Results 21 to 30 of about 579,120 (288)

Initial-boundary value problems for the defocusing nonlinear Schr\"odinger equation in the semiclassical limit [PDF]

open access: yes, 2014
Initial-boundary value problems for integrable nonlinear partial differential equations have become tractable in recent years due to the development of so-called unified transform techniques.
Miller, Peter D., Qin, Zhenyun
core   +2 more sources

Positive solutions of boundary value problems with nonlinear nonlocal boundary conditions [PDF]

open access: yesOpuscula Mathematica, 2016
We consider the existence of at least three positive solutions of a nonlinear first order problem with a nonlinear nonlocal boundary condition given by \[\begin{aligned} x^{\prime}(t)& = r(t)x(t) + \sum_{i=1}^{m} f_i(t,x(t)), \quad t \in [0,1 ...
Seshadev Padhi, Smita Pati, D. K. Hota
doaj   +1 more source

Boundary oscillations and nonlinear boundary conditions

open access: yesComptes Rendus. Mathématique, 2006
We study how oscillations in the boundary of a domain affect the behavior of solutions of elliptic equations with nonlinear boundary conditions of the type ∂u∂n+g(x,u)=0. We show that there exists a function γ defined on the boundary, that depends on the oscillations at the boundary, such that, if γ is a bounded function, then, for all nonlinearities g,
Arrieta, Jose M., Bruschi, Simone M.
openaire   +3 more sources

Solitons in Nonlinear Media with an Infinite Range of Nonlocality: First Observation of Coherent Elliptic Solitons and of Vortex-Ring Solitons [PDF]

open access: yes, 2005
We present an experimental study on wave propagation in highly nonlocal optically nonlinear media, for which far-away boundary conditions significantly affect the evolution of localized beams.
Carmon, Tal   +4 more
core   +1 more source

SOME ELLIPTIC PROBLEMS WITH NONLINEAR BOUNDARY CONDITIONS [PDF]

open access: yesSpectral Theory and Nonlinear Analysis with Applications to Spatial Ecology, 2005
This paper concerns with some elliptic equations with non-linear boundary conditions. Sub-supersolution and bifurcation methods are used in order to obtain existence, uniqueness or multiplicity of positive solutions.
Morales Rodrigo, Cristian   +4 more
openaire   +3 more sources

The investigation of solutions for nonlinear system of differential equations with boundary conditions [PDF]

open access: yesمجلة التربية والعلم, 2007
In this paper we investigate the existence and approximation for nonlinear system of differential equations with boundary conditions by using the numerical-analytic method for investigate of a periodic solutions which is given by Samoilenko A. M.
R.N. Butris, Azzam salahdin younis
doaj   +1 more source

A Geometric Algorithm to construct new solitons in the O(3) Nonlinear Sigma Model [PDF]

open access: yes, 2002
The O(3) nonlinear sigma model with boundary, in dimension two, is considered. An algorithm to determine all its soliton solutions that preserve a rotational symmetry in the boundary is exhibited.
Albertsson   +22 more
core   +3 more sources

Differential equations with nonlinear boundary conditions [PDF]

open access: yesProceedings of the American Mathematical Society, 1994
This paper shows the existence of multiple unbounded branches of solutions for certain equations via the Nielsen fixed-point theory.
openaire   +2 more sources

Research of the three-point boundary value problems for nonlinear second-order difference equation

open access: yesJournal of Hebei University of Science and Technology, 2021
In order to extend the basic theory of nonlinear discrete boundary value problems,this paper studied the sufficient conditions for the existence of positive solutions for a class of nonlinear second-order difference equations with three-point boundary ...
Wenying WEI, Yude JI, Yanping GUO
doaj   +1 more source

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