imply that the proportion of asymptomatic infections which maximizes the spread of the epidemic depends on the nature of the dominant force driving behavior changes.
      PubDate: 2022-04-08
       
  • A numerical technique for solving Volterra-Fredholm integral equations
           using Chebyshev spectral method

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      Abstract: Abstract In this study, we propose a highly accurate technique for solving Volterra and Fredholm integral equations based on the blending of the Chebyshev pseudo methods. The application of the method leads Volterra and Fredholm integral equation to a system of linear algebraic equations that are easy to solve when compared to a integral equations. Some examples are solved and presented through graphs and tables and the obtained results are compared with those methods in the literature to illustrate the ability of the method. The results demonstrate that the new method is more efficient, converges and accurate to the exact solution.
      PubDate: 2022-04-06
       
  • Heat transport performance of hydromagnetic hybrid nanofluid under the
           slip regime

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      Abstract: Abstract Heat transport analysis corresponded to converging/diverging consideration has attained the attensions because of engineering and industrial utilization. Typical examples encompass cold drawing operation in polymer industry, enhancement of rate of heat transport during process of heat exchangers for milk flowing, molten polymers extrusion via converging dies, processing plants, power stations, and numerous others. Due to this fact, the present analysis has been established. The current research describes the hybrid nanofluid flow through convergent/divergent channel in the regime of hydromagnetic phenomenon. Here, water based nanoparticles i.e., graphene oxide and polystyrene are considered. Heat transport under the viscous dissipation and heat generation/ absorption is evaluated. Velocity slip condition is also imposed on channel wall. Suitable variables are employed to get strong form of non-dimensional coupled equations which are solved by using homotopic analytical technique. The results for velocity and temperature against pertinent parameters are analyzed through graphs. Effects of skin friction and Nusselt numbers are presented through graphs. The current investigation tells us that surface drag has diminished for Reynolds and Hartmann number. Furthermore, dissipative factor intensifies the heat transport rate. Owing by such applications, the present examination has been established.
      PubDate: 2022-04-06
       
  • Heat and mass transport nature of MHD nanofluid flow over a magnetized and
           convectively heated surface including Hall current, magneto and thermo
           diffusions impacts

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      Abstract: Abstract The key interest in this paper to examine the heat and mass transport nature of Ti6Al4V–H20 based nanofluid flow and its interaction with a strong magnetic field. In this study significances of Hall current, magneto and thermo diffusions on the flow behavior are included. The induced magnetic field (IMF) and its consequences on the flow-field are also examined. The non-dimensional flow model is solved analytically by use of perturbation method. In order to scrutinize the effects of relevant flow parameters to the flow nature, the numerical values of flow behaviors corresponds to these parameters are depicted, and graphically and tabuly presented. This kind of a study has significant applications in nano science to explore the heat and mass transport characteristic of electrically conducting nanofluids. An important result noted from this study that, on incrementing the volumetric concentration of nanoparticles in the fluid employing resistance force which cause to reduce the flow velocity and enhance the temperature. The mass diffusion factor grows the flow velocity while it reduces the IMF along the main flow. A key fact noted that Hall current generates IMF by modifying the existing magnetic field.
      PubDate: 2022-04-04
       
  • Spatial regularity for a class of degenerate Kolmogorov equations

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      Abstract: Abstract We establish spatial a priori estimates for the solution u to a class of dilation invariant Kolmogorov equation, where u is assumed to only have a certain amount of regularity in the diffusion’s directions, i.e. \(x_{1}, \ldots , x_{m_{0}}\) . The result is that u is also regular with respect to the remaining directions. The approach we propose is based on the commutators identities and allows us to obtain a Sobolev exponent that does not depend on the integrability assumption of the right-hand side. Lastly, we provide a new proof for the optimal spatial regularity.
      PubDate: 2022-04-02
       
  • Some spectral results for demicompact operators and their restrictions
           with an application to transport equations

