Results 1 to 10 of about 139,551 (119)

Explicit bounds of unknown function of some new weakly singular retarded integral inequalities for discontinuous functions and their applications [PDF]

open access: yesJournal of Inequalities and Applications, 2017
The purpose of the present paper is to establish some new retarded weakly singular integral inequalities of Gronwall-Bellman type for discontinuous functions, which generalize some known weakly singular and impulsive integral inequalities.
Zizun Li, Wu-Sheng Wang
doaj   +2 more sources

On Weakly Regular Rings and SSF-rings [PDF]

open access: yesAl-Rafidain Journal of Computer Sciences and Mathematics, 2006
In this work we consider weakly regular rings whose simple singular right R-Modules are flat. We also consider the condition (*): R satisfies L(a)Ír(a) for any aÎR. We prove that if R satisfies(*) and whose simple singular right R-module are flat, then Z
Raida Mahmood
doaj   +1 more source

On the convergence rate of collocation methods for Volterra integral equations with weakly singular oscillatory trigonometric kernels

open access: yesResults in Applied Mathematics, 2023
This paper presents efficient collocation methods for linear Volterra integral equations with weakly singular highly oscillatory kernels. The numerical steepest descent method and generalized Gauss–Laguerre rule are utilized to calculate the weakly ...
Qinghua Wu, Mengjun Sun
doaj   +1 more source

Characterizations of Weakly Approximately Primary Submodules in Some Types of Modules

open access: yesTikrit Journal of Pure Science, 2021
Our aim in this note is to introduce several characterizations of weakly approximately primary submodules in class of multiplication modules. Furthermore, we characterized weakly approximately primary submodules by theirs resudule in the class of ...
Khaled Y. Jhad, Bothaynah N. Shahab
doaj   +1 more source

On Almost Weakly np – injective Rings [PDF]

open access: yesAl-Rafidain Journal of Computer Sciences and Mathematics, 2018
The ring R is called right almost weakly np –injective, if for any , there exists a positive integer n and a left ideal  of R such that . In this paper, we give some characterization and properties of almost weakly np – injective rings.
Raida Mahmood, Amaar Ghaze
doaj   +1 more source

Finite functorial semi-norms and representability [PDF]

open access: yes, 2015
Functorial semi-norms are semi-normed refinements of functors such as singular (co)homology. We investigate how different types of representability affect the (non-)triviality of finite functorial semi-norms on certain functors or classes. In particular,
Loeh, Clara
core   +2 more sources

A New Efficient Method for Solving System of Weakly Singular Fractional Integro-Differential Equations by Shifted Sixth-Kind Chebyshev Polynomials

open access: yesJournal of Mathematics, 2022
In this paper, a new approach for solving the system of fractional integro-differential equation with weakly singular kernels is introduced. The method is based on a class of symmetric orthogonal polynomials called shifted sixth-kind Chebyshev ...
S. Yaghoubi, H. Aminikhah, K. Sadri
doaj   +1 more source

An hp-version discontinuous Galerkin method for integro-differential equations of parabolic type [PDF]

open access: yes, 2011
We study the numerical solution of a class of parabolic integro-differential equations with weakly singular kernels. We use an $hp$-version discontinuous Galerkin (DG) method for the discretization in time.
Brunner, Hermann   +3 more
core   +1 more source

Some New Nonlinear Weakly Singular Inequalities and Applications to Volterra-Type Difference Equation

open access: yesAbstract and Applied Analysis, 2013
Some new nonlinear weakly singular difference inequalities are discussed, which generalize some known weakly singular inequalities and can be used in the analysis of nonlinear Volterra-type difference equations with weakly singular kernel. An application
Kelong Zheng   +2 more
doaj   +1 more source

On the convergence of local expansions of layer potentials [PDF]

open access: yes, 2013
In a recently developed quadrature method (quadrature by expansion or QBX), it was demonstrated that weakly singular or singular layer potentials can be evaluated rapidly and accurately on surface by making use of local expansions about carefully chosen ...
Epstein, Charles L.   +2 more
core   +1 more source

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