Results 21 to 30 of about 140,110 (288)

Long Wavelength Coherency in Well Connected Electric Power Networks

open access: yesIEEE Access, 2022
We investigate coherent oscillations in large scale transmission power grids, where large groups of generators respond in unison to a distant disturbance. Such long wavelength coherent phenomena are known as inter-area oscillations.
Julian Fritzsch, Philippe Jacquod
doaj   +1 more source

On multi-singular integral equations involving n weakly singular kernels

open access: yesFilomat, 2018
We deal with some sources of Banach spaces which are closely related to an important issue in applied mathematics i.e. the problem of existence and uniqueness of the solution for the very applicable weakly singular integral equations. In the classical mode, the uniform space (C[a,b], ||.||?) is usually applied to the related discussion ...
Sales, S. M. S. Nabavi, Baghani, O.
openaire   +3 more sources

Interpolation method for solving Volterra integral equations with weakly singular kernel using an advanced barycentric Lagrange formula

open access: yesAin Shams Engineering Journal, 2022
We presented an interpolation method for solving weakly singular Volterra integral equations of the second kind (SVK2). The method based on the barycentric Lagrange interpolation.. For the chosen nodes of the two singular kernel variables, we created two
E.S. Shoukralla   +3 more
doaj   +1 more source

Asymptotics of integrodifferential models with integrable kernels II

open access: yesInternational Journal of Mathematics and Mathematical Sciences, 2003
Nonlinear singularly perturbed Volterra integrodifferential equations with weakly singular kernels are investigated using singular perturbation methods, the Mellin transform technique, and the theory of fractional integration.
Angelina M. Bijura
doaj   +1 more source

Weakly-exceptional singularities in higher dimensions [PDF]

open access: yesJournal für die reine und angewandte Mathematik (Crelles Journal), 2012
Abstract. We show that infinitely many Gorenstein weakly-exceptional quotient singularities exist in all dimensions, we prove a weak-exceptionality criterion for five-dimensional quotient singularities, and we find a sufficient condition for being weakly-exceptional for six-dimensional quotient singularities.
Cheltsov, Ivan, Shramov, Constantin
openaire   +2 more sources

Sign-Periodicity of Traces of Singular Moduli

open access: yesMathematics, 2013
Zagier proved that the generating functions of traces of singular values of Jm(z) are weight 3/2 weakly holomorphic modular forms. In this paper we prove that there is the sign-periodicity of traces of singular values of Jm(z).
Subong Lim, Dohoon Choi, Byungchan Kim
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

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

Singularity Preserving Galerkin Methods for Weakly Singular Fredholm Integral Equations

open access: yesJournal of Integral Equations and Applications, 1994
A singularity preserving projection approximation for the solution of the equation \(y(s) - \int^ 1_ 0 k(s,t) y(t)dt = f(x)\), \(0 \leq s \leq 1\), having an optimal order of convergence, is presented and a numerical example is given to illustrate the numerical accuracy of the current method in comparison with the conventional Galerkin method.
Cao, Yanzhao, Xu, Yuesheng
openaire   +2 more sources

Cosmological solutions with nonlinear bulk viscosity [PDF]

open access: yes, 1997
A recently proposed nonlinear transport equation is used to model bulk viscous cosmologies that may be far from equilibrium, as happens during viscous fluid inflation or during reheating.
  +14 more
core   +2 more sources

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