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Similar Journals
 Moroccan Journal of Pure and Applied AnalysisNumber of Followers: 0     Open Access journal ISSN (Online) 2351-8227 Published by Sciendo  [370 journals]
• CQ *-algebras of measurable operators

• Abstract: We study, from a quite general point of view, a CQ*-algebra (X, 𝖀0) possessing a sufficient family of bounded positive tracial sesquilinear forms. Non-commutative L2-spaces are shown to constitute examples of a class of CQ*-algebras and any abstract CQ*-algebra (X, 𝖀0) possessing a sufficient family of bounded positive tracial sesquilinear forms can be represented as a direct sum of non-commutative L2-spaces.
PubDate: Sat, 28 May 2022 00:00:00 GMT

• Theoretical and numerical analysis of a degenerate nonlinear cubic
Schrödinger equation

• Abstract: In this paper, we are interested in some theoretical and numerical studies of a special case of a degenerate nonlinear Schrödinger equation namely the so-called Gross-Pitaevskii Equation(GPE). More precisely, we will treat in a first time the well-posedness of GPE model with a degeneracy occurring in the interior of the space variable domain, i.e ∃x0 ∈ (0, L), s. t k(x0) = 0, where k stands for the diffusion coefficient and L is a positive constant. Thereafter, we will focus ourselves on some numerical simulations showing the influence of a different parameters, especially the interior degeneracy, on the behavior of the wave solution corresponding to our model in a special case of the function k namely k(x) = x − x0 α, α ∈ (0, 1).
PubDate: Fri, 06 May 2022 00:00:00 GMT

• Bayesian Inference for SIR Epidemic Model with dependent parameters

• Abstract: This paper is concerned with the Bayesian inference for the dependent parameters of stochastic SIR epidemic model in a closed population. The estimation framework involves the introduction of m − 1 latent data between every pair of observations. Kibble’s bivariate gamma distribution is considered as a good candidate prior density of parameters, they give an appropriate frame to model the dependence between the parameters. A Markov chain Monte Carlo methods are then used to sample the posterior distribution of the model parameters. Simulated datasets are used to illustrate the proposed methodology.
PubDate: Tue, 26 Apr 2022 00:00:00 GMT

• Least energy sign-changing solutions for a nonlocal anisotropic Kirchhoff
type equation

• Abstract: In this paper, we investigate the existence of sign-changing solutions for the following class of fractional Kirchhoff type equations with potential (1+b[ u ]α2)((-Δx)αu-Δyu)+V(x,y)u=f(x,y,u),(x,y)∈ℝN=ℝn×ℝm,\left( {1 + b\left[ u \right]_\alpha ^2} \right)\left( {{{\left( { - {\Delta _x}} \right)}^\alpha }u - {\Delta _y}u} \right) + V\left( {x,y} \right)u = f\left( {x,y,u} \right),\left( {x,y} \right) \in {\mathbb{R}^N} = {\mathbb{R}^n} \times {\mathbb{R}^m}, where [ u ]α=(∫ℝN( (-Δx)α2u 2+ ∇yu 2)dxdy)12{\left[ u \right]_\alpha } = {\left( {\int {_{{\mathbb{R}^N}}\left( {{{\left {{{\left( { - {\Delta _x}} \right)}^{{\alpha \over 2}}}u} \right }^2} + {{\left {{\nabla _y}u} \right }^2}} \right)dxdy} } \right)^{{1 \over 2}}}. Based on variational approach and a variant of the quantitative strain lemma, for each b > 0, we show the existence of a least energy nodal solution ub. In addition, a convergence property of ub as b → 0 is established.
PubDate: Wed, 13 Apr 2022 00:00:00 GMT

• Further results on strictly Lipschitz summing operators

• Abstract: The aim of this paper is to give some new characterizations of strictly Lipschitz p-summing operators. These operators have been introduced in order to improve the Lipschitz p-summing operators. Therefore, we adapt this definition for constructing other classes of Lipschitz mappings which are called strictly Lipschitz p-nuclear and strictly Lipschitz (p, r, s)-summing operators. Some interesting properties and factorization results are obtained for these new classes.
PubDate: Wed, 13 Apr 2022 00:00:00 GMT

