Results 21 to 30 of about 37,013 (235)

Conditioning bounds for traveltime tomography in layered media [PDF]

open access: yes, 2011
This paper revisits the problem of recovering a smooth, isotropic, layered wave speed profile from surface traveltime information. While it is classic knowledge that the diving (refracted) rays classically determine the wave speed in a weakly well-posed ...
Abramowitz M   +18 more
core   +3 more sources

A M\"untz-Collocation spectral method for weakly singular volterra integral equations [PDF]

open access: yes, 2019
In this paper we propose and analyze a fractional Jacobi-collocation spectral method for the second kind Volterra integral equations (VIEs) with weakly singular kernel $(x-s)^{-\mu ...
Azaiez, Mejdi   +3 more
core   +2 more sources

On the Kolmogorov--Wiener--Masani spectrum of a multi-mode weakly stationary quantum process [PDF]

open access: yes, 2016
We introduce the notion of a $k$-mode weakly stationary quantum process $\varrho$ based on the canonical Schr\"odinger pairs of position and momentum observables in copies of $L^2(\mathbb{R}^k)$, indexed by an additive abelian group $D$ of countable ...
Parthasarathy, K. R.   +1 more
core   +3 more sources

A Product Integration type Method for solving Nonlinear Integral Equations in L

open access: yes, 2016
This paper deals with nonlinear Fredholm integral equations of the second kind. We study the case of a weakly singular kernel and we set the problem in the space L 1 ([a, b], C). As numerical method, we extend the product integration scheme from C 0 ([a,
Ahues, M., Grammont, L., Kaboul, H.
core   +5 more sources

New Integral Inequalities with Weakly Singular Kernel for Discontinuous Functions and Their Applications to Impulsive Fractional Differential Systems

open access: yesJournal of Applied Mathematics, 2014
Some new integral inequalities with weakly singular kernel for discontinuous functions are established using the method of successive iteration and properties of Mittag-Leffler function, which can be used in the qualitative analysis of the solutions to ...
Jing Shao
doaj   +1 more source

Approximation Solution of Fuzzy Singular Volterra Integral Equation by Non-Polynomial Spline

open access: yesIbn Al-Haitham Journal for Pure and Applied Sciences, 2023
A non-polynomial spline (NPS) is an approximation method that relies on the triangular and polynomial parts, so the method has infinite derivatives of the triangular part of the NPS to compensate for the loss of smoothness inherited by the polynomial. In
Zahraa A. Ibrahim, Nabaa N. Hasan
doaj   +1 more source

Fractional-order Euler functions for solving fractional integro-differential equations with weakly singular kernel

open access: yesAdvances in Difference Equations, 2018
In this paper, a new set of functions called fractional-order Euler functions (FEFs) is constructed to obtain the solution of fractional integro-differential equations.
Yanxin Wang, Li Zhu, Zhi Wang
doaj   +1 more source

Electromagnetic wave scattering by small bodies

open access: yes, 2008
A reduction of the Maxwell's system to a Fredholm second-kind integral equation with weakly singular kernel is given for electromagnetic (EM) wave scattering by one and many small bodies.
A.G. Ramm   +13 more
core   +5 more sources

Singularly perturbed Volterra integral equations with weakly singular kernels

open access: yesInternational Journal of Mathematics and Mathematical Sciences, 2002
We consider finding asymptotic solutions of the singularly perturbed linear Volterra integral equations with weakly singular kernels. An interesting aspect of these problems is that the discontinuity of the kernel causes layer solutions to decay ...
Angelina Bijura
doaj   +1 more source

Numerical solution of variable-order time fractional weakly singular partial integro-differential equations with error estimation

open access: yesMathematical Modelling and Analysis, 2020
In this paper, we apply Legendre-Laguerre functions (LLFs) and collocation method to obtain the approximate solution of variable-order time-fractional partial integro-differential equations (VO-TF-PIDEs) with the weakly singular kernel.
Haniye Dehestani   +2 more
doaj   +1 more source

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