Results 11 to 20 of about 537,126 (291)

Multiresolution separated representations of singular and weakly singular operators [PDF]

open access: yesApplied and Computational Harmonic Analysis, 2007
For a finite but arbitrary precision, efficient low separation rank representations for the Poisson kernel and for the projector on the divergence free functions in the dimension \(d=3\)are constructed. The given construction requires computing only one-dimensional integrals.
Beylkin, Gregory   +3 more
openaire   +2 more sources

On Weakly Singular Versions of Discrete Nonlinear Inequalities and Applications [PDF]

open access: yesAbstract and Applied Analysis, 2014
Some new weakly singular versions of discrete nonlinear inequalities are established, which generalize some existing weakly singular inequalities and can be used in the analysis of nonlinear Volterra type difference equations with weakly singular kernels.
Kelong Cheng, Chunxiang Guo, Qingke Zeng
doaj   +2 more sources

A note on the polynomial approximation of vertex singularities in the boundary element method in three dimensions [PDF]

open access: yes, 2008
We study polynomial approximations of vertex singularities of the type $r^\lambda |\log r|^\beta$ on three-dimensional surfaces. The analysis focuses on the case when $\lambda > -\frac 12$.
Bespalov, A, Bespalov, Alexei
core   +7 more sources

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.
H. Mustapha   +7 more
core   +4 more sources

On Type I singularities in Ricci flow [PDF]

open access: yes, 2011
07.02.13 KB. Accepted version ok to add to Spiral. IP/Sherpa.We define several notions of singular set for Type I Ricci flows and show that they all coincide.
Topping, P, Enders, J, Müller, R
core   +6 more sources

Stabilization of solutions of weakly singular quenching problems [PDF]

open access: yesProceedings of the American Mathematical Society, 1993
In this paper we prove that if 0 > β
Fila, Marek   +2 more
openaire   +2 more sources

Lagrangian flows for vector fields with gradient given by a singular integral [PDF]

open access: yes, 2013
We prove quantitative estimates on ows of ordinary di erential equations with vector field with gradient given by a singular integral of an L1 function.
Crippa, Gianluca, Bouchut, Francois
core   +1 more source

On singular projective deformations of two second class totally focal pseudocongruences of planes

open access: yesInternational Journal of Mathematics and Mathematical Sciences, 1988
Let C:L→L¯ be a projective deformation of the second order of two totally focal pseudocongruences L and L¯ of (m−1)-planes in projective spaces Pn and P¯n, 2m−1 ...
Ludmila Goldberg
doaj   +1 more source

Optical soliton perturbation in parabolic law medium having weak non-local nonlinearity by a couple of strategic integration architectures

open access: yesResults in Physics, 2019
In this paper, the governing model with the inclusion of parabolic law nonlinearity, weakly non-local nonlinearity in addition to perturbation terms is examined for the sake of uncovering quite important optical soliton solutions.
Anjan Biswas   +5 more
doaj   +1 more source

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

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