Results 21 to 30 of about 199 (47)

On a Nonlocal Boundary Value Problem for Second Order Nonlinear Singular Differential Equations [PDF]

open access: yes, 2000
Criteria for the existence and uniqueness of a solution of a nonlocal second order boundary value problem are estabilished.
A. Lomtatidze, MALAGUTI, Luisa
core  

Regularizing effect of absorption terms in singular problems

open access: yes, 2018
We prove existence of solutions to problems whose model is $$\begin{cases} \displaystyle -\Delta_p u + u^q = \frac{f}{u^\gamma} & \text{in}\ \Omega, \newline u\ge0 &\text{in}\ \Omega,\newline u=0 &\text{on}\ \partial\Omega, \end{cases ...
Oliva, Francescantonio
core   +1 more source

Modelling Axi-symmetric Travelling Waves in a Dielectric with Nonlinear Refractive Index [PDF]

open access: yes, 2018
.: We consider an isotropic dielectric with a nonlinear refractive index. The medium may be inhomogeneous but its spatial variation has an axial symmetry.
Stuart, C.
core  

Positive solutions for second-order differential equations with singularities and separated integral boundary conditions [PDF]

open access: yes, 2020
We study the existence of positive solutions for second-order differential equations with separated integral boundary conditions. The nonlinear part of the equation involves the derivative and may be singular for the second and third space variables. The
Abdella Kenzu   +2 more
core  

A note on the singular Sturm-Liouville problem with infinitely many solutions

open access: yesElectronic Journal of Differential Equations, 2002
We consider the Sturm-Liouville nonlinear boundary-value problem $$ displaylines{ -u''(t) = a(t)f(u(t)), quad 0 < t < 1, cr alpha u(0) - eta u'(0) =0, quad gamma u(1) + delta u'(1) = 0, } $$ where $alpha$, $eta$, $gamma$, $delta geq 0$, $alpha gamma ...
Nickolai Kosmatov
doaj  

A new approach for solving nonlinear Thomas-Fermi equation based on fractional order of rational Bessel functions

open access: yes, 2016
In this paper, the fractional order of rational Bessel functions collocation method (FRBC) to solve Thomas-Fermi equation which is defined in the semi-infinite domain and has singularity at $x = 0$ and its boundary condition occurs at infinity, have been
Delkhosh, M.   +3 more
core   +1 more source

Eigenvalue problems for singular multi-point dynamic equations on time scales

open access: yesElectronic Journal of Differential Equations, 2017
In this article, we study a singular multi-point dynamic eigenvalue problem on time scales. We find existence of positive solutions by constructing the Green's function and studying its positivity eigenvalue intervals. Two examples are given to
Abdulkadir Dogan
doaj  

Solving Singular Boundary Value Problems Using Daftardar-Jafari Method [PDF]

open access: yes, 2012
In this paper, we apply the suggested iterative method by Daftardar and Jafari hereafter called Daftardar-Jafari method for solving singular boundary value problems.
Ahmadi, M., Jafari, H., Sadeghi, S.
core   +1 more source

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