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      Abstract: Abstract In this paper, we investigate the \(S_{0_n}\) -demicompactness of the restriction \(T_n\) of a bounded or unbounded linear operator T to \(\mathcal {R}(T^n)\) , where \(S_{0_n}\) is the restriction of a given bounded linear operator \(S_0\) to \(\mathcal {R}(T^n)\) . The results are formulated in terms of a condition of primality and the closedness of certain ranges. Moreover, we set forward some results on upper semi-Fredholm operators involving weak \(S_0\) -demicompactness class. In particular, we give a new characterization of the \(S_0\) -essential radius and localizations results of some \(S_0\) -essential spectra of T. An example of operator equations arising in transport theory is developed.
      PubDate: 2022-03-25
       
  • On Cauchy–Schwarz type inequalities and applications to numerical
           radius inequalities

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      Abstract: Abstract In this work, a refinement of the Cauchy–Schwarz inequality in inner product space is proved. A more general refinement of the Kato’s inequality or the so called mixed Schwarz inequality is established. Refinements of some famous numerical radius inequalities are also pointed out. As shown in this work, these refinements generalize and refine some recent and old results obtained in literature. Among others, it is proved that if \(T\in \mathscr {B}\left( \mathscr {H}\right) \) , then $$\begin{aligned} \omega ^{2}\left( T\right)&\le \frac{1}{12} \left\ \left T \right +\left {T^* } \right \right\ ^2 + \frac{1}{3} \omega \left( T\right) \left\ \left T \right +\left {T^* } \right \right\ \\&\le \frac{1}{6} \left\ \left T \right ^2+ \left {T^* } \right ^2 \right\ + \frac{1}{3} \omega \left( T\right) \left\ \left T \right +\left {T^* } \right \right\ , \end{aligned}$$ which refines the recent inequality obtained by Kittaneh and Moradi in [10].
      PubDate: 2022-03-23
       
  • An exact solution for the semi-stationary compressible Stokes problem

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      Abstract: Abstract In this note, we present an exact solution for the semi-stationary compressible Stokes problem in \({\mathbb {R}}^{N}\) . In the case of radial symmetry, an exact solution with velocity of the form \(c(t)r^{s}\) is obtained for \(s=\frac{1-N\gamma +\gamma }{\gamma +1}\) , where \(\gamma >1\) is the adiabatic index and \(r= x \) . Some interesting properties of the exact solution are analyzed.
      PubDate: 2021-12-31
      DOI: 10.1007/s11587-021-00684-z
       
  • General results on bivariate extended Weibull Morgenstern family and
           concomitants of its generalized order statistics

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      Abstract: Abstract In this paper, we develop the extended Weibull family of distributions to a bivariate class using the Farlie–Gumbel–Morgenstern copula. This is called the bivariate Farlie–Gumbel–Morgenstern extended Weibull family, and some of its properties are investigated. Some special cases of this family and their correlation coefficient are found. Also, the maximum correlation coefficient of most special cases is investigated. We study the concomitants of generalized order statistics from this new class of Morgenstern bivariate distribution and obtain some relevant relations for single and product moments of concomitants. Some well-known information measures such as the Shannon entropy and extropy for concomitants are derived.
      PubDate: 2021-12-31
      DOI: 10.1007/s11587-021-00680-3
       
  • Periodic solutions for p-Laplacian with logistic growth

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      Abstract: Abstract This paper is concerned with the existence and non-existence of positive periodic solutions for \(\frac{\partial u}{\partial t}-\mathrm {div} ( \nabla u ^{p-2} \nabla u )= u^{q}(a-b u^{\beta })\) with \(p>1\) , where \(a=a(x,t)\) and \(b=b(x,t)\) are positive periodic functions. Some numerical simulation also be implemented to verify our results.
      PubDate: 2021-12-31
      DOI: 10.1007/s11587-021-00683-0
       
 
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