Results 11 to 20 of about 15,291 (210)

Higher-Order Linearization and Regularity in Nonlinear Homogenization [PDF]

open access: yesArchive for Rational Mechanics and Analysis, 2020
AbstractWe prove large-scale $$C^\infty $$C∞ regularity for solutions of nonlinear elliptic equations with random coefficients, thereby obtaining a version of the statement of Hilbert’s 19th problem in the context of homogenization. The analysis proceeds by iteratively improving three statements together: (i) the regularity of the homogenized ...
Armstrong, Scott   +2 more
openaire   +6 more sources

Regularity for the nonlinear Signorini problem

open access: yesAdvances in Mathematics, 2008
zbMATH Open Web Interface contents unavailable due to conflicting licenses.
Milakis, E.   +3 more
openaire   +4 more sources

Approximate entropy and auto mutual information analysis of the electroencephalogram in Alzheimer's disease patients [PDF]

open access: yes, 2008
We analysed the electroencephalogram (EEG) from Alzheimer's disease (AD) patients with two nonlinear methods: approximate entropy (ApEn) and auto mutual information (AMI).
Gomez, C.   +4 more
core   +1 more source

The regularization of nonlinear electrical circuits [PDF]

open access: yesProceedings of the American Mathematical Society, 1975
Recently Smale [1] proposed the question ’under what conditions can an electrical circuit be regularized?’ This note gives a solution to the problem.
openaire   +1 more source

Positive solutions for $(p,2)$-equations with superlinear reaction and a concave boundary term

open access: yesElectronic Journal of Qualitative Theory of Differential Equations, 2020
We consider a nonlinear boundary value problem driven by the $(p,2)$-Laplacian, with a $(p-1)$-superlinear reaction and a parametric concave boundary term (a "concave-convex" problem).
Nikolaos Papageorgiou, Andrea Scapellato
doaj   +1 more source

Nonlinear elliptic boundary value problems with convection term and Hardy potential

open access: yesMoroccan Journal of Pure and Applied Analysis, 2023
In this paper, we deal with a nonlinear elliptic problems that incorporate a Hardy potential and a nonlinear convection term. We establish the existence and regularity of solutions under various assumptions concerning the summability of the source term f.
Achhoud Fessel   +2 more
doaj   +1 more source

Regularized Numerical Methods for the Nonlinear Schrödinger Equation with Singular Nonlinearity

open access: yesEast Asian Journal on Applied Mathematics, 2023
We present different regularizations and numerical methods for the nonlinear Schrödinger equation with singular nonlinearity (sNLSE) including the regularized Lie-Trotter time-splitting (LTTS) methods and regularized Lawson-type exponential integrator (LTEI) methods. Due to the blowup of the singular nonlinearity, i.e., $f(ρ)=ρ^α$ with a fixed exponent
Weizhu Bao, Yue Feng 0006, Ying Ma
openaire   +2 more sources

Nonlinear effects in the regularity problems for infinite dimensional evolutions of unbounded spin systems

open access: yesCondensed Matter Physics, 2006
We study the regularity problems for unbounded spin systems of anharmonic oscillators, that approximate multi-dimensional Euclidean field theories. The main attention is paid to the effect of anharmonism on the C∞-regularity properties of evolutional ...
Alexander Val. Antoniouk   +1 more
doaj   +1 more source

Regularity for nonlinear elliptic equations and systems

open access: yesAtti della Accademia Peloritana dei Pericolanti : Classe di Scienze Fisiche, Matematiche e Naturali, 2020
We study the regularity of weak solutions to the elliptic system in divergence form divA(x, Du)=0 in an open set Ω of R^n, n≥2. The vector field A(x.ξ), A: Ω×R^(m×n)→R^(m×n), has a variational nature in the sense that A(x,ξ)= Dξ f(x,ξ), where f:Ω×R^(m×n)→
Paolo Marcellini
doaj   +1 more source

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