Results 21 to 30 of about 139,571 (138)

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

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

The intermittent behavior and hierarchical clustering of the cosmic mass field [PDF]

open access: yes, 2001
The hierarchical clustering model of the cosmic mass field is examined in the context of intermittency. We show that the mass field satisfying the correlation hierarchy $\xi_n\simeq Q_n(\xi_2)^{n-1}$ is intermittent if $\kappa < d$, where $d$ is the ...
Batchelor G. K.   +9 more
core   +2 more sources

Generalised Dirichelt-to-Neumann map in time dependent domains [PDF]

open access: yes, 2012
We study the heat, linear Schrodinger and linear KdV equations in the domain l(t) < x < ∞, 0 < t < T, with prescribed initial and boundary conditions and with l(t) a given differentiable function.
Baratella   +11 more
core   +1 more source

The predictability of large-scale wind-driven flows [PDF]

open access: yesNonlinear Processes in Geophysics, 2001
The singular values associated with optimally growing perturbations to stationary and time-dependent solutions for the general circulation in an ocean basin provide a measure of the rate at which solutions with nearby initial conditions begin to ...
A. Mahadevan   +4 more
doaj  

Strongly singular MASA's and mixing actions in finite von Neumann algebras

open access: yes, 2008
Let $\Gamma$ be a countable group and let $\Gamma_0$ be an infinite abelian subgroup of $\Gamma$. We prove that if the pair $(\Gamma,\Gamma_0)$ satisfies some combinatorial condition called (SS), then the abelian subalgebra $A=L(\Gamma_0)$ is a singular ...
Jolissaint, Paul, Stalder, Yves
core   +5 more sources

An efficient spectral method for nonlinear Volterra integro-differential equations with weakly singular kernels

open access: yesMathematical Modelling and Analysis
For Volterra integro-differential equations (VIDEs) with weakly singular kernels, their solutions are singular at the initial time. This property brings a great challenge to traditional numerical methods. Here, we investigate the numerical approximation
ZhiPeng Liu, DongYa Tao, Chao Zhang
doaj   +1 more source

On fully discrete collocation methods for solving weakly singular integral equations

open access: yesMathematical Modelling and Analysis, 2009
A popular class of methods for solving weakly singular integral equations is the class of piecewise polynomial collocation methods. In order to implement those methods one has to compute exactly certain integrals that determine the linear system to be ...
Raul Kangro, Inga Kangro
doaj   +1 more source

Shape derivatives of boundary integral operators in electromagnetic scattering. Part I: Shape differentiability of pseudo-homogeneous boundary integral operators

open access: yes, 2012
In this paper we study the shape differentiability properties of a class of boundary integral operators and of potentials with weakly singular pseudo-homogeneous kernels acting between classical Sobolev spaces, with respect to smooth deformations of the ...
Costabel, Martin   +1 more
core   +3 more sources

A Regularization of Fredholm type singular integral equations

open access: yesInternational Journal of Mathematics and Mathematical Sciences, 2001
We present a method to regularize first and second kind integral equations of Fredholm type with singular kernel. By appropriate application of the Poincaré-Bertrand formula we change such integral equations into a second kind Fredholm's integral ...
N. Aliev, S. Mohammad Hosseini
doaj   +1 more source

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