Results 11 to 20 of about 7,672 (218)

Constant-Sign Green’s Function of a Second-Order Perturbed Periodic Problem

open access: yesAxioms, 2022
In this paper, we were interested in obtaining the exact expression and studying the regions of constant sign of Green’s function related to a second-order perturbed periodic problem coupled with integral boundary conditions at the extremes of the ...
Alberto Cabada   +2 more
doaj   +1 more source

Calculating the Green’s function of two-site fermionic Hubbard model in a photonic system

open access: yesNew Journal of Physics, 2022
The Green’s function has been an indispensable tool to study many-body systems that remain one of the biggest challenges in modern quantum physics for decades. The complicated calculation of the Green’s function impedes the research of many-body systems.
Jie Zhu   +4 more
doaj   +1 more source

Penyelesaian Persamaan Telegraph Dan Simulasinya

open access: yesJurnal Fourier, 2013
Equation Telegraph is one of type from wave equation. Solving of the wave equation obtainable by using Green's function with the method of boundary condition problem.
Agus Miftakus Surur   +2 more
doaj   +1 more source

Maximal and minimal iterative positive solutions for singular infinite-point p-Laplacian fractional differential equations

open access: yesNonlinear Analysis, 2019
The existence of maximal and minimal positive solutions for singular infinite-point p-Laplacian fractional differential equation is investigated in this paper. Green's function is derived, and some properties of Green's function are obtained.
Limin Guo, Lishan Liu
doaj   +1 more source

Compact expression of dyadic Green's function for homogeneous dielectric half‐space and its efficient double integral representation

open access: yesIET Microwaves, Antennas & Propagation, 2022
The dyadic Green's function can be represented via spatial derivatives of two Sommerfeld integrals when an infinitesimal electric dipole and an observation point are located above an infinite planar dielectric interface.
Il‐Suek Koh
doaj   +1 more source

Riquier–Neumann Problem for the Polyharmonic Equation in a Ball

open access: yesMathematics, 2023
The Green’s function of the Riquier–Neumann problem for the polyharmonic equation in the unit ball is constructed. Using the obtained Green’s function, an integral representation of the solution to the Riquier–Neumann problem in the unit ball is found.
Valery Karachik
doaj   +1 more source

Green's functions and existence of solutions of nonlinear fractional implicit difference equations with Dirichlet boundary conditions [PDF]

open access: yesOpuscula Mathematica
This article is devoted to deduce the expression of the Green's function related to a general constant coefficients fractional difference equation coupled to Dirichlet conditions. In this case, due to the points where some of the fractional operators are
Alberto Cabada   +2 more
doaj   +1 more source

Analyticity and crossing symmetry of superstring loop amplitudes

open access: yesJournal of High Energy Physics, 2019
Bros, Epstein and Glaser proved crossing symmetry of the S-matrix of a theory without massless fields by using certain analyticity properties of the off-shell momentum space Green’s function in the complex momentum plane.
Corinne de Lacroix   +2 more
doaj   +1 more source

Green’s Function for Elastic Half-Strip

open access: yesНаука и техника
In the presented work, vertical displacements of the upper face of an elastic half-strip with a hinged lower face are analytically determined under the action of a vertical concentrated force applied vertically to the upper face. In this case, the method
S. V. Bosakov, M. A. Melyanyuk
doaj   +1 more source

Calculation of Green's Function for Poisson's Equation in Plane Polar Coordinates

open access: yesTrends in Computational and Applied Mathematics
A new calculation of Green's function for Poisson's equation in plane polar coordinates is presented. The method consists in first calculating the solution to the simpler problem, but with the same Green's function, that is obtained with the ...
R. T. Couto
doaj   +1 more source

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