Results 11 to 20 of about 5,619,071 (301)

Existence of Classical Solutions for Nonlinear Elliptic Equations with Gradient Terms

open access: yesEntropy, 2022
This paper deals with the existence of solutions of the elliptic equation with nonlinear gradient term −Δu=f(x,u,∇u) on Ω restricted by the boundary condition u|∂Ω=0, where Ω is a bounded domain in RN with sufficiently smooth boundary ∂Ω, N≥2, and f:Ω¯×R×
Yongxiang Li, Weifeng Ma
doaj   +1 more source

Positive Solution For Eigen value Problems [PDF]

open access: yesمجلة جامعة الانبار للعلوم الصرفة, 2010
Studying the boundary value problem :- Values of the parameter (  ) are determined for which this problem has a positive solution. The methods used here extend recent works by a simple application of a Fixed Point Theorem in cones . I show the existence
Saleh . M . Hussein
doaj   +1 more source

Positive Solutions of Difference Equations [PDF]

open access: yesProceedings of the American Mathematical Society, 1990
Proceedings of the American Mathematical ...
Philos, C. G., Sficas, Y. G.
openaire   +2 more sources

On the existence of positive periodic solutions for totally nonlinear neutral differential equations of the second-order with functional delay [PDF]

open access: yesOpuscula Mathematica, 2014
We prove that the totally nonlinear second-order neutral differential equation \[\frac{d^2}{dt^2}x(t)+p(t)\frac{d}{dt}x(t)+q(t)h(x(t))\] \[=\frac{d}{dt}c(t,x(t-\tau(t)))+f(t,\rho(x(t)),g(x(t-\tau(t))))\] has positive periodic solutions by employing the ...
Emmanuel K. Essel, Ernest Yankson
doaj   +1 more source

The parallel approximability of a subclass of quadratic programming [PDF]

open access: yes, 1997
In this paper we deal with the parallel approximability of a special class of Quadratic Programming (QP), called Smooth Positive Quadratic Programming. This subclass of QP is obtained by imposing restrictions on the coefficients of the QP instance.
Serna Iglesias, María José   +1 more
core   +1 more source

Algebraic Systems with Positive Coefficients and Positive Solutions

open access: yesMathematics, 2022
The paper is devoted to the existence, uniqueness and nonuniqueness of positive solutions to nonlinear algebraic systems of equations with positive coefficients. Such systems appear in large numbers of applications, such as steady-state equations in continuous and discrete dynamical models, Dirichlet problems, difference equations, boundary value ...
Ana Maria Acu   +2 more
openaire   +2 more sources

Positive practices : solution-focused and narrative therapeutic techniques with children with sexually harmful behaviours [PDF]

open access: yes, 2006
This article explores the use of solution-focused and Narrative Therapeutic approaches with a boy who had sexually harmful behaviours. The paper will highlight the practical challenges of working with someone who is 'problem-saturated' through ...
Berg I. K.   +25 more
core   +1 more source

Supergravities with Minkowski x Sphere Vacua [PDF]

open access: yes, 2004
Recently the authors have introduced a new gauged supergravity theory with a positive definite potential in D=6, obtained through a generalised Kaluza-Klein reduction from D=7.
C.N Pope   +8 more
core   +3 more sources

Moving mesh finite difference solution of non-equilibrium radiation diffusion equations [PDF]

open access: yes, 2018
A moving mesh finite difference method based on the moving mesh partial differential equation is proposed for the numerical solution of the 2T model for multi-material, non-equilibrium radiation diffusion equations. The model involves nonlinear diffusion
Huang, Weizhang   +2 more
core   +2 more sources

Existence and uniqueness of positive solutions for a class of nonlinear fractional differential equations with mixed-type boundary value conditions

open access: yesNonlinear Analysis, 2018
In this article, we study a class of nonlinear fractional differential equations with mixed-type boundary conditions. The fractional derivatives are involved in the nonlinear term and the boundary conditions. By using the properties of the Green function,
Fang Wang   +3 more
doaj   +1 more source

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