• Steklov problems for the Laplace operator involving -norm

• Abstract: In this paper, we are concerned with the study of the spectrum for the nonlinear Steklov problem of the form { Δpu= u p-2uin Ω, ∇u p-2∂u∂v=λ‖ u ‖q,∂Ωp-q u q-2uon ∂Ω, \left\{ {\matrix{{{\Delta _p}u = {{\left u \right }^{p - 2}}u} \hfill & {{\rm{in}}\,\Omega ,} \hfill \cr {{{\left {\nabla u} \right }^{p - 2}}{{\partial u} \over {\partial v}} = \lambda \left\ u \right\ _{q,\partial \Omega }^{p - q}{{\left u \right }^{q - 2}}u} \hfill & {{\rm{on}}\,\partial \Omega ,} \hfill \cr } } \right. where Ω is a smooth bounded domain in ℝN(N ≥ 1), λ is a real number which plays the role of eigenvalue and the unknowns u ∈ W1,p(Ω). Using the Ljusterneck-Shnirelmann theory on C1 manifold and Sobolev trace embedding we prove the existence of an increasing sequence positive of eigenvalues (λk)k≥1, for the above problem. We then establish that the first eigenvalue is simple and isolated.
PubDate: Wed, 13 Apr 2022 00:00:00 GMT

• Existence and multiplicity results for fractional ()-Laplacian Dirichlet
problem

• Abstract: In this paper, we study a class of fractional p(x)-Laplacian Dirichlet problems in a bounded domain with Lipschitz boundary. Using variational methods, we prove in different situations the existence and multiplicity of solutions.
PubDate: Thu, 24 Mar 2022 00:00:00 GMT

• Existence of solutions for 4p-order PDES

• Abstract: In this paper, we study the following nonlinear eigenvalue problem:{ Δ2pu=λm(x)u   in  Ω,u=Δu=…Δ2p−1u=0    on  ∂Ω. \left\{ {\matrix{ {{\Delta ^{2p}}u = \lambda m\left( x \right)u\,\,\,in\,\,\Omega ,} \cr {u = \Delta u = \ldots {\Delta ^{2p - 1}}u = 0\,\,\,\,on\,\,\partial \Omega .} \cr } } \right.Where Ω is a bounded domain in ℝN with smooth boundary ∂Ω, N ≥1, p ∈ ℕ*, m ∈ L∞ (Ω), µ{x ∈ Ω: m(x) > 0} ≠ 0, and Δ2pu := Δ (Δ...(Δu)), 2p times the operator Δ.Using the Szulkin’s theorem, we establish the existence of at least one non decreasing sequence of nonnegative eigenvalues.
PubDate: Thu, 24 Mar 2022 00:00:00 GMT

• Renormalized solutions for a ()-Laplacian equation with Neumann
nonhomogeneous boundary condition involving diffuse measure data and
variable exponent

• Abstract: In this paper we prove the existence of at least one renormalized solution for the p(x)-Laplacian equation associated with a maximal monotone operator and Radon measure data. The functional setting involves Sobolev spaces with variable exponent W1,p(·)(W).
PubDate: Thu, 24 Mar 2022 00:00:00 GMT

• Generalized Canavati Fractional Ostrowski, Opial and Grüss type
inequalities for Banach algebra valued functions

• Abstract: Using generalized Canavati fractional left and right vectorial Taylor formulae we establish mixed fractional Ostrowski, Opial and Grüss type inequalities involving several Banach algebra valued functions. The estimates are with respect to all norms ‖ · ‖ p, 1 ≤ p ≤ ∞. We provide also applications.
PubDate: Thu, 13 Jan 2022 00:00:00 GMT

• Entropy Stable Discontinuous Galerkin Finite Element Method with
Multi-Dimensional Slope Limitation for Euler Equations

• Abstract: We present an entropy stable Discontinuous Galerkin (DG) finite element method to approximate systems of 2-dimensional symmetrizable conservation laws on unstructured grids. The scheme is constructed using a combination of entropy conservative fluxes and entropy-stable numerical dissipation operators. The method is designed to work on structured as well as on unstructured meshes. As solutions of hyperbolic conservation laws can develop discontinuities (shocks) in finite time, we include a multidimensional slope limitation step to suppress spurious oscillations in the vicinity of shocks. The numerical scheme has two steps: the first step is a finite element calculation which includes calculations of fluxes across the edges of the elements using 1-D entropy stable solver. The second step is a procedure of stabilization through a truly multi-dimensional slope limiter. We compared the Entropy Stable Scheme (ESS) versus Roe’s solvers associated with entropy corrections and Osher’s solver. The method is illustrated by computing solution of the two stationary problems: a regular shock reflection problem and a 2-D flow around a double ellipse at high Mach number.
PubDate: Thu, 30 Sep 2021 00:00:00 GMT

