Zobrazeno 1 - 10
of 139
pro vyhledávání: '"Lazhar Bougoffa"'
Publikováno v:
AIMS Mathematics, Vol 9, Iss 1, Pp 775-791 (2024)
In this paper, we present a comprehensive analysis of the lower and upper bounds of solutions for a nonlinear second-order ordinary differential equation governing the electrohydrodynamic flow of a conducting fluid in cylindrical conduits. The equati
Externí odkaz:
https://doaj.org/article/d1b26c8f8d7b42a28698b2853a3cf020
Publikováno v:
AIMS Mathematics, Vol 8, Iss 5, Pp 10529-10546 (2023)
The existence and uniqueness theorem for the generalized boundary value problem of the Thomas-Fermi equation: $ \begin{eqnarray*} \left\{ \begin{array}{l} y''+f(x, y) = 0, \ 00, \ 0
Externí odkaz:
https://doaj.org/article/c88deb8665204aeaba4fc3e7e2515d09
Publikováno v:
Axioms, Vol 13, Iss 3, p 201 (2024)
This article provides a detailed exploration of the SIR epidemic model, starting with its meticulous formulation. The study employs a novel approach called the upper and lower bounds technique to approximate the solution to the SIR model, providing i
Externí odkaz:
https://doaj.org/article/df786e5b85724c7f86a498edd16d2b12
Publikováno v:
Axioms, Vol 13, Iss 1, p 14 (2023)
The analytic solution for a general form of the Stefan problem with nonlinear temperature-dependent thermal parameters and a heat source the term is obtained. We prove the existence and uniqueness of the solution to the problem in the absence of a he
Externí odkaz:
https://doaj.org/article/c144f20fdc7d45f3a56030ea6d2fda23
Autor:
Ammar Khanfer, Lazhar Bougoffa
Publikováno v:
AIMS Mathematics, Vol 6, Iss 10, Pp 11467-11481 (2021)
The purpose of this paper is to establish an existence theorem for a system of nonlinear fourth-order differential equations with two parameters $ \begin{eqnarray*} \left\{ \begin{array}{rcl} u^{(4)}+A(x)u& = &\lambda f(x, u, v, u'', v''), \ 0 0,
Externí odkaz:
https://doaj.org/article/58f50db6787245348396fa01e47c2609
Autor:
Ammar Khanfer, Lazhar Bougoffa
Publikováno v:
AIMS Mathematics, Vol 6, Iss 9, Pp 9899-9910 (2021)
$ {equation*} u^{(4)}+A(x)u = \lambda f (x, \ u, \ u''), \ 0 0 $ is a parameter and $ p, q \in \mathbb{L}^{1}[0, 1]. $
Externí odkaz:
https://doaj.org/article/51c6e48ab0b1464ba08053f2ceaa64d4
Publikováno v:
Results in Physics, Vol 39, Iss , Pp 105761- (2022)
In this paper, we are concerned with a generalization of a coupled integrable dispersionless system, which plays a crucial role in nonlinear problems. We show with the appropriate transformations that the solutions can be expressed in terms of those
Externí odkaz:
https://doaj.org/article/582f581d23084a94addec46f3e78aa8c
Autor:
Lazhar Bougoffa, Ammar Khanfer
Publikováno v:
AIMS Mathematics, Vol 6, Iss 6, Pp 6569-6579 (2021)
Solutions of similarity-type for a nonlinear non-classical Stefan problem with temperature-dependent thermal conductivity and a Robin boundary condition are obtained. The analysis of several particular cases are given when the thermal conductivity L(
Externí odkaz:
https://doaj.org/article/6501d36785f44ff988778de24f9aaf10
Publikováno v:
Axioms, Vol 12, Iss 5, p 497 (2023)
Approximate solutions are obtained in implicit forms for the following general form of the nonlinear Stefan problem ddx(1+δ1yp)dydx+2x(1+δ2yp)dydx=4Steβ(x),00 is a solution to the nonlinear equation y′(λ)=
Externí odkaz:
https://doaj.org/article/91b58005ac7a4d89aa384ce14eb2e0b7
Autor:
Lazhar Bougoffa
Publikováno v:
Results in Physics, Vol 30, Iss , Pp 104818- (2021)
The aim of this comment paper is to show that the results obtained as semi-analytical solutions in [1] are incorrect.
Externí odkaz:
https://doaj.org/article/02a6925eceb3427083a9cafa401212f8