Results 71 to 80 of about 1,218,779 (86)

Primordial black holes and their gravitational-wave signatures. [PDF]

Living Rev Relativ
Bagui E, Clesse S, De Luca V, Ezquiaga JM, Franciolini G, García-Bellido J, Joana C, Kumar Jain R, Kuroyanagi S, Musco I, Papanikolaou T, Raccanelli A, Renaux-Petel S, Riotto A, Ruiz Morales E, Scalisi M, Sergijenko O, Ünal C, Vennin V, Wands D, LISA Cosmology Working Group.   +20 more
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On Analytical Solution of Ambartsumian Equation

The National Academy of Sciences, India, 2017
The Ambartsumian equation is used in the theory of surface brightness in milky way. This equation is a linear differential equation involving a proportional delay term. In this paper we use the Daftardar-Gejji and Jafari method to obtain analytical solution of Ambartsumian equation.
Jayvant Patade, Sachin Bhalekar
exaly   +2 more sources

Development of analytical solution for a generalized Ambartsumian equation

AIMS Mathematics, 2020
Sur la base de la dérivée conformable, un modèle généralisé de l'équation ambartsumienne est analysé dans cet article. La solution est exprimée comme une série de puissances de puissances arbitraires. De plus, la convergence de la solution série obtenue est théoriquement prouvée.
Essam El-zahar, Abdelhalim Ebaid
exaly   +3 more sources

A study of fractional order Ambartsumian equation involving exponential decay kernel

AIMS Mathematics, 2021
Récemment, les opérateurs fractionnaires non singuliers ont un rôle important dans la modélisation des problèmes du monde réel. Plus précisément, les opérateurs Caputo-Fabrizio sont utilisés pour étudier une meilleure dynamique des processus de mémoire.
manuel de la Sen, Ali Akgül, Shabir Ahmad   +2 more
exaly   +4 more sources

A numerical treatment of the delayed Ambartsumian equation over large interval

Journal of Interdisciplinary Mathematics, 2020
In this paper, a numerical technique based on matrix collocation method is presented for approximating the solution of the Ambartsumian equation in terms of the shifted Bernoulli polynomials.
Mostafa Eslami, Waleed Adel, Mohammad Mirzazadeh   +2 more
exaly   +2 more sources

Iterative Methods of Solving Ambartsumian Equations. Part 2

Technical Physics, 2022
I. V. Boykov, A. A. Pivkina
exaly   +2 more sources

Analysis of a fractional model of the Ambartsumian equation

European Physical Journal Plus, 2018
The prime target of this work is to investigate a fractional model of the Ambartsumian equation. This equation is very useful to describe the surface brightness of the Milky Way. The Ambartsumian equation of fractional order is solved with the aid of the HATM.
Devendra Kumar, Jagdev Singh, Sushila Rathore   +2 more
exaly   +2 more sources

A comparison between Monte Carlo method and the numerical solution of the Ambartsumian-Chandrasekhar equations to unravel the dielectric response of metals [PDF]

Computational Materials Science, 2020
In this work we describe two different models for interpreting and predicting Reflection Electron Energy Loss (REEL) spectra and we present results of a study on metallic systems comparing the computational cost and the accuracy of these techniques. These approaches are the Monte Carlo (MC) method and the Numerical Solution (NS) of the Ambartsumian ...
Maurizio Dapor, Pavel Kaplya, Nicola Pugno   +2 more
exaly   +4 more sources

On the solution of the Ambartsumian-Chandrasekhar equation by monotone iteration processes

Journal of Computational Physics, 1975
exaly   +2 more sources

Numerical Solution of the Ambartsumian Functional Equations for a Plane Medium with Finite Thickness

Astrophysics, 2018
A numerical algorithm is used to solve the Ambartsumian functional equations for a finite layer. Calculations are done for the special case of frequency redistribution of the radiation. To do this the program first calculates the nodes of Hermite polynomials and the corresponding weights using a program package that works with a large number of ...
H. A. Harutyunian, H. A. Poghosyan
openaire   +1 more source