• An efficient algorithm for solving the conformable time-space fractional
telegraph equations

• Abstract: In this paper, an efficient algorithm is proposed for solving one dimensional time-space-fractional telegraph equations. The fractional derivatives are described in the conformable sense. This algorithm is based on shifted Chebyshev polynomials of the fourth kind. The time-space fractional telegraph equations is reduced to a linear system of second order differential equations and the Newmark’s method is applied to solve this system. Finally, some numerical examples are presented to confirm the reliability and effectiveness of this algorithm.
PubDate: Fri, 30 Apr 2021 00:00:00 GMT

• On a Class of Caputo Time Fractional Problems with Boundary Integral
Conditions

• Abstract: The aim of this paper is to work out the solvability of a class of Caputo time fractional problems with boundary integral conditions. A generalized formula of integration is demonstrated and applied to establish the a priori estimate of the solution, then we prove the existence which is based on the range density of the operator associated with the problem.
PubDate: Fri, 30 Apr 2021 00:00:00 GMT

• On the generalized fractional Laplace transform

• Abstract: In the present paper a generalization of the Laplace transform is introduced and studied. Its inversion formula is also obtained. As an application, we obtain the generalized fractional Laplace transform of a general class of functions and a product of the Fox’s H- function and general class of functions. The results obtained are of general nature and capable of yielding a large number of known or new results as special cases. For illustration, some special cases involving important special functions are mentioned.
PubDate: Fri, 30 Apr 2021 00:00:00 GMT

• Jacobson’s Lemma in the ring of quaternionic linear operators

• Abstract: In the present paper, we study the Jacobson’s Lemma in the unital ring of all bounded right linear operators ℬR(X) acting on a two-sided quaternionic Banach space X. In particular, let A, B ∈ ℬR(X) and let q ∈ ℍ \ {0}, we prove that w(AB) \ {0} = w(BA) \ {0} where w belongs to the spherical spectrum, the spherical approximate point spectrum, the right spherical spectrum, the left spherical spectrum, the spherical point spectrum, the spherical residual spectrum and the spherical continuous spectrum. We also prove that the range of (AB)2 − 2Re(q)AB + q 2I is closed if and only if (BA)2 − 2Re(q)BA + q 2I has closed range. Finally, we show that (AB)2 − 2Re(q)AB + q 2I is Drazin invertible if and only if (BA)2 − 2Re(q)BA + q 2I is.
PubDate: Fri, 30 Apr 2021 00:00:00 GMT

• Certain Classes of Analytic Functions Associated With -Analogue of -Valent
Cătaş Operator

• Abstract: In this paper, we investigate several interesting properties for certain class of analytic functions defined by q-analogue of p-valent Cătaş operator. All our results are sharp.
PubDate: Fri, 30 Apr 2021 00:00:00 GMT

• Some fixed point theorems of rational type contraction in -metric spaces

• Abstract: In this paper, we prove some common fixed point theorems satisfying contractive type mapping in the setting of b-metric spaces. The presented theorem is an extension the results of M. Sarwar and M. U. Rahman [23] as well as a generalization of many well-known results in the literature through the context of b-metric spaces. Also, we present a few examples to illustrate the validity of the results obtained in the paper. Finally, results are applied to find the solution for an integral equation.
PubDate: Tue, 30 Mar 2021 00:00:00 GMT

• Integral inequalities via harmonically -convexity

• Abstract: In this paper, we establish some estimates of the left side of the generalized Gauss-Jacobi quadrature formula for harmonic h-preinvex functions involving Euler’s beta and hypergeometric functions. The obtained results are mainly based on the identity given by M. A. Noor, K. I. Noor and S. Iftikhar in [17].
PubDate: Tue, 30 Mar 2021 00:00:00 GMT

• Some results about Lipschitz -Nuclear Operators

• Abstract: The aim of this paper is to study the onto isometries of the space of strongly Lipschitz p-nuclear operators, introduced by D. Chen and B. Zheng (Nonlinear Anal.,75, 2012). We give some new results about such isometrics and we focus, in particular, on the case F = ℓp*.
PubDate: Tue, 30 Mar 2021 00:00:00 GMT

• Integral geometry on discrete matrices

• Abstract: In this note, we study the Radon transform and its dual on the discrete matrices by defining hyperplanes as being infinite sets of solutions of linear Diophantine equations. We then give an inversion formula and a support theorem.
PubDate: Tue, 30 Mar 2021 00:00:00 GMT

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Heriot-Watt